configure

#!/bin/sh
#
# qemu configure script (c) 2003 Fabrice Bellard
#
# set temporary file name
if test ! -z "$TMPDIR" ; then
    TMPDIR1="${TMPDIR}"
elif test ! -z "$TEMPDIR" ; then
    TMPDIR1="${TEMPDIR}"
else
    TMPDIR1="/tmp"
fi

TMPC="${TMPDIR1}/qemu-conf-${RANDOM}-$$-${RANDOM}.c"
TMPB="qemu-conf-${RANDOM}-$$-${RANDOM}"
TMPO="${TMPDIR1}/${TMPB}.o"
TMPCXX="${TMPDIR1}/${TMPB}.cxx"
TMPL="${TMPDIR1}/${TMPB}.lo"
TMPA="${TMPDIR1}/lib${TMPB}.la"
TMPE="${TMPDIR1}/qemu-conf-${RANDOM}-$$-${RANDOM}.exe"

# NB: do not call "exit" in the trap handler; this is buggy with some shells;
# see <1285349658-3122-1-git-send-email-loic.minier@linaro.org>
trap "rm -f $TMPC $TMPO $TMPCXX $TMPE" EXIT INT QUIT TERM
rm -f config.log

# Print a helpful header at the top of config.log
echo "# QEMU configure log $(date)" >> config.log
printf "# Configured with:" >> config.log
printf " '%s'" "$0" "$@" >> config.log
echo >> config.log
echo "#" >> config.log

error_exit() {
    echo
    echo "ERROR: $1"
    while test -n "$2"; do
        echo "       $2"
        shift
    done
    echo
    exit 1
}

do_compiler() {
    # Run the compiler, capturing its output to the log. First argument
    # is compiler binary to execute.
    local compiler="$1"
    shift
    echo $compiler "$@" >> config.log
    $compiler "$@" >> config.log 2>&1 || return $?
    # Test passed. If this is an --enable-werror build, rerun
    # the test with -Werror and bail out if it fails. This
    # makes warning-generating-errors in configure test code
    # obvious to developers.
    if test "$werror" != "yes"; then
        return 0
    fi
    # Don't bother rerunning the compile if we were already using -Werror
    case "$*" in
        *-Werror*)
           return 0
        ;;
    esac
    echo $compiler -Werror "$@" >> config.log
    $compiler -Werror "$@" >> config.log 2>&1 && return $?
    error_exit "configure test passed without -Werror but failed with -Werror." \
        "This is probably a bug in the configure script. The failing command" \
        "will be at the bottom of config.log." \
        "You can run configure with --disable-werror to bypass this check."
}

do_cc() {
    do_compiler "$cc" "$@"
}

do_cxx() {
    do_compiler "$cxx" "$@"
}

update_cxxflags() {
    # Set QEMU_CXXFLAGS from QEMU_CFLAGS by filtering out those
    # options which some versions of GCC's C++ compiler complain about
    # because they only make sense for C programs.
    QEMU_CXXFLAGS=
    for arg in $QEMU_CFLAGS; do
        case $arg in
            -Wstrict-prototypes|-Wmissing-prototypes|-Wnested-externs|\
            -Wold-style-declaration|-Wold-style-definition|-Wredundant-decls)
                ;;
            *)
                QEMU_CXXFLAGS=${QEMU_CXXFLAGS:+$QEMU_CXXFLAGS }$arg
                ;;
        esac
    done
}

compile_object() {
  do_cc $QEMU_CFLAGS -c -o $TMPO $TMPC
}

compile_prog() {
  local_cflags="$1"
  local_ldflags="$2"
  do_cc $QEMU_CFLAGS $local_cflags -o $TMPE $TMPC $LDFLAGS $local_ldflags
}

do_libtool() {
    local mode=$1
    shift
    # Run the compiler, capturing its output to the log.
    echo $libtool $mode --tag=CC $cc "$@" >> config.log
    $libtool $mode --tag=CC $cc "$@" >> config.log 2>&1 || return $?
    # Test passed. If this is an --enable-werror build, rerun
    # the test with -Werror and bail out if it fails. This
    # makes warning-generating-errors in configure test code
    # obvious to developers.
    if test "$werror" != "yes"; then
        return 0
    fi
    # Don't bother rerunning the compile if we were already using -Werror
    case "$*" in
        *-Werror*)
           return 0
        ;;
    esac
    echo $libtool $mode --tag=CC $cc -Werror "$@" >> config.log
    $libtool $mode --tag=CC $cc -Werror "$@" >> config.log 2>&1 && return $?
    error_exit "configure test passed without -Werror but failed with -Werror." \
        "This is probably a bug in the configure script. The failing command" \
        "will be at the bottom of config.log." \
        "You can run configure with --disable-werror to bypass this check."
}

libtool_prog() {
    do_libtool --mode=compile $QEMU_CFLAGS -c -fPIE -DPIE -o $TMPO $TMPC || return $?
    do_libtool --mode=link $LDFLAGS -o $TMPA $TMPL -rpath /usr/local/lib
}

# symbolically link $1 to $2.  Portable version of "ln -sf".
symlink() {
  rm -rf "$2"
  mkdir -p "$(dirname "$2")"
  ln -s "$1" "$2"
}

# check whether a command is available to this shell (may be either an
# executable or a builtin)
has() {
    type "$1" >/dev/null 2>&1
}

# search for an executable in PATH
path_of() {
    local_command="$1"
    local_ifs="$IFS"
    local_dir=""

    # pathname has a dir component?
    if [ "${local_command#*/}" != "$local_command" ]; then
        if [ -x "$local_command" ] && [ ! -d "$local_command" ]; then
            echo "$local_command"
            return 0
        fi
    fi
    if [ -z "$local_command" ]; then
        return 1
    fi

    IFS=:
    for local_dir in $PATH; do
        if [ -x "$local_dir/$local_command" ] && [ ! -d "$local_dir/$local_command" ]; then
            echo "$local_dir/$local_command"
            IFS="${local_ifs:-$(printf ' \t\n')}"
            return 0
        fi
    done
    # not found
    IFS="${local_ifs:-$(printf ' \t\n')}"
    return 1
}

# default parameters
source_path=`dirname "$0"`
cpu=""
iasl="iasl"
interp_prefix="/usr/gnemul/qemu-%M"
static="no"
cross_prefix=""
audio_drv_list=""
block_drv_rw_whitelist=""
block_drv_ro_whitelist=""
host_cc="cc"
libs_softmmu=""
libs_tools=""
audio_pt_int=""
audio_win_int=""
cc_i386=i386-pc-linux-gnu-gcc
libs_qga=""
debug_info="yes"
stack_protector=""

# Don't accept a target_list environment variable.
unset target_list

# Default value for a variable defining feature "foo".
#  * foo="no"  feature will only be used if --enable-foo arg is given
#  * foo=""    feature will be searched for, and if found, will be used
#              unless --disable-foo is given
#  * foo="yes" this value will only be set by --enable-foo flag.
#              feature will searched for,
#              if not found, configure exits with error
#
# Always add --enable-foo and --disable-foo command line args.
# Distributions want to ensure that several features are compiled in, and it
# is impossible without a --enable-foo that exits if a feature is not found.

bluez=""
brlapi=""
curl=""
curses=""
docs=""
fdt=""
netmap="no"
pixman=""
sdl=""
sdlabi="1.2"
virtfs=""
vnc="yes"
sparse="no"
uuid=""
vde=""
vnc_tls=""
vnc_sasl=""
vnc_jpeg=""
vnc_png=""
vnc_ws=""
xen=""
xen_ctrl_version=""
xen_pci_passthrough=""
linux_aio=""
cap_ng=""
attr=""
libattr=""
xfs=""

vhost_net="no"
vhost_scsi="no"
kvm="no"
rdma=""
gprof="no"
debug_tcg="no"
debug="no"
strip_opt="yes"
tcg_interpreter="no"
bigendian="no"
mingw32="no"
gcov="no"
gcov_tool="gcov"
EXESUF=""
DSOSUF=".so"
LDFLAGS_SHARED="-shared"
modules="no"
prefix="/usr/local"
mandir="\${prefix}/share/man"
datadir="\${prefix}/share"
qemu_docdir="\${prefix}/share/doc/qemu"
bindir="\${prefix}/bin"
libdir="\${prefix}/lib"
libexecdir="\${prefix}/libexec"
includedir="\${prefix}/include"
sysconfdir="\${prefix}/etc"
local_statedir="\${prefix}/var"
confsuffix="/qemu"
slirp="yes"
fmod_lib=""
fmod_inc=""
oss_lib=""
bsd="no"
linux="no"
solaris="no"
profiler="no"
cocoa="no"
softmmu="yes"
linux_user="no"
bsd_user="no"
guest_base="yes"
aix="no"
blobs="yes"
pkgversion=""
pie=""
zero_malloc=""
qom_cast_debug="yes"
trace_backend="nop"
trace_file="trace"
spice=""
rbd=""
smartcard_nss=""
libusb=""
usb_redir=""
glx=""
zlib="yes"
lzo="no"
snappy="no"
guest_agent=""
guest_agent_with_vss="no"
vss_win32_sdk=""
win_sdk="no"
want_tools="yes"
libiscsi=""
libnfs=""
coroutine=""
coroutine_pool=""
seccomp=""
glusterfs=""
glusterfs_discard="no"
glusterfs_zerofill="no"
virtio_blk_data_plane=""
gtk=""
gtkabi="2.0"
vte=""
tpm="no"
libssh2=""
vhdx=""
quorum="no"

# parse CC options first
for opt do
  optarg=`expr "x$opt" : 'x[^=]*=\(.*\)'`
  case "$opt" in
  --cross-prefix=*) cross_prefix="$optarg"
  ;;
  --cc=*) CC="$optarg"
  ;;
  --cxx=*) CXX="$optarg"
  ;;
  --source-path=*) source_path="$optarg"
  ;;
  --cpu=*) cpu="$optarg"
  ;;
  --extra-cflags=*) QEMU_CFLAGS="$optarg $QEMU_CFLAGS"
                    EXTRA_CFLAGS="$optarg"
  ;;
  --extra-ldflags=*) LDFLAGS="$optarg $LDFLAGS"
                     EXTRA_LDFLAGS="$optarg"
  ;;
  --enable-debug-info) debug_info="yes"
  ;;
  --disable-debug-info) debug_info="no"
  ;;
  esac
done
# OS specific
# Using uname is really, really broken.  Once we have the right set of checks
# we can eliminate its usage altogether.

# Preferred compiler:
#  ${CC} (if set)
#  ${cross_prefix}gcc (if cross-prefix specified)
#  system compiler
if test -z "${CC}${cross_prefix}"; then
  cc="$host_cc"
else
  cc="${CC-${cross_prefix}gcc}"
fi

if test -z "${CXX}${cross_prefix}"; then
  cxx="c++"
else
  cxx="${CXX-${cross_prefix}g++}"
fi

ar="${AR-${cross_prefix}ar}"
as="${AS-${cross_prefix}as}"
cpp="${CPP-$cc -E}"
objcopy="${OBJCOPY-${cross_prefix}objcopy}"
ld="${LD-${cross_prefix}ld}"
libtool="${LIBTOOL-${cross_prefix}libtool}"
strip="${STRIP-${cross_prefix}strip}"
windres="${WINDRES-${cross_prefix}windres}"
pkg_config_exe="${PKG_CONFIG-${cross_prefix}pkg-config}"
query_pkg_config() {
    "${pkg_config_exe}" ${QEMU_PKG_CONFIG_FLAGS} "$@"
}
pkg_config=query_pkg_config
sdl_config="${SDL_CONFIG-${cross_prefix}sdl-config}"
sdl2_config="${SDL2_CONFIG-${cross_prefix}sdl2-config}"

# If the user hasn't specified ARFLAGS, default to 'rv', just as make does.
ARFLAGS="${ARFLAGS-rv}"

# default flags for all hosts
QEMU_CFLAGS="-fno-strict-aliasing -fno-common $QEMU_CFLAGS"
QEMU_CFLAGS="-Wall -Wundef -Wwrite-strings -Wmissing-prototypes $QEMU_CFLAGS"
QEMU_CFLAGS="-Wstrict-prototypes -Wredundant-decls $QEMU_CFLAGS"
QEMU_CFLAGS="-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE $QEMU_CFLAGS"
QEMU_INCLUDES="-I. -I\$(SRC_PATH) -I\$(SRC_PATH)/include"
if test "$debug_info" = "yes"; then
    CFLAGS="-g $CFLAGS"
    LDFLAGS="-g $LDFLAGS"
fi

# make source path absolute
source_path=`cd "$source_path"; pwd`

# running configure in the source tree?
# we know that's the case if configure is there.
if test -f "./configure"; then
    pwd_is_source_path="y"
else
    pwd_is_source_path="n"
fi

check_define() {
cat > $TMPC <<EOF
#if !defined($1)
#error $1 not defined
#endif
int main(void) { return 0; }
EOF
  compile_object
}

if check_define __linux__ ; then
  targetos="Linux"
elif check_define _WIN32 ; then
  targetos='MINGW32'
elif check_define __OpenBSD__ ; then
  targetos='OpenBSD'
elif check_define __sun__ ; then
  targetos='SunOS'
elif check_define __HAIKU__ ; then
  targetos='Haiku'
else
  targetos=`uname -s`
fi

# Some host OSes need non-standard checks for which CPU to use.
# Note that these checks are broken for cross-compilation: if you're
# cross-compiling to one of these OSes then you'll need to specify
# the correct CPU with the --cpu option.
case $targetos in
Darwin)
  # on Leopard most of the system is 32-bit, so we have to ask the kernel if we can
  # run 64-bit userspace code.
  # If the user didn't specify a CPU explicitly and the kernel says this is
  # 64 bit hw, then assume x86_64. Otherwise fall through to the usual detection code.
  if test -z "$cpu" && test "$(sysctl -n hw.optional.x86_64)" = "1"; then
    cpu="x86_64"
  fi
  ;;
SunOS)
  # `uname -m` returns i86pc even on an x86_64 box, so default based on isainfo
  if test -z "$cpu" && test "$(isainfo -k)" = "amd64"; then
    cpu="x86_64"
  fi
esac

if test ! -z "$cpu" ; then
  # command line argument
  :
elif check_define __i386__ ; then
  cpu="i386"
elif check_define __x86_64__ ; then
  if check_define __ILP32__ ; then
    cpu="x32"
  else
    cpu="x86_64"
  fi
elif check_define __sparc__ ; then
  if check_define __arch64__ ; then
    cpu="sparc64"
  else
    cpu="sparc"
  fi
elif check_define _ARCH_PPC ; then
  if check_define _ARCH_PPC64 ; then
    cpu="ppc64"
  else
    cpu="ppc"
  fi
elif check_define __mips__ ; then
  cpu="mips"
elif check_define __ia64__ ; then
  cpu="ia64"
elif check_define __s390__ ; then
  if check_define __s390x__ ; then
    cpu="s390x"
  else
    cpu="s390"
  fi
elif check_define __arm__ ; then
  cpu="arm"
elif check_define __aarch64__ ; then
  cpu="aarch64"
elif check_define __hppa__ ; then
  cpu="hppa"
else
  cpu=`uname -m`
fi

ARCH=
# Normalise host CPU name and set ARCH.
# Note that this case should only have supported host CPUs, not guests.
case "$cpu" in
  ia64|ppc|ppc64|s390|s390x|sparc64|x32)
    cpu="$cpu"
  ;;
  i386|i486|i586|i686|i86pc|BePC)
    cpu="i386"
  ;;
  x86_64|amd64)
    cpu="x86_64"
  ;;
  armv*b|armv*l|arm)
    cpu="arm"
  ;;
  aarch64)
    cpu="aarch64"
  ;;
  mips*)
    cpu="mips"
  ;;
  sparc|sun4[cdmuv])
    cpu="sparc"
  ;;
  *)
    # This will result in either an error or falling back to TCI later
    ARCH=unknown
  ;;
esac
if test -z "$ARCH"; then
  ARCH="$cpu"
fi

# OS specific

case $targetos in
CYGWIN*)
  mingw32="yes"
  QEMU_CFLAGS="-mno-cygwin $QEMU_CFLAGS"
  audio_possible_drivers="winwave sdl"
  audio_drv_list="winwave"
;;
MINGW32*)
  mingw32="yes"
  audio_possible_drivers="winwave dsound sdl fmod"
  audio_drv_list="winwave"
;;
GNU/kFreeBSD)
  bsd="yes"
  audio_drv_list="oss"
  audio_possible_drivers="oss sdl esd pa"
;;
FreeBSD)
  bsd="yes"
  make="${MAKE-gmake}"
  audio_drv_list="oss"
  audio_possible_drivers="oss sdl esd pa"
  # needed for kinfo_getvmmap(3) in libutil.h
  LIBS="-lutil $LIBS"
  netmap=""  # enable netmap autodetect
;;
DragonFly)
  bsd="yes"
  make="${MAKE-gmake}"
  audio_drv_list="oss"
  audio_possible_drivers="oss sdl esd pa"
;;
NetBSD)
  bsd="yes"
  make="${MAKE-gmake}"
  audio_drv_list="oss"
  audio_possible_drivers="oss sdl esd"
  oss_lib="-lossaudio"
;;
OpenBSD)
  bsd="yes"
  make="${MAKE-gmake}"
  audio_drv_list="sdl"
  audio_possible_drivers="sdl esd"
;;
Darwin)
  bsd="yes"
  darwin="yes"
  LDFLAGS_SHARED="-bundle -undefined dynamic_lookup"
  if [ "$cpu" = "x86_64" ] ; then
    QEMU_CFLAGS="-arch x86_64 $QEMU_CFLAGS"
    LDFLAGS="-arch x86_64 $LDFLAGS"
  fi
  cocoa="yes"
  audio_drv_list="coreaudio"
  audio_possible_drivers="coreaudio sdl fmod"
  LDFLAGS="-framework CoreFoundation -framework IOKit $LDFLAGS"
  libs_softmmu="-F/System/Library/Frameworks -framework Cocoa -framework IOKit $libs_softmmu"
  # Disable attempts to use ObjectiveC features in os/object.h since they
  # won't work when we're compiling with gcc as a C compiler.
  QEMU_CFLAGS="-DOS_OBJECT_USE_OBJC=0 $QEMU_CFLAGS"
;;
SunOS)
  solaris="yes"
  make="${MAKE-gmake}"
  install="${INSTALL-ginstall}"
  ld="gld"
  smbd="${SMBD-/usr/sfw/sbin/smbd}"
  needs_libsunmath="no"
  solarisrev=`uname -r | cut -f2 -d.`
  if [ "$cpu" = "i386" -o "$cpu" = "x86_64" ] ; then
    if test "$solarisrev" -le 9 ; then
      if test -f /opt/SUNWspro/prod/lib/libsunmath.so.1; then
        needs_libsunmath="yes"
        QEMU_CFLAGS="-I/opt/SUNWspro/prod/include/cc $QEMU_CFLAGS"
        LDFLAGS="-L/opt/SUNWspro/prod/lib -R/opt/SUNWspro/prod/lib $LDFLAGS"
        LIBS="-lsunmath $LIBS"
      else
        error_exit "QEMU will not link correctly on Solaris 8/X86 or 9/x86 without" \
            "libsunmath from the Sun Studio compilers tools, due to a lack of" \
            "C99 math features in libm.so in Solaris 8/x86 and Solaris 9/x86" \
            "Studio 11 can be downloaded from www.sun.com."
      fi
    fi
  fi
  if test -f /usr/include/sys/soundcard.h ; then
    audio_drv_list="oss"
  fi
  audio_possible_drivers="oss sdl"
# needed for CMSG_ macros in sys/socket.h
  QEMU_CFLAGS="-D_XOPEN_SOURCE=600 $QEMU_CFLAGS"
# needed for TIOCWIN* defines in termios.h
  QEMU_CFLAGS="-D__EXTENSIONS__ $QEMU_CFLAGS"
  QEMU_CFLAGS="-std=gnu99 $QEMU_CFLAGS"
  solarisnetlibs="-lsocket -lnsl -lresolv"
  LIBS="$solarisnetlibs $LIBS"
  libs_qga="$solarisnetlibs $libs_qga"
;;
AIX)
  aix="yes"
  make="${MAKE-gmake}"
;;
Haiku)
  haiku="yes"
  QEMU_CFLAGS="-DB_USE_POSITIVE_POSIX_ERRORS $QEMU_CFLAGS"
  LIBS="-lposix_error_mapper -lnetwork $LIBS"
;;
*)
  audio_drv_list="oss"
  audio_possible_drivers="oss alsa sdl esd pa"
  linux="yes"
  linux_user="yes"
  kvm="yes"
  vhost_net="yes"
  vhost_scsi="yes"
  if [ "$cpu" = "i386" -o "$cpu" = "x86_64" -o "$cpu" = "x32" ] ; then
    audio_possible_drivers="$audio_possible_drivers fmod"
  fi
  QEMU_INCLUDES="-I\$(SRC_PATH)/linux-headers -I$(pwd)/linux-headers $QEMU_INCLUDES"
;;
esac

if [ "$bsd" = "yes" ] ; then
  if [ "$darwin" != "yes" ] ; then
    bsd_user="yes"
  fi
fi

: ${make=${MAKE-make}}
: ${install=${INSTALL-install}}
: ${python=${PYTHON-python}}
: ${smbd=${SMBD-/usr/sbin/smbd}}

# Default objcc to clang if available, otherwise use CC
if has clang; then
  objcc=clang
else
  objcc="$cc"
fi

if test "$mingw32" = "yes" ; then
  EXESUF=".exe"
  DSOSUF=".dll"
  QEMU_CFLAGS="-DWIN32_LEAN_AND_MEAN -DWINVER=0x501 $QEMU_CFLAGS"
  # enable C99/POSIX format strings (needs mingw32-runtime 3.15 or later)
  QEMU_CFLAGS="-D__USE_MINGW_ANSI_STDIO=1 $QEMU_CFLAGS"
  LIBS="-lwinmm -lws2_32 -liphlpapi $LIBS"
cat > $TMPC << EOF
int main(void) { return 0; }
EOF
  if compile_prog "" "-liberty" ; then
    LIBS="-liberty $LIBS"
  fi
  prefix="c:/Program Files/QEMU"
  mandir="\${prefix}"
  datadir="\${prefix}"
  qemu_docdir="\${prefix}"
  bindir="\${prefix}"
  sysconfdir="\${prefix}"
  local_statedir=
  confsuffix=""
  libs_qga="-lws2_32 -lwinmm -lpowrprof $libs_qga"
fi

werror=""

for opt do
  optarg=`expr "x$opt" : 'x[^=]*=\(.*\)'`
  case "$opt" in
  --help|-h) show_help=yes
  ;;
  --version|-V) exec cat $source_path/VERSION
  ;;
  --prefix=*) prefix="$optarg"
  ;;
  --interp-prefix=*) interp_prefix="$optarg"
  ;;
  --source-path=*)
  ;;
  --cross-prefix=*)
  ;;
  --cc=*)
  ;;
  --host-cc=*) host_cc="$optarg"
  ;;
  --cxx=*)
  ;;
  --iasl=*) iasl="$optarg"
  ;;
  --objcc=*) objcc="$optarg"
  ;;
  --make=*) make="$optarg"
  ;;
  --install=*) install="$optarg"
  ;;
  --python=*) python="$optarg"
  ;;
  --gcov=*) gcov_tool="$optarg"
  ;;
  --smbd=*) smbd="$optarg"
  ;;
  --extra-cflags=*)
  ;;
  --extra-ldflags=*)
  ;;
  --enable-debug-info)
  ;;
  --disable-debug-info)
  ;;
  --enable-modules)
      modules="yes"
  ;;
  --cpu=*)
  ;;
  --target-list=*) target_list="$optarg"
  ;;
  --enable-trace-backend=*) trace_backend="$optarg"
  ;;
  --with-trace-file=*) trace_file="$optarg"
  ;;
  --enable-gprof) gprof="yes"
  ;;
  --enable-gcov) gcov="yes"
  ;;
  --static)
    static="yes"
    LDFLAGS="-static $LDFLAGS"
    QEMU_PKG_CONFIG_FLAGS="--static $QEMU_PKG_CONFIG_FLAGS"
  ;;
  --mandir=*) mandir="$optarg"
  ;;
  --bindir=*) bindir="$optarg"
  ;;
  --libdir=*) libdir="$optarg"
  ;;
  --libexecdir=*) libexecdir="$optarg"
  ;;
  --includedir=*) includedir="$optarg"
  ;;
  --datadir=*) datadir="$optarg"
  ;;
  --with-confsuffix=*) confsuffix="$optarg"
  ;;
  --docdir=*) qemu_docdir="$optarg"
  ;;
  --sysconfdir=*) sysconfdir="$optarg"
  ;;
  --localstatedir=*) local_statedir="$optarg"
  ;;
  --sbindir=*|--sharedstatedir=*|\
  --oldincludedir=*|--datarootdir=*|--infodir=*|--localedir=*|\
  --htmldir=*|--dvidir=*|--pdfdir=*|--psdir=*)
    # These switches are silently ignored, for compatibility with
    # autoconf-generated configure scripts. This allows QEMU's
    # configure to be used by RPM and similar macros that set
    # lots of directory switches by default.
  ;;
  --with-system-pixman) pixman="system"
  ;;
  --without-system-pixman) pixman="internal"
  ;;
  --without-pixman) pixman="none"
  ;;
  --disable-sdl) sdl="no"
  ;;
  --enable-sdl) sdl="yes"
  ;;
  --with-sdlabi=*) sdlabi="$optarg"
  ;;
  --disable-qom-cast-debug) qom_cast_debug="no"
  ;;
  --enable-qom-cast-debug) qom_cast_debug="yes"
  ;;
  --disable-virtfs) virtfs="no"
  ;;
  --enable-virtfs) virtfs="yes"
  ;;
  --disable-vnc) vnc="no"
  ;;
  --enable-vnc) vnc="yes"
  ;;
  --fmod-lib=*) fmod_lib="$optarg"
  ;;
  --fmod-inc=*) fmod_inc="$optarg"
  ;;
  --oss-lib=*) oss_lib="$optarg"
  ;;
  --audio-drv-list=*) audio_drv_list="$optarg"
  ;;
  --block-drv-rw-whitelist=*|--block-drv-whitelist=*) block_drv_rw_whitelist=`echo "$optarg" | sed -e 's/,/ /g'`
  ;;
  --block-drv-ro-whitelist=*) block_drv_ro_whitelist=`echo "$optarg" | sed -e 's/,/ /g'`
  ;;
  --enable-debug-tcg) debug_tcg="yes"
  ;;
  --disable-debug-tcg) debug_tcg="no"
  ;;
  --enable-debug)
      # Enable debugging options that aren't excessively noisy
      debug_tcg="yes"
      debug="yes"
      strip_opt="no"
  ;;
  --enable-sparse) sparse="yes"
  ;;
  --disable-sparse) sparse="no"
  ;;
  --disable-strip) strip_opt="no"
  ;;
  --disable-vnc-tls) vnc_tls="no"
  ;;
  --enable-vnc-tls) vnc_tls="yes"
  ;;
  --disable-vnc-sasl) vnc_sasl="no"
  ;;
  --enable-vnc-sasl) vnc_sasl="yes"
  ;;
  --disable-vnc-jpeg) vnc_jpeg="no"
  ;;
  --enable-vnc-jpeg) vnc_jpeg="yes"
  ;;
  --disable-vnc-png) vnc_png="no"
  ;;
  --enable-vnc-png) vnc_png="yes"
  ;;
  --disable-vnc-ws) vnc_ws="no"
  ;;
  --enable-vnc-ws) vnc_ws="yes"
  ;;
  --disable-slirp) slirp="no"
  ;;
  --disable-uuid) uuid="no"
  ;;
  --enable-uuid) uuid="yes"
  ;;
  --disable-vde) vde="no"
  ;;
  --enable-vde) vde="yes"
  ;;
  --disable-netmap) netmap="no"
  ;;
  --enable-netmap) netmap="yes"
  ;;
  --disable-xen) xen="no"
  ;;
  --enable-xen) xen="yes"
  ;;
  --disable-xen-pci-passthrough) xen_pci_passthrough="no"
  ;;
  --enable-xen-pci-passthrough) xen_pci_passthrough="yes"
  ;;
  --disable-brlapi) brlapi="no"
  ;;
  --enable-brlapi) brlapi="yes"
  ;;
  --disable-bluez) bluez="no"
  ;;
  --enable-bluez) bluez="yes"
  ;;
  --disable-kvm) kvm="no"
  ;;
  --enable-kvm) kvm="yes"
  ;;
  --disable-tcg-interpreter) tcg_interpreter="no"
  ;;
  --enable-tcg-interpreter) tcg_interpreter="yes"
  ;;
  --disable-cap-ng)  cap_ng="no"
  ;;
  --enable-cap-ng) cap_ng="yes"
  ;;
  --disable-spice) spice="no"
  ;;
  --enable-spice) spice="yes"
  ;;
  --disable-libiscsi) libiscsi="no"
  ;;
  --enable-libiscsi) libiscsi="yes"
  ;;
  --disable-libnfs) libnfs="no"
  ;;
  --enable-libnfs) libnfs="yes"
  ;;
  --enable-profiler) profiler="yes"
  ;;
  --disable-cocoa) cocoa="no"
  ;;
  --enable-cocoa)
      cocoa="yes" ;
      sdl="no" ;
      audio_drv_list="coreaudio `echo $audio_drv_list | sed s,coreaudio,,g`"
  ;;
  --disable-system) softmmu="no"
  ;;
  --enable-system) softmmu="yes"
  ;;
  --disable-user)
      linux_user="no" ;
      bsd_user="no" ;
  ;;
  --enable-user) ;;
  --disable-linux-user) linux_user="no"
  ;;
  --enable-linux-user) linux_user="yes"
  ;;
  --disable-bsd-user) bsd_user="no"
  ;;
  --enable-bsd-user) bsd_user="yes"
  ;;
  --enable-guest-base) guest_base="yes"
  ;;
  --disable-guest-base) guest_base="no"
  ;;
  --enable-pie) pie="yes"
  ;;
  --disable-pie) pie="no"
  ;;
  --enable-werror) werror="yes"
  ;;
  --disable-werror) werror="no"
  ;;
  --enable-stack-protector) stack_protector="yes"
  ;;
  --disable-stack-protector) stack_protector="no"
  ;;
  --disable-curses) curses="no"
  ;;
  --enable-curses) curses="yes"
  ;;
  --disable-curl) curl="no"
  ;;
  --enable-curl) curl="yes"
  ;;
  --disable-fdt) fdt="no"
  ;;
  --enable-fdt) fdt="yes"
  ;;
  --disable-linux-aio) linux_aio="no"
  ;;
  --enable-linux-aio) linux_aio="yes"
  ;;
  --disable-attr) attr="no"
  ;;
  --enable-attr) attr="yes"
  ;;
  --disable-blobs) blobs="no"
  ;;
  --with-pkgversion=*) pkgversion=" ($optarg)"
  ;;
  --with-coroutine=*) coroutine="$optarg"
  ;;
  --disable-coroutine-pool) coroutine_pool="no"
  ;;
  --enable-coroutine-pool) coroutine_pool="yes"
  ;;
  --disable-docs) docs="no"
  ;;
  --enable-docs) docs="yes"
  ;;
  --disable-vhost-net) vhost_net="no"
  ;;
  --enable-vhost-net) vhost_net="yes"
  ;;
  --disable-vhost-scsi) vhost_scsi="no"
  ;;
  --enable-vhost-scsi) vhost_scsi="yes"
  ;;
  --disable-glx) glx="no"
  ;;
  --enable-glx) glx="yes"
  ;;
  --disable-rbd) rbd="no"
  ;;
  --enable-rbd) rbd="yes"
  ;;
  --disable-xfsctl) xfs="no"
  ;;
  --enable-xfsctl) xfs="yes"
  ;;
  --disable-smartcard-nss) smartcard_nss="no"
  ;;
  --enable-smartcard-nss) smartcard_nss="yes"
  ;;
  --disable-libusb) libusb="no"
  ;;
  --enable-libusb) libusb="yes"
  ;;
  --disable-usb-redir) usb_redir="no"
  ;;
  --enable-usb-redir) usb_redir="yes"
  ;;
  --disable-zlib-test) zlib="no"
  ;;
  --enable-lzo) lzo="yes"
  ;;
  --enable-snappy) snappy="yes"
  ;;
  --enable-guest-agent) guest_agent="yes"
  ;;
  --disable-guest-agent) guest_agent="no"
  ;;
  --with-vss-sdk) vss_win32_sdk=""
  ;;
  --with-vss-sdk=*) vss_win32_sdk="$optarg"
  ;;
  --without-vss-sdk) vss_win32_sdk="no"
  ;;
  --with-win-sdk) win_sdk=""
  ;;
  --with-win-sdk=*) win_sdk="$optarg"
  ;;
  --without-win-sdk) win_sdk="no"
  ;;
  --enable-tools) want_tools="yes"
  ;;
  --disable-tools) want_tools="no"
  ;;
  --enable-seccomp) seccomp="yes"
  ;;
  --disable-seccomp) seccomp="no"
  ;;
  --disable-glusterfs) glusterfs="no"
  ;;
  --enable-glusterfs) glusterfs="yes"
  ;;
  --disable-virtio-blk-data-plane) virtio_blk_data_plane="no"
  ;;
  --enable-virtio-blk-data-plane) virtio_blk_data_plane="yes"
  ;;
  --disable-gtk) gtk="no"
  ;;
  --enable-gtk) gtk="yes"
  ;;
  --enable-rdma) rdma="yes"
  ;;
  --disable-rdma) rdma="no"
  ;;
  --with-gtkabi=*) gtkabi="$optarg"
  ;;
  --disable-vte) vte="no"
  ;;
  --enable-vte) vte="yes"
  ;;
  --enable-tpm) tpm="yes"
  ;;
  --disable-libssh2) libssh2="no"
  ;;
  --enable-libssh2) libssh2="yes"
  ;;
  --enable-vhdx) vhdx="yes"
  ;;
  --disable-vhdx) vhdx="no"
  ;;
  --disable-quorum) quorum="no"
  ;;
  --enable-quorum) quorum="yes"
  ;;
  *)
      echo "ERROR: unknown option $opt"
      echo "Try '$0 --help' for more information"
      exit 1
  ;;
  esac
done

if ! has $python; then
  error_exit "Python not found. Use --python=/path/to/python"
fi

# Note that if the Python conditional here evaluates True we will exit
# with status 1 which is a shell 'false' value.
if ! $python -c 'import sys; sys.exit(sys.version_info < (2,4) or sys.version_info >= (3,))'; then
  error_exit "Cannot use '$python', Python 2.4 or later is required." \
      "Note that Python 3 or later is not yet supported." \
      "Use --python=/path/to/python to specify a supported Python."
fi

# The -B switch was added in Python 2.6.
# If it is supplied, compiled files are not written.
# Use it for Python versions which support it.
if $python -B -c 'import sys; sys.exit(0)' 2>/dev/null; then
  python="$python -B"
fi

case "$cpu" in
    ppc)
           CPU_CFLAGS="-m32"
           LDFLAGS="-m32 $LDFLAGS"
           ;;
    ppc64)
           CPU_CFLAGS="-m64"
           LDFLAGS="-m64 $LDFLAGS"
           ;;
    sparc)
           LDFLAGS="-m32 $LDFLAGS"
           CPU_CFLAGS="-m32 -mcpu=ultrasparc"
           ;;
    sparc64)
           LDFLAGS="-m64 $LDFLAGS"
           CPU_CFLAGS="-m64 -mcpu=ultrasparc"
           ;;
    s390)
           CPU_CFLAGS="-m31"
           LDFLAGS="-m31 $LDFLAGS"
           ;;
    s390x)
           CPU_CFLAGS="-m64"
           LDFLAGS="-m64 $LDFLAGS"
           ;;
    i386)
           CPU_CFLAGS="-m32"
           LDFLAGS="-m32 $LDFLAGS"
           cc_i386='$(CC) -m32'
           ;;
    x86_64)
           CPU_CFLAGS="-m64"
           LDFLAGS="-m64 $LDFLAGS"
           cc_i386='$(CC) -m32'
           ;;
    x32)
           CPU_CFLAGS="-mx32"
           LDFLAGS="-mx32 $LDFLAGS"
           cc_i386='$(CC) -m32'
           ;;
    # No special flags required for other host CPUs
esac

QEMU_CFLAGS="$CPU_CFLAGS $QEMU_CFLAGS"
EXTRA_CFLAGS="$CPU_CFLAGS $EXTRA_CFLAGS"

default_target_list=""

mak_wilds=""

if [ "$softmmu" = "yes" ]; then
    mak_wilds="${mak_wilds} $source_path/default-configs/*-softmmu.mak"
fi
if [ "$linux_user" = "yes" ]; then
    mak_wilds="${mak_wilds} $source_path/default-configs/*-linux-user.mak"
fi
if [ "$bsd_user" = "yes" ]; then
    mak_wilds="${mak_wilds} $source_path/default-configs/*-bsd-user.mak"
fi

for config in $mak_wilds; do
    default_target_list="${default_target_list} $(basename "$config" .mak)"
done

if test x"$show_help" = x"yes" ; then
cat << EOF

Usage: configure [options]
Options: [defaults in brackets after descriptions]

Standard options:
  --help                   print this message
  --prefix=PREFIX          install in PREFIX [$prefix]
  --interp-prefix=PREFIX   where to find shared libraries, etc.
                           use %M for cpu name [$interp_prefix]
  --target-list=LIST       set target list (default: build everything)
$(echo Available targets: $default_target_list | \
  fold -s -w 53 | sed -e 's/^/                           /')

Advanced options (experts only):
  --source-path=PATH       path of source code [$source_path]
  --cross-prefix=PREFIX    use PREFIX for compile tools [$cross_prefix]
  --cc=CC                  use C compiler CC [$cc]
  --iasl=IASL              use ACPI compiler IASL [$iasl]
  --host-cc=CC             use C compiler CC [$host_cc] for code run at
                           build time
  --cxx=CXX                use C++ compiler CXX [$cxx]
  --objcc=OBJCC            use Objective-C compiler OBJCC [$objcc]
  --extra-cflags=CFLAGS    append extra C compiler flags QEMU_CFLAGS
  --extra-ldflags=LDFLAGS  append extra linker flags LDFLAGS
  --make=MAKE              use specified make [$make]
  --install=INSTALL        use specified install [$install]
  --python=PYTHON          use specified python [$python]
  --smbd=SMBD              use specified smbd [$smbd]
  --static                 enable static build [$static]
  --mandir=PATH            install man pages in PATH
  --datadir=PATH           install firmware in PATH$confsuffix
  --docdir=PATH            install documentation in PATH$confsuffix
  --bindir=PATH            install binaries in PATH
  --libdir=PATH            install libraries in PATH
  --sysconfdir=PATH        install config in PATH$confsuffix
  --localstatedir=PATH     install local state in PATH (set at runtime on win32)
  --with-confsuffix=SUFFIX suffix for QEMU data inside datadir/libdir/sysconfdir [$confsuffix]
  --enable-modules         enable modules support
  --enable-debug-tcg       enable TCG debugging
  --disable-debug-tcg      disable TCG debugging (default)
  --enable-debug-info      enable debugging information (default)
  --disable-debug-info     disable debugging information
  --enable-debug           enable common debug build options
  --enable-sparse          enable sparse checker
  --disable-sparse         disable sparse checker (default)
  --disable-strip          disable stripping binaries
  --disable-werror         disable compilation abort on warning
  --disable-stack-protector disable compiler-provided stack protection
  --disable-sdl            disable SDL
  --enable-sdl             enable SDL
  --with-sdlabi            select preferred SDL ABI 1.2 or 2.0
  --disable-gtk            disable gtk UI
  --enable-gtk             enable gtk UI
  --with-gtkabi            select preferred GTK ABI 2.0 or 3.0
  --disable-virtfs         disable VirtFS
  --enable-virtfs          enable VirtFS
  --disable-vnc            disable VNC
  --enable-vnc             enable VNC
  --disable-cocoa          disable Cocoa (Mac OS X only)
  --enable-cocoa           enable Cocoa (default on Mac OS X)
  --audio-drv-list=LIST    set audio drivers list:
                           Available drivers: $audio_possible_drivers
  --block-drv-whitelist=L  Same as --block-drv-rw-whitelist=L
  --block-drv-rw-whitelist=L
                           set block driver read-write whitelist
                           (affects only QEMU, not qemu-img)
  --block-drv-ro-whitelist=L
                           set block driver read-only whitelist
                           (affects only QEMU, not qemu-img)
  --disable-xen            disable xen backend driver support
  --enable-xen             enable xen backend driver support
  --disable-xen-pci-passthrough
  --enable-xen-pci-passthrough
  --disable-brlapi         disable BrlAPI
  --enable-brlapi          enable BrlAPI
  --disable-vnc-tls        disable TLS encryption for VNC server
  --enable-vnc-tls         enable TLS encryption for VNC server
  --disable-vnc-sasl       disable SASL encryption for VNC server
  --enable-vnc-sasl        enable SASL encryption for VNC server
  --disable-vnc-jpeg       disable JPEG lossy compression for VNC server
  --enable-vnc-jpeg        enable JPEG lossy compression for VNC server
  --disable-vnc-png        disable PNG compression for VNC server (default)
  --enable-vnc-png         enable PNG compression for VNC server
  --disable-vnc-ws         disable Websockets support for VNC server
  --enable-vnc-ws          enable Websockets support for VNC server
  --disable-curses         disable curses output
  --enable-curses          enable curses output
  --disable-curl           disable curl connectivity
  --enable-curl            enable curl connectivity
  --disable-fdt            disable fdt device tree
  --enable-fdt             enable fdt device tree
  --disable-bluez          disable bluez stack connectivity
  --enable-bluez           enable bluez stack connectivity
  --disable-slirp          disable SLIRP userspace network connectivity
  --disable-kvm            disable KVM acceleration support
  --enable-kvm             enable KVM acceleration support
  --disable-rdma           disable RDMA-based migration support
  --enable-rdma            enable RDMA-based migration support
  --enable-tcg-interpreter enable TCG with bytecode interpreter (TCI)
  --enable-system          enable all system emulation targets
  --disable-system         disable all system emulation targets
  --enable-user            enable supported user emulation targets
  --disable-user           disable all user emulation targets
  --enable-linux-user      enable all linux usermode emulation targets
  --disable-linux-user     disable all linux usermode emulation targets
  --enable-bsd-user        enable all BSD usermode emulation targets
  --disable-bsd-user       disable all BSD usermode emulation targets
  --enable-guest-base      enable GUEST_BASE support for usermode
                           emulation targets
  --disable-guest-base     disable GUEST_BASE support
  --enable-pie             build Position Independent Executables
  --disable-pie            do not build Position Independent Executables
  --fmod-lib               path to FMOD library
  --fmod-inc               path to FMOD includes
  --oss-lib                path to OSS library
  --cpu=CPU                Build for host CPU [$cpu]
  --disable-uuid           disable uuid support
  --enable-uuid            enable uuid support
  --disable-vde            disable support for vde network
  --enable-vde             enable support for vde network
  --disable-netmap         disable support for netmap network
  --enable-netmap          enable support for netmap network
  --disable-linux-aio      disable Linux AIO support
  --enable-linux-aio       enable Linux AIO support
  --disable-cap-ng         disable libcap-ng support
  --enable-cap-ng          enable libcap-ng support
  --disable-attr           disables attr and xattr support
  --enable-attr            enable attr and xattr support
  --disable-blobs          disable installing provided firmware blobs
  --enable-docs            enable documentation build
  --disable-docs           disable documentation build
  --disable-vhost-net      disable vhost-net acceleration support
  --enable-vhost-net       enable vhost-net acceleration support
  --enable-trace-backend=B Set trace backend
                           Available backends: $($python $source_path/scripts/tracetool.py --list-backends)
  --with-trace-file=NAME   Full PATH,NAME of file to store traces
                           Default:trace-<pid>
  --disable-spice          disable spice
  --enable-spice           enable spice
  --enable-rbd             enable building the rados block device (rbd)
  --disable-libiscsi       disable iscsi support
  --enable-libiscsi        enable iscsi support
  --disable-libnfs         disable nfs support
  --enable-libnfs          enable nfs support
  --disable-smartcard-nss  disable smartcard nss support
  --enable-smartcard-nss   enable smartcard nss support
  --disable-libusb         disable libusb (for usb passthrough)
  --enable-libusb          enable libusb (for usb passthrough)
  --disable-usb-redir      disable usb network redirection support
  --enable-usb-redir       enable usb network redirection support
  --enable-lzo             enable the support of lzo compression library
  --enable-snappy          enable the support of snappy compression library
  --disable-guest-agent    disable building of the QEMU Guest Agent
  --enable-guest-agent     enable building of the QEMU Guest Agent
  --with-vss-sdk=SDK-path  enable Windows VSS support in QEMU Guest Agent
  --with-win-sdk=SDK-path  path to Windows Platform SDK (to build VSS .tlb)
  --disable-seccomp        disable seccomp support
  --enable-seccomp         enables seccomp support
  --with-coroutine=BACKEND coroutine backend. Supported options:
                           gthread, ucontext, sigaltstack, windows
  --disable-coroutine-pool disable coroutine freelist (worse performance)
  --enable-coroutine-pool  enable coroutine freelist (better performance)
  --enable-glusterfs       enable GlusterFS backend
  --disable-glusterfs      disable GlusterFS backend
  --enable-gcov            enable test coverage analysis with gcov
  --gcov=GCOV              use specified gcov [$gcov_tool]
  --enable-tpm             enable TPM support
  --disable-libssh2        disable ssh block device support
  --enable-libssh2         enable ssh block device support
  --disable-vhdx           disables support for the Microsoft VHDX image format
  --enable-vhdx            enable support for the Microsoft VHDX image format
  --disable-quorum         disable quorum block filter support
  --enable-quorum          enable quorum block filter support

NOTE: The object files are built at the place where configure is launched
EOF
exit 0
fi

# Now we have handled --enable-tcg-interpreter and know we're not just
# printing the help message, bail out if the host CPU isn't supported.
if test "$ARCH" = "unknown"; then
    if test "$tcg_interpreter" = "yes" ; then
        echo "Unsupported CPU = $cpu, will use TCG with TCI (experimental)"
        ARCH=tci
    else
        error_exit "Unsupported CPU = $cpu, try --enable-tcg-interpreter"
    fi
fi

# Consult white-list to determine whether to enable werror
# by default.  Only enable by default for git builds
z_version=`cut -f3 -d. $source_path/VERSION`

if test -z "$werror" ; then
    if test -d "$source_path/.git" -a \
        "$linux" = "yes" ; then
        werror="yes"
    else
        werror="no"
    fi
fi

# check that the C compiler works.
cat > $TMPC <<EOF
int main(void) { return 0; }
EOF

if compile_object ; then
  : C compiler works ok
else
    error_exit "\"$cc\" either does not exist or does not work"
fi

# Check that the C++ compiler exists and works with the C compiler
if has $cxx; then
    cat > $TMPC <<EOF
int c_function(void);
int main(void) { return c_function(); }
EOF

    compile_object

    cat > $TMPCXX <<EOF
extern "C" {
   int c_function(void);
}
int c_function(void) { return 42; }
EOF

    update_cxxflags

    if do_cxx $QEMU_CXXFLAGS -o $TMPE $TMPCXX $TMPO $LDFLAGS; then
        # C++ compiler $cxx works ok with C compiler $cc
        :
    else
        echo "C++ compiler $cxx does not work with C compiler $cc"
        echo "Disabling C++ specific optional code"
        cxx=
    fi
else
    echo "No C++ compiler available; disabling C++ specific optional code"
    cxx=
fi

gcc_flags="-Wold-style-declaration -Wold-style-definition -Wtype-limits"
gcc_flags="-Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers $gcc_flags"
gcc_flags="-Wmissing-include-dirs -Wempty-body -Wnested-externs $gcc_flags"
gcc_flags="-Wendif-labels $gcc_flags"
gcc_flags="-Wno-initializer-overrides $gcc_flags"
gcc_flags="-Wno-string-plus-int $gcc_flags"
# Note that we do not add -Werror to gcc_flags here, because that would
# enable it for all configure tests. If a configure test failed due
# to -Werror this would just silently disable some features,
# so it's too error prone.
cat > $TMPC << EOF
int main(void) { return 0; }
EOF
for flag in $gcc_flags; do
    # Use the positive sense of the flag when testing for -Wno-wombat
    # support (gcc will happily accept the -Wno- form of unknown
    # warning options).
    optflag="$(echo $flag | sed -e 's/^-Wno-/-W/')"
    if compile_prog "-Werror $optflag" "" ; then
	QEMU_CFLAGS="$QEMU_CFLAGS $flag"
    fi
done

if test "$stack_protector" != "no" ; then
  gcc_flags="-fstack-protector-strong -fstack-protector-all"
  for flag in $gcc_flags; do
    # We need to check both a compile and a link, since some compiler
    # setups fail only on a .c->.o compile and some only at link time
    if do_cc $QEMU_CFLAGS -Werror $flag -c -o $TMPO $TMPC &&
       compile_prog "-Werror $flag" ""; then
      QEMU_CFLAGS="$QEMU_CFLAGS $flag"
      LIBTOOLFLAGS="$LIBTOOLFLAGS -Wc,$flag"
      break
    fi
  done
fi

# Workaround for http://gcc.gnu.org/PR55489.  Happens with -fPIE/-fPIC and
# large functions that use global variables.  The bug is in all releases of
# GCC, but it became particularly acute in 4.6.x and 4.7.x.  It is fixed in
# 4.7.3 and 4.8.0.  We should be able to delete this at the end of 2013.
cat > $TMPC << EOF
#if __GNUC__ == 4 && (__GNUC_MINOR__ == 6 || (__GNUC_MINOR__ == 7 && __GNUC_PATCHLEVEL__ <= 2))
int main(void) { return 0; }
#else
#error No bug in this compiler.
#endif
EOF
if compile_prog "-Werror -fno-gcse" "" ; then
  TRANSLATE_OPT_CFLAGS=-fno-gcse
fi

if test "$static" = "yes" ; then
  if test "$modules" = "yes" ; then
    error_exit "static and modules are mutually incompatible"
  fi
  if test "$pie" = "yes" ; then
    error_exit "static and pie are mutually incompatible"
  else
    pie="no"
  fi
fi

if test "$pie" = ""; then
  case "$cpu-$targetos" in
    i386-Linux|x86_64-Linux|x32-Linux|i386-OpenBSD|x86_64-OpenBSD)
      ;;
    *)
      pie="no"
      ;;
  esac
fi

if test "$pie" != "no" ; then
  cat > $TMPC << EOF

#ifdef __linux__
#  define THREAD __thread
#else
#  define THREAD
#endif

static THREAD int tls_var;

int main(void) { return tls_var; }

EOF
  if compile_prog "-fPIE -DPIE" "-pie"; then
    QEMU_CFLAGS="-fPIE -DPIE $QEMU_CFLAGS"
    LDFLAGS="-pie $LDFLAGS"
    pie="yes"
    if compile_prog "" "-Wl,-z,relro -Wl,-z,now" ; then
      LDFLAGS="-Wl,-z,relro -Wl,-z,now $LDFLAGS"
    fi
  else
    if test "$pie" = "yes"; then
      error_exit "PIE not available due to missing toolchain support"
    else
      echo "Disabling PIE due to missing toolchain support"
      pie="no"
    fi
  fi

  if compile_prog "-fno-pie" "-nopie"; then
    CFLAGS_NOPIE="-fno-pie"
    LDFLAGS_NOPIE="-nopie"
  fi
fi

# check for broken gcc and libtool in RHEL5
if test -n "$libtool" -a "$pie" != "no" ; then
  cat > $TMPC <<EOF

void *f(unsigned char *buf, int len);
void *g(unsigned char *buf, int len);

void *
f(unsigned char *buf, int len)
{
    return (void*)0L;
}

void *
g(unsigned char *buf, int len)
{
    return f(buf, len);
}

EOF
  if ! libtool_prog; then
    echo "Disabling libtool due to broken toolchain support"
    libtool=
  fi
fi

##########################################
# __sync_fetch_and_and requires at least -march=i486. Many toolchains
# use i686 as default anyway, but for those that don't, an explicit
# specification is necessary

if test "$cpu" = "i386"; then
  cat > $TMPC << EOF
static int sfaa(int *ptr)
{
  return __sync_fetch_and_and(ptr, 0);
}

int main(void)
{
  int val = 42;
  val = __sync_val_compare_and_swap(&val, 0, 1);
  sfaa(&val);
  return val;
}
EOF
  if ! compile_prog "" "" ; then
    QEMU_CFLAGS="-march=i486 $QEMU_CFLAGS"
  fi
fi

#########################################
# Solaris specific configure tool chain decisions

if test "$solaris" = "yes" ; then
  if has $install; then
    :
  else
    error_exit "Solaris install program not found. Use --install=/usr/ucb/install or" \
        "install fileutils from www.blastwave.org using pkg-get -i fileutils" \
        "to get ginstall which is used by default (which lives in /opt/csw/bin)"
  fi
  if test "`path_of $install`" = "/usr/sbin/install" ; then
    error_exit "Solaris /usr/sbin/install is not an appropriate install program." \
        "try ginstall from the GNU fileutils available from www.blastwave.org" \
        "using pkg-get -i fileutils, or use --install=/usr/ucb/install"
  fi
  if has ar; then
    :
  else
    if test -f /usr/ccs/bin/ar ; then
      error_exit "No path includes ar" \
          "Add /usr/ccs/bin to your path and rerun configure"
    fi
    error_exit "No path includes ar"
  fi
fi

if test -z "${target_list+xxx}" ; then
    target_list="$default_target_list"
else
    target_list=`echo "$target_list" | sed -e 's/,/ /g'`
fi

# Check that we recognised the target name; this allows a more
# friendly error message than if we let it fall through.
for target in $target_list; do
    case " $default_target_list " in
        *" $target "*)
            ;;
        *)
            error_exit "Unknown target name '$target'"
            ;;
    esac
done

# see if system emulation was really requested
case " $target_list " in
  *"-softmmu "*) softmmu=yes
  ;;
  *) softmmu=no
  ;;
esac

feature_not_found() {
  feature=$1
  remedy=$2

  error_exit "User requested feature $feature" \
      "configure was not able to find it." \
      "$remedy"
}

# ---
# big/little endian test
cat > $TMPC << EOF
short big_endian[] = { 0x4269, 0x4765, 0x4e64, 0x4961, 0x4e00, 0, };
short little_endian[] = { 0x694c, 0x7454, 0x654c, 0x6e45, 0x6944, 0x6e41, 0, };
extern int foo(short *, short *);
int main(int argc, char *argv[]) {
    return foo(big_endian, little_endian);
}
EOF

if compile_object ; then
    if grep -q BiGeNdIaN $TMPO ; then
        bigendian="yes"
    elif grep -q LiTtLeEnDiAn $TMPO ; then
        bigendian="no"
    else
        echo big/little test failed
    fi
else
    echo big/little test failed
fi

##########################################
# pkg-config probe

if ! has "$pkg_config_exe"; then
  error_exit "pkg-config binary '$pkg_config_exe' not found"
fi

##########################################
# NPTL probe

if test "$linux_user" = "yes"; then
  cat > $TMPC <<EOF
#include <sched.h>
#include <linux/futex.h>
int main(void) {
#if !defined(CLONE_SETTLS) || !defined(FUTEX_WAIT)
#error bork
#endif
  return 0;
}
EOF
  if ! compile_object ; then
    feature_not_found "nptl" "Install glibc and linux kernel headers."
  fi
fi

##########################################
# zlib check

if test "$zlib" != "no" ; then
    cat > $TMPC << EOF
#include <zlib.h>
int main(void) { zlibVersion(); return 0; }
EOF
    if compile_prog "" "-lz" ; then
        :
    else
        error_exit "zlib check failed" \
            "Make sure to have the zlib libs and headers installed."
    fi
fi
LIBS="$LIBS -lz"

##########################################
# lzo check

if test "$lzo" != "no" ; then
    cat > $TMPC << EOF
#include <lzo/lzo1x.h>
int main(void) { lzo_version(); return 0; }
EOF
    if compile_prog "" "-llzo2" ; then
        :
    else
        error_exit "lzo check failed" \
            "Make sure to have the lzo libs and headers installed."
    fi

    libs_softmmu="$libs_softmmu -llzo2"
fi

##########################################
# snappy check

if test "$snappy" != "no" ; then
    cat > $TMPC << EOF
#include <snappy-c.h>
int main(void) { snappy_max_compressed_length(4096); return 0; }
EOF
    if compile_prog "" "-lsnappy" ; then
        :
    else
        error_exit "snappy check failed" \
            "Make sure to have the snappy libs and headers installed."
    fi

    libs_softmmu="$libs_softmmu -lsnappy"
fi

##########################################
# libseccomp check

if test "$seccomp" != "no" ; then
    if $pkg_config --atleast-version=2.1.0 libseccomp; then
        libs_softmmu="$libs_softmmu `$pkg_config --libs libseccomp`"
        QEMU_CFLAGS="$QEMU_CFLAGS `$pkg_config --cflags libseccomp`"
	seccomp="yes"
    else
	if test "$seccomp" = "yes"; then
            feature_not_found "libseccomp" "Install libseccomp devel >= 2.1.0"
	fi
	seccomp="no"
    fi
fi
##########################################
# xen probe

if test "$xen" != "no" ; then
  xen_libs="-lxenstore -lxenctrl -lxenguest"

  # First we test whether Xen headers and libraries are available.
  # If no, we are done and there is no Xen support.
  # If yes, more tests are run to detect the Xen version.

  # Xen (any)
  cat > $TMPC <<EOF
#include <xenctrl.h>
int main(void) {
  return 0;
}
EOF
  if ! compile_prog "" "$xen_libs" ; then
    # Xen not found
    if test "$xen" = "yes" ; then
      feature_not_found "xen" "Install xen devel"
    fi
    xen=no

  # Xen unstable
  elif
      cat > $TMPC <<EOF &&
#include <xenctrl.h>
#include <xenstore.h>
#include <stdint.h>
#include <xen/hvm/hvm_info_table.h>
#if !defined(HVM_MAX_VCPUS)
# error HVM_MAX_VCPUS not defined
#endif
int main(void) {
  xc_interface *xc;
  xs_daemon_open();
  xc = xc_interface_open(0, 0, 0);
  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
  xc_gnttab_open(NULL, 0);
  xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
  xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
  return 0;
}
EOF
      compile_prog "" "$xen_libs"
    then
    xen_ctrl_version=420
    xen=yes

  elif
      cat > $TMPC <<EOF &&
#include <xenctrl.h>
#include <xs.h>
#include <stdint.h>
#include <xen/hvm/hvm_info_table.h>
#if !defined(HVM_MAX_VCPUS)
# error HVM_MAX_VCPUS not defined
#endif
int main(void) {
  xs_daemon_open();
  xc_interface_open(0, 0, 0);
  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
  xc_gnttab_open(NULL, 0);
  xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
  return 0;
}
EOF
      compile_prog "" "$xen_libs"
    then
    xen_ctrl_version=410
    xen=yes

  # Xen 4.0.0
  elif
      cat > $TMPC <<EOF &&
#include <xenctrl.h>
#include <xs.h>
#include <stdint.h>
#include <xen/hvm/hvm_info_table.h>
#if !defined(HVM_MAX_VCPUS)
# error HVM_MAX_VCPUS not defined
#endif
int main(void) {
  struct xen_add_to_physmap xatp = {
    .domid = 0, .space = XENMAPSPACE_gmfn, .idx = 0, .gpfn = 0,
  };
  xs_daemon_open();
  xc_interface_open();
  xc_gnttab_open();
  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
  xc_memory_op(0, XENMEM_add_to_physmap, &xatp);
  return 0;
}
EOF
      compile_prog "" "$xen_libs"
    then
    xen_ctrl_version=400
    xen=yes

  # Xen 3.4.0
  elif
      cat > $TMPC <<EOF &&
#include <xenctrl.h>
#include <xs.h>
int main(void) {
  struct xen_add_to_physmap xatp = {
    .domid = 0, .space = XENMAPSPACE_gmfn, .idx = 0, .gpfn = 0,
  };
  xs_daemon_open();
  xc_interface_open();
  xc_gnttab_open();
  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
  xc_memory_op(0, XENMEM_add_to_physmap, &xatp);
  return 0;
}
EOF
      compile_prog "" "$xen_libs"
    then
    xen_ctrl_version=340
    xen=yes

  # Xen 3.3.0
  elif
      cat > $TMPC <<EOF &&
#include <xenctrl.h>
#include <xs.h>
int main(void) {
  xs_daemon_open();
  xc_interface_open();
  xc_gnttab_open();
  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
  return 0;
}
EOF
      compile_prog "" "$xen_libs"
    then
    xen_ctrl_version=330
    xen=yes

  # Xen version unsupported
  else
    if test "$xen" = "yes" ; then
      feature_not_found "xen (unsupported version)" "Install supported xen (e.g. 4.0, 3.4, 3.3)"
    fi
    xen=no
  fi

  if test "$xen" = yes; then
    libs_softmmu="$xen_libs $libs_softmmu"
  fi
fi

if test "$xen_pci_passthrough" != "no"; then
  if test "$xen" = "yes" && test "$linux" = "yes" &&
    test "$xen_ctrl_version" -ge 340; then
    xen_pci_passthrough=yes
  else
    if test "$xen_pci_passthrough" = "yes"; then
      if test "$xen_ctrl_version" -lt 340; then
        error_exit "User requested feature Xen PCI Passthrough" \
            "This feature does not work with Xen 3.3"
      fi
      error_exit "User requested feature Xen PCI Passthrough" \
          " but this feature requires /sys from Linux"
    fi
    xen_pci_passthrough=no
  fi
fi

##########################################
# libtool probe

if ! has $libtool; then
    libtool=
fi

# MacOSX ships with a libtool which isn't the GNU one; weed this
# out by checking whether libtool supports the --version switch
if test -n "$libtool"; then
  if ! "$libtool" --version >/dev/null 2>&1; then
    libtool=
  fi
fi

##########################################
# Sparse probe
if test "$sparse" != "no" ; then
  if has cgcc; then
    sparse=yes
  else
    if test "$sparse" = "yes" ; then
      feature_not_found "sparse" "Install sparse binary"
    fi
    sparse=no
  fi
fi

##########################################
# GTK probe

if test "$gtk" != "no"; then
    gtkpackage="gtk+-$gtkabi"
    if test "$gtkabi" = "3.0" ; then
      gtkversion="3.0.0"
    else
      gtkversion="2.18.0"
    fi
    if $pkg_config --exists "$gtkpackage >= $gtkversion"; then
        gtk_cflags=`$pkg_config --cflags $gtkpackage`
        gtk_libs=`$pkg_config --libs $gtkpackage`
        libs_softmmu="$gtk_libs $libs_softmmu"
        gtk="yes"
    elif test "$gtk" = "yes"; then
        feature_not_found "gtk" "Install gtk2 or gtk3 (requires --with-gtkabi=3.0 option to configure) devel"
    else
        gtk="no"
    fi
fi

##########################################
# VTE probe

if test "$vte" != "no"; then
    if test "$gtkabi" = "3.0"; then
      vtepackage="vte-2.90"
      vteversion="0.32.0"
    else
      vtepackage="vte"
      vteversion="0.24.0"
    fi
    if $pkg_config --exists "$vtepackage >= $vteversion"; then
        vte_cflags=`$pkg_config --cflags $vtepackage`
        vte_libs=`$pkg_config --libs $vtepackage`
        libs_softmmu="$vte_libs $libs_softmmu"
        vte="yes"
    elif test "$vte" = "yes"; then
        feature_not_found "vte" "Install libvte or libvte-2.90 (requires --with-gtkabi=3.0 option to configure) devel"
    else
        vte="no"
    fi
fi

##########################################
# SDL probe

# Look for sdl configuration program (pkg-config or sdl-config).  Try
# sdl-config even without cross prefix, and favour pkg-config over sdl-config.

if test $sdlabi = "2.0"; then
    sdl_config=$sdl2_config
    sdlname=sdl2
    sdlconfigname=sdl2_config
else
    sdlname=sdl
    sdlconfigname=sdl_config
fi

if test "`basename $sdl_config`" != $sdlconfigname && ! has ${sdl_config}; then
  sdl_config=$sdlconfigname
fi

if $pkg_config $sdlname --exists; then
  sdlconfig="$pkg_config $sdlname"
  _sdlversion=`$sdlconfig --modversion 2>/dev/null | sed 's/[^0-9]//g'`
elif has ${sdl_config}; then
  sdlconfig="$sdl_config"
  _sdlversion=`$sdlconfig --version | sed 's/[^0-9]//g'`
else
  if test "$sdl" = "yes" ; then
    feature_not_found "sdl" "Install SDL devel"
  fi
  sdl=no
fi
if test -n "$cross_prefix" && test "$(basename "$sdlconfig")" = sdl-config; then
  echo warning: using "\"$sdlconfig\"" to detect cross-compiled sdl >&2
fi

sdl_too_old=no
if test "$sdl" != "no" ; then
  cat > $TMPC << EOF
#include <SDL.h>
#undef main /* We don't want SDL to override our main() */
int main( void ) { return SDL_Init (SDL_INIT_VIDEO); }
EOF
  sdl_cflags=`$sdlconfig --cflags 2> /dev/null`
  if test "$static" = "yes" ; then
    sdl_libs=`$sdlconfig --static-libs 2>/dev/null`
  else
    sdl_libs=`$sdlconfig --libs 2> /dev/null`
  fi
  if compile_prog "$sdl_cflags" "$sdl_libs" ; then
    if test "$_sdlversion" -lt 121 ; then
      sdl_too_old=yes
    else
      if test "$cocoa" = "no" ; then
        sdl=yes
      fi
    fi

    # static link with sdl ? (note: sdl.pc's --static --libs is broken)
    if test "$sdl" = "yes" -a "$static" = "yes" ; then
      if test $? = 0 && echo $sdl_libs | grep -- -laa > /dev/null; then
         sdl_libs="$sdl_libs `aalib-config --static-libs 2>/dev/null`"
         sdl_cflags="$sdl_cflags `aalib-config --cflags 2>/dev/null`"
      fi
      if compile_prog "$sdl_cflags" "$sdl_libs" ; then
	:
      else
        sdl=no
      fi
    fi # static link
  else # sdl not found
    if test "$sdl" = "yes" ; then
      feature_not_found "sdl" "Install SDL devel"
    fi
    sdl=no
  fi # sdl compile test
fi

if test "$sdl" = "yes" ; then
  cat > $TMPC <<EOF
#include <SDL.h>
#if defined(SDL_VIDEO_DRIVER_X11)
#include <X11/XKBlib.h>
#else
#error No x11 support
#endif
int main(void) { return 0; }
EOF
  if compile_prog "$sdl_cflags" "$sdl_libs" ; then
    sdl_libs="$sdl_libs -lX11"
  fi
  libs_softmmu="$sdl_libs $libs_softmmu"
fi

##########################################
# RDMA needs OpenFabrics libraries
if test "$rdma" != "no" ; then
  cat > $TMPC <<EOF
#include <rdma/rdma_cma.h>
int main(void) { return 0; }
EOF
  rdma_libs="-lrdmacm -libverbs"
  if compile_prog "" "$rdma_libs" ; then
    rdma="yes"
    libs_softmmu="$libs_softmmu $rdma_libs"
  else
    if test "$rdma" = "yes" ; then
        error_exit \
            " OpenFabrics librdmacm/libibverbs not present." \
            " Your options:" \
            "  (1) Fast: Install infiniband packages from your distro." \
            "  (2) Cleanest: Install libraries from www.openfabrics.org" \
            "  (3) Also: Install softiwarp if you don't have RDMA hardware"
    fi
    rdma="no"
  fi
fi

##########################################
# VNC TLS/WS detection
if test "$vnc" = "yes" -a \( "$vnc_tls" != "no" -o "$vnc_ws" != "no" \) ; then
  cat > $TMPC <<EOF
#include <gnutls/gnutls.h>
int main(void) { gnutls_session_t s; gnutls_init(&s, GNUTLS_SERVER); return 0; }
EOF
  vnc_tls_cflags=`$pkg_config --cflags gnutls 2> /dev/null`
  vnc_tls_libs=`$pkg_config --libs gnutls 2> /dev/null`
  if compile_prog "$vnc_tls_cflags" "$vnc_tls_libs" ; then
    if test "$vnc_tls" != "no" ; then
      vnc_tls=yes
    fi
    if test "$vnc_ws" != "no" ; then
      vnc_ws=yes
    fi
    libs_softmmu="$vnc_tls_libs $libs_softmmu"
    QEMU_CFLAGS="$QEMU_CFLAGS $vnc_tls_cflags"
  else
    if test "$vnc_tls" = "yes" ; then
      feature_not_found "vnc-tls" "Install gnutls devel"
    fi
    if test "$vnc_ws" = "yes" ; then
      feature_not_found "vnc-ws" "Install gnutls devel"
    fi
    vnc_tls=no
    vnc_ws=no
  fi
fi

##########################################
# Quorum probe (check for gnutls)
if test "$quorum" != "no" ; then
cat > $TMPC <<EOF
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
int main(void) {char data[4096], digest[32];
gnutls_hash_fast(GNUTLS_DIG_SHA256, data, 4096, digest);
return 0;
}
EOF
quorum_tls_cflags=`$pkg_config --cflags gnutls 2> /dev/null`
quorum_tls_libs=`$pkg_config --libs gnutls 2> /dev/null`
if compile_prog "$quorum_tls_cflags" "$quorum_tls_libs" ; then
  qcow_tls=yes
  libs_softmmu="$quorum_tls_libs $libs_softmmu"
  libs_tools="$quorum_tls_libs $libs_softmmu"
  QEMU_CFLAGS="$QEMU_CFLAGS $quorum_tls_cflags"
else
  echo "gnutls > 2.10.0 required to compile Quorum"
  exit 1
fi
fi

##########################################
# VNC SASL detection
if test "$vnc" = "yes" -a "$vnc_sasl" != "no" ; then
  cat > $TMPC <<EOF
#include <sasl/sasl.h>
#include <stdio.h>
int main(void) { sasl_server_init(NULL, "qemu"); return 0; }
EOF
  # Assuming Cyrus-SASL installed in /usr prefix
  vnc_sasl_cflags=""
  vnc_sasl_libs="-lsasl2"
  if compile_prog "$vnc_sasl_cflags" "$vnc_sasl_libs" ; then
    vnc_sasl=yes
    libs_softmmu="$vnc_sasl_libs $libs_softmmu"
    QEMU_CFLAGS="$QEMU_CFLAGS $vnc_sasl_cflags"
  else
    if test "$vnc_sasl" = "yes" ; then
      feature_not_found "vnc-sasl" "Install Cyrus SASL devel"
    fi
    vnc_sasl=no
  fi
fi

##########################################
# VNC JPEG detection
if test "$vnc" = "yes" -a "$vnc_jpeg" != "no" ; then
cat > $TMPC <<EOF
#include <stdio.h>
#include <jpeglib.h>
int main(void) { struct jpeg_compress_struct s; jpeg_create_compress(&s); return 0; }
EOF
    vnc_jpeg_cflags=""
    vnc_jpeg_libs="-ljpeg"
  if compile_prog "$vnc_jpeg_cflags" "$vnc_jpeg_libs" ; then
    vnc_jpeg=yes
    libs_softmmu="$vnc_jpeg_libs $libs_softmmu"
    QEMU_CFLAGS="$QEMU_CFLAGS $vnc_jpeg_cflags"
  else
    if test "$vnc_jpeg" = "yes" ; then
      feature_not_found "vnc-jpeg" "Install libjpeg-turbo devel"
    fi
    vnc_jpeg=no
  fi
fi

##########################################
# VNC PNG detection
if test "$vnc" = "yes" -a "$vnc_png" != "no" ; then
cat > $TMPC <<EOF
//#include <stdio.h>
#include <png.h>
#include <stddef.h>
int main(void) {
    png_structp png_ptr;
    png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
    return png_ptr != 0;
}
EOF
  if $pkg_config libpng --exists; then
    vnc_png_cflags=`$pkg_config libpng --cflags`
    vnc_png_libs=`$pkg_config libpng --libs`
  else
    vnc_png_cflags=""
    vnc_png_libs="-lpng"
  fi
  if compile_prog "$vnc_png_cflags" "$vnc_png_libs" ; then
    vnc_png=yes
    libs_softmmu="$vnc_png_libs $libs_softmmu"
    QEMU_CFLAGS="$QEMU_CFLAGS $vnc_png_cflags"
  else
    if test "$vnc_png" = "yes" ; then
      feature_not_found "vnc-png" "Install libpng devel"
    fi
    vnc_png=no
  fi
fi

##########################################
# fnmatch() probe, used for ACL routines
fnmatch="no"
cat > $TMPC << EOF
#include <fnmatch.h>
int main(void)
{
    fnmatch("foo", "foo", 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
   fnmatch="yes"
fi

##########################################
# uuid_generate() probe, used for vdi block driver
# Note that on some systems (notably MacOSX) no extra library
# need be linked to get the uuid functions.
if test "$uuid" != "no" ; then
  uuid_libs="-luuid"
  cat > $TMPC << EOF
#include <uuid/uuid.h>
int main(void)
{
    uuid_t my_uuid;
    uuid_generate(my_uuid);
    return 0;
}
EOF
  if compile_prog "" "" ; then
    uuid="yes"
  elif compile_prog "" "$uuid_libs" ; then
    uuid="yes"
    libs_softmmu="$uuid_libs $libs_softmmu"
    libs_tools="$uuid_libs $libs_tools"
  else
    if test "$uuid" = "yes" ; then
      feature_not_found "uuid" "Install libuuid devel"
    fi
    uuid=no
  fi
fi

if test "$vhdx" = "yes" ; then
    if test "$uuid" = "no" ; then
        error_exit "uuid required for VHDX support"
    fi
elif test "$vhdx" != "no" ; then
    if test "$uuid" = "yes" ; then
        vhdx=yes
    else
        vhdx=no
    fi
fi

##########################################
# xfsctl() probe, used for raw-posix
if test "$xfs" != "no" ; then
  cat > $TMPC << EOF
#include <stddef.h>  /* NULL */
#include <xfs/xfs.h>
int main(void)
{
    xfsctl(NULL, 0, 0, NULL);
    return 0;
}
EOF
  if compile_prog "" "" ; then
    xfs="yes"
  else
    if test "$xfs" = "yes" ; then
      feature_not_found "xfs" "Instal xfsprogs/xfslibs devel"
    fi
    xfs=no
  fi
fi

##########################################
# vde libraries probe
if test "$vde" != "no" ; then
  vde_libs="-lvdeplug"
  cat > $TMPC << EOF
#include <libvdeplug.h>
int main(void)
{
    struct vde_open_args a = {0, 0, 0};
    char s[] = "";
    vde_open(s, s, &a);
    return 0;
}
EOF
  if compile_prog "" "$vde_libs" ; then
    vde=yes
    libs_softmmu="$vde_libs $libs_softmmu"
    libs_tools="$vde_libs $libs_tools"
  else
    if test "$vde" = "yes" ; then
      feature_not_found "vde" "Install vde (Virtual Distributed Ethernet) devel"
    fi
    vde=no
  fi
fi

##########################################
# netmap support probe
# Apart from looking for netmap headers, we make sure that the host API version
# supports the netmap backend (>=11). The upper bound (15) is meant to simulate
# a minor/major version number. Minor new features will be marked with values up
# to 15, and if something happens that requires a change to the backend we will
# move above 15, submit the backend fixes and modify this two bounds.
if test "$netmap" != "no" ; then
  cat > $TMPC << EOF
#include <inttypes.h>
#include <net/if.h>
#include <net/netmap.h>
#include <net/netmap_user.h>
#if (NETMAP_API < 11) || (NETMAP_API > 15)
#error
#endif
int main(void) { return 0; }
EOF
  if compile_prog "" "" ; then
    netmap=yes
  else
    if test "$netmap" = "yes" ; then
      feature_not_found "netmap"
    fi
    netmap=no
  fi
fi

##########################################
# libcap-ng library probe
if test "$cap_ng" != "no" ; then
  cap_libs="-lcap-ng"
  cat > $TMPC << EOF
#include <cap-ng.h>
int main(void)
{
    capng_capability_to_name(CAPNG_EFFECTIVE);
    return 0;
}
EOF
  if compile_prog "" "$cap_libs" ; then
    cap_ng=yes
    libs_tools="$cap_libs $libs_tools"
  else
    if test "$cap_ng" = "yes" ; then
      feature_not_found "cap_ng" "Install libcap-ng devel"
    fi
    cap_ng=no
  fi
fi

##########################################
# Sound support libraries probe

audio_drv_probe()
{
    drv=$1
    hdr=$2
    lib=$3
    exp=$4
    cfl=$5
        cat > $TMPC << EOF
#include <$hdr>
int main(void) { $exp }
EOF
    if compile_prog "$cfl" "$lib" ; then
        :
    else
        error_exit "$drv check failed" \
            "Make sure to have the $drv libs and headers installed."
    fi
}

audio_drv_list=`echo "$audio_drv_list" | sed -e 's/,/ /g'`
for drv in $audio_drv_list; do
    case $drv in
    alsa)
    audio_drv_probe $drv alsa/asoundlib.h -lasound \
        "return snd_pcm_close((snd_pcm_t *)0);"
    libs_softmmu="-lasound $libs_softmmu"
    ;;

    fmod)
    if test -z $fmod_lib || test -z $fmod_inc; then
        error_exit "You must specify path to FMOD library and headers" \
            "Example: --fmod-inc=/path/include/fmod --fmod-lib=/path/lib/libfmod-3.74.so"
    fi
    audio_drv_probe $drv fmod.h $fmod_lib "return FSOUND_GetVersion();" "-I $fmod_inc"
    libs_softmmu="$fmod_lib $libs_softmmu"
    ;;

    esd)
    audio_drv_probe $drv esd.h -lesd 'return esd_play_stream(0, 0, "", 0);'
    libs_softmmu="-lesd $libs_softmmu"
    audio_pt_int="yes"
    ;;

    pa)
    audio_drv_probe $drv pulse/mainloop.h "-lpulse" \
        "pa_mainloop *m = 0; pa_mainloop_free (m); return 0;"
    libs_softmmu="-lpulse $libs_softmmu"
    audio_pt_int="yes"
    ;;

    coreaudio)
      libs_softmmu="-framework CoreAudio $libs_softmmu"
    ;;

    dsound)
      libs_softmmu="-lole32 -ldxguid $libs_softmmu"
      audio_win_int="yes"
    ;;

    oss)
      libs_softmmu="$oss_lib $libs_softmmu"
    ;;

    sdl|wav)
    # XXX: Probes for CoreAudio, DirectSound, SDL(?)
    ;;

    winwave)
      libs_softmmu="-lwinmm $libs_softmmu"
      audio_win_int="yes"
    ;;

    *)
    echo "$audio_possible_drivers" | grep -q "\<$drv\>" || {
        error_exit "Unknown driver '$drv' selected" \
            "Possible drivers are: $audio_possible_drivers"
    }
    ;;
    esac
done

##########################################
# BrlAPI probe

if test "$brlapi" != "no" ; then
  brlapi_libs="-lbrlapi"
  cat > $TMPC << EOF
#include <brlapi.h>
#include <stddef.h>
int main( void ) { return brlapi__openConnection (NULL, NULL, NULL); }
EOF
  if compile_prog "" "$brlapi_libs" ; then
    brlapi=yes
    libs_softmmu="$brlapi_libs $libs_softmmu"
  else
    if test "$brlapi" = "yes" ; then
      feature_not_found "brlapi" "Install brlapi devel"
    fi
    brlapi=no
  fi
fi

##########################################
# curses probe
if test "$curses" != "no" ; then
  if test "$mingw32" = "yes" ; then
    curses_list="-lpdcurses"
  else
    curses_list="$($pkg_config --libs ncurses 2>/dev/null):-lncurses:-lcurses"
  fi
  curses_found=no
  cat > $TMPC << EOF
#include <curses.h>
int main(void) {
  const char *s = curses_version();
  resize_term(0, 0);
  return s != 0;
}
EOF
  IFS=:
  for curses_lib in $curses_list; do
    unset IFS
    if compile_prog "" "$curses_lib" ; then
      curses_found=yes
      libs_softmmu="$curses_lib $libs_softmmu"
      break
    fi
  done
  unset IFS
  if test "$curses_found" = "yes" ; then
    curses=yes
  else
    if test "$curses" = "yes" ; then
      feature_not_found "curses" "Install ncurses devel"
    fi
    curses=no
  fi
fi

##########################################
# curl probe
if test "$curl" != "no" ; then
  if $pkg_config libcurl --exists; then
    curlconfig="$pkg_config libcurl"
  else
    curlconfig=curl-config
  fi
  cat > $TMPC << EOF
#include <curl/curl.h>
int main(void) { curl_easy_init(); curl_multi_setopt(0, 0, 0); return 0; }
EOF
  curl_cflags=`$curlconfig --cflags 2>/dev/null`
  curl_libs=`$curlconfig --libs 2>/dev/null`
  if compile_prog "$curl_cflags" "$curl_libs" ; then
    curl=yes
  else
    if test "$curl" = "yes" ; then
      feature_not_found "curl" "Install libcurl devel"
    fi
    curl=no
  fi
fi # test "$curl"

##########################################
# bluez support probe
if test "$bluez" != "no" ; then
  cat > $TMPC << EOF
#include <bluetooth/bluetooth.h>
int main(void) { return bt_error(0); }
EOF
  bluez_cflags=`$pkg_config --cflags bluez 2> /dev/null`
  bluez_libs=`$pkg_config --libs bluez 2> /dev/null`
  if compile_prog "$bluez_cflags" "$bluez_libs" ; then
    bluez=yes
    libs_softmmu="$bluez_libs $libs_softmmu"
  else
    if test "$bluez" = "yes" ; then
      feature_not_found "bluez" "Install bluez-libs/libbluetooth devel"
    fi
    bluez="no"
  fi
fi

##########################################
# glib support probe

if test "$mingw32" = yes; then
    # g_poll is required in order to integrate with the glib main loop.
    glib_req_ver=2.20
else
    glib_req_ver=2.12
fi
glib_modules=gthread-2.0
if test "$modules" = yes; then
    glib_modules="$glib_modules gmodule-2.0"
fi

for i in $glib_modules; do
    if $pkg_config --atleast-version=$glib_req_ver $i; then
        glib_cflags=`$pkg_config --cflags $i`
        glib_libs=`$pkg_config --libs $i`
        CFLAGS="$glib_cflags $CFLAGS"
        LIBS="$glib_libs $LIBS"
        libs_qga="$glib_libs $libs_qga"
    else
        error_exit "glib-$glib_req_ver $i is required to compile QEMU"
    fi
done

##########################################
# SHA command probe for modules
if test "$modules" = yes; then
    shacmd_probe="sha1sum sha1 shasum"
    for c in $shacmd_probe; do
        if which $c >/dev/null 2>&1; then
            shacmd="$c"
            break
        fi
    done
    if test "$shacmd" = ""; then
        error_exit "one of the checksum commands is required to enable modules: $shacmd_probe"
    fi
fi

##########################################
# pixman support probe

if test "$pixman" = ""; then
  if test "$want_tools" = "no" -a "$softmmu" = "no"; then
    pixman="none"
  elif $pkg_config pixman-1 > /dev/null 2>&1; then
    pixman="system"
  else
    pixman="internal"
  fi
fi
if test "$pixman" = "none"; then
  if test "$want_tools" != "no" -o "$softmmu" != "no"; then
    error_exit "pixman disabled but system emulation or tools build" \
        "enabled.  You can turn off pixman only if you also" \
        "disable all system emulation targets and the tools" \
        "build with '--disable-tools --disable-system'."
  fi
  pixman_cflags=
  pixman_libs=
elif test "$pixman" = "system"; then
  pixman_cflags=`$pkg_config --cflags pixman-1`
  pixman_libs=`$pkg_config --libs pixman-1`
else
  if test ! -d ${source_path}/pixman/pixman; then
    error_exit "pixman not present. Your options:" \
        "  (1) Preferred: Install the pixman devel package (any recent" \
        "      distro should have packages as Xorg needs pixman too)." \
        "  (2) Fetch the pixman submodule, using:" \
        "      git submodule update --init pixman"
  fi
  mkdir -p pixman/pixman
  pixman_cflags="-I\$(SRC_PATH)/pixman/pixman -I\$(BUILD_DIR)/pixman/pixman"
  pixman_libs="-L\$(BUILD_DIR)/pixman/pixman/.libs -lpixman-1"
fi

##########################################
# libcap probe

if test "$cap" != "no" ; then
  cat > $TMPC <<EOF
#include <stdio.h>
#include <sys/capability.h>
int main(void) { cap_t caps; caps = cap_init(); return caps != NULL; }
EOF
  if compile_prog "" "-lcap" ; then
    cap=yes
  else
    cap=no
  fi
fi

##########################################
# pthread probe
PTHREADLIBS_LIST="-pthread -lpthread -lpthreadGC2"

pthread=no
cat > $TMPC << EOF
#include <pthread.h>
static void *f(void *p) { return NULL; }
int main(void) {
  pthread_t thread;
  pthread_create(&thread, 0, f, 0);
  return 0;
}
EOF
if compile_prog "" "" ; then
  pthread=yes
else
  for pthread_lib in $PTHREADLIBS_LIST; do
    if compile_prog "" "$pthread_lib" ; then
      pthread=yes
      found=no
      for lib_entry in $LIBS; do
        if test "$lib_entry" = "$pthread_lib"; then
          found=yes
          break
        fi
      done
      if test "$found" = "no"; then
        LIBS="$pthread_lib $LIBS"
      fi
      break
    fi
  done
fi

if test "$mingw32" != yes -a "$pthread" = no; then
  error_exit "pthread check failed" \
      "Make sure to have the pthread libs and headers installed."
fi

# check for pthread_setname_np
pthread_setname_np=no
cat > $TMPC << EOF
#include <pthread.h>

static void *f(void *p) { return NULL; }
int main(void)
{
    pthread_t thread;
    pthread_create(&thread, 0, f, 0);
    pthread_setname_np(thread, "QEMU");
    return 0;
}
EOF
if compile_prog "" "$pthread_lib" ; then
  pthread_setname_np=yes
fi

##########################################
# rbd probe
if test "$rbd" != "no" ; then
  cat > $TMPC <<EOF
#include <stdio.h>
#include <rbd/librbd.h>
int main(void) {
    rados_t cluster;
    rados_create(&cluster, NULL);
    return 0;
}
EOF
  rbd_libs="-lrbd -lrados"
  if compile_prog "" "$rbd_libs" ; then
    rbd=yes
  else
    if test "$rbd" = "yes" ; then
      feature_not_found "rados block device" "Install librbd/ceph devel"
    fi
    rbd=no
  fi
fi

##########################################
# libssh2 probe
min_libssh2_version=1.2.8
if test "$libssh2" != "no" ; then
  if $pkg_config --atleast-version=$min_libssh2_version libssh2; then
    libssh2_cflags=`$pkg_config libssh2 --cflags`
    libssh2_libs=`$pkg_config libssh2 --libs`
    libssh2=yes
  else
    if test "$libssh2" = "yes" ; then
      error_exit "libssh2 >= $min_libssh2_version required for --enable-libssh2"
    fi
    libssh2=no
  fi
fi

##########################################
# libssh2_sftp_fsync probe

if test "$libssh2" = "yes"; then
  cat > $TMPC <<EOF
#include <stdio.h>
#include <libssh2.h>
#include <libssh2_sftp.h>
int main(void) {
    LIBSSH2_SESSION *session;
    LIBSSH2_SFTP *sftp;
    LIBSSH2_SFTP_HANDLE *sftp_handle;
    session = libssh2_session_init ();
    sftp = libssh2_sftp_init (session);
    sftp_handle = libssh2_sftp_open (sftp, "/", 0, 0);
    libssh2_sftp_fsync (sftp_handle);
    return 0;
}
EOF
  # libssh2_cflags/libssh2_libs defined in previous test.
  if compile_prog "$libssh2_cflags" "$libssh2_libs" ; then
    QEMU_CFLAGS="-DHAS_LIBSSH2_SFTP_FSYNC $QEMU_CFLAGS"
  fi
fi

##########################################
# linux-aio probe

if test "$linux_aio" != "no" ; then
  cat > $TMPC <<EOF
#include <libaio.h>
#include <sys/eventfd.h>
#include <stddef.h>
int main(void) { io_setup(0, NULL); io_set_eventfd(NULL, 0); eventfd(0, 0); return 0; }
EOF
  if compile_prog "" "-laio" ; then
    linux_aio=yes
  else
    if test "$linux_aio" = "yes" ; then
      feature_not_found "linux AIO" "Install libaio devel"
    fi
    linux_aio=no
  fi
fi

##########################################
# TPM passthrough is only on x86 Linux

if test "$targetos" = Linux && test "$cpu" = i386 -o "$cpu" = x86_64; then
  tpm_passthrough=$tpm
else
  tpm_passthrough=no
fi

##########################################
# adjust virtio-blk-data-plane based on linux-aio

if test "$virtio_blk_data_plane" = "yes" -a \
	"$linux_aio" != "yes" ; then
  error_exit "virtio-blk-data-plane requires Linux AIO, please try --enable-linux-aio"
elif test -z "$virtio_blk_data_plane" ; then
  virtio_blk_data_plane=$linux_aio
fi

##########################################
# attr probe

if test "$attr" != "no" ; then
  cat > $TMPC <<EOF
#include <stdio.h>
#include <sys/types.h>
#ifdef CONFIG_LIBATTR
#include <attr/xattr.h>
#else
#include <sys/xattr.h>
#endif
int main(void) { getxattr(NULL, NULL, NULL, 0); setxattr(NULL, NULL, NULL, 0, 0); return 0; }
EOF
  if compile_prog "" "" ; then
    attr=yes
  # Older distros have <attr/xattr.h>, and need -lattr:
  elif compile_prog "-DCONFIG_LIBATTR" "-lattr" ; then
    attr=yes
    LIBS="-lattr $LIBS"
    libattr=yes
  else
    if test "$attr" = "yes" ; then
      feature_not_found "ATTR" "Install libc6 or libattr devel"
    fi
    attr=no
  fi
fi

##########################################
# iovec probe
cat > $TMPC <<EOF
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
int main(void) { return sizeof(struct iovec); }
EOF
iovec=no
if compile_prog "" "" ; then
  iovec=yes
fi

##########################################
# preadv probe
cat > $TMPC <<EOF
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
int main(void) { return preadv(0, 0, 0, 0); }
EOF
preadv=no
if compile_prog "" "" ; then
  preadv=yes
fi

##########################################
# fdt probe
# fdt support is mandatory for at least some target architectures,
# so insist on it if we're building those system emulators.
fdt_required=no
for target in $target_list; do
  case $target in
    aarch64*-softmmu|arm*-softmmu|ppc*-softmmu|microblaze*-softmmu)
      fdt_required=yes
    ;;
  esac
done

if test "$fdt_required" = "yes"; then
  if test "$fdt" = "no"; then
    error_exit "fdt disabled but some requested targets require it." \
      "You can turn off fdt only if you also disable all the system emulation" \
      "targets which need it (by specifying a cut down --target-list)."
  fi
  fdt=yes
fi

if test "$fdt" != "no" ; then
  fdt_libs="-lfdt"
  # explicitly check for libfdt_env.h as it is missing in some stable installs
  cat > $TMPC << EOF
#include <libfdt_env.h>
int main(void) { return 0; }
EOF
  if compile_prog "" "$fdt_libs" ; then
    # system DTC is good - use it
    fdt=yes
  elif test -d ${source_path}/dtc/libfdt ; then
    # have submodule DTC - use it
    fdt=yes
    dtc_internal="yes"
    mkdir -p dtc
    if [ "$pwd_is_source_path" != "y" ] ; then
       symlink "$source_path/dtc/Makefile" "dtc/Makefile"
       symlink "$source_path/dtc/scripts" "dtc/scripts"
    fi
    fdt_cflags="-I\$(SRC_PATH)/dtc/libfdt"
    fdt_libs="-L\$(BUILD_DIR)/dtc/libfdt $fdt_libs"
  elif test "$fdt" = "yes" ; then
    # have neither and want - prompt for system/submodule install
    error_exit "DTC (libfdt) not present. Your options:" \
        "  (1) Preferred: Install the DTC (libfdt) devel package" \
        "  (2) Fetch the DTC submodule, using:" \
        "      git submodule update --init dtc"
  else
    # don't have and don't want
    fdt_libs=
    fdt=no
  fi
fi

libs_softmmu="$libs_softmmu $fdt_libs"

##########################################
# GLX probe, used by milkymist-tmu2
if test "$glx" != "no" ; then
  glx_libs="-lGL -lX11"
  cat > $TMPC << EOF
#include <X11/Xlib.h>
#include <GL/gl.h>
#include <GL/glx.h>
int main(void) { glBegin(0); glXQueryVersion(0,0,0); return 0; }
EOF
  if compile_prog "" "-lGL -lX11" ; then
    glx=yes
  else
    if test "$glx" = "yes" ; then
      feature_not_found "glx" "Install GL devel (e.g. MESA)"
    fi
    glx_libs=
    glx=no
  fi
fi

##########################################
# glusterfs probe
if test "$glusterfs" != "no" ; then
  if $pkg_config --atleast-version=3 glusterfs-api; then
    glusterfs="yes"
    glusterfs_cflags=`$pkg_config --cflags glusterfs-api`
    glusterfs_libs=`$pkg_config --libs glusterfs-api`
    if $pkg_config --atleast-version=5 glusterfs-api; then
      glusterfs_discard="yes"
    fi
    if $pkg_config --atleast-version=6 glusterfs-api; then
      glusterfs_zerofill="yes"
    fi
  else
    if test "$glusterfs" = "yes" ; then
      feature_not_found "GlusterFS backend support" "Install glusterfs-api devel"
    fi
    glusterfs="no"
  fi
fi

# Check for inotify functions when we are building linux-user
# emulator.  This is done because older glibc versions don't
# have syscall stubs for these implemented.  In that case we
# don't provide them even if kernel supports them.
#
inotify=no
cat > $TMPC << EOF
#include <sys/inotify.h>

int
main(void)
{
	/* try to start inotify */
	return inotify_init();
}
EOF
if compile_prog "" "" ; then
  inotify=yes
fi

inotify1=no
cat > $TMPC << EOF
#include <sys/inotify.h>

int
main(void)
{
    /* try to start inotify */
    return inotify_init1(0);
}
EOF
if compile_prog "" "" ; then
  inotify1=yes
fi

# check if utimensat and futimens are supported
utimens=no
cat > $TMPC << EOF
#define _ATFILE_SOURCE
#include <stddef.h>
#include <fcntl.h>
#include <sys/stat.h>

int main(void)
{
    utimensat(AT_FDCWD, "foo", NULL, 0);
    futimens(0, NULL);
    return 0;
}
EOF
if compile_prog "" "" ; then
  utimens=yes
fi

# check if pipe2 is there
pipe2=no
cat > $TMPC << EOF
#include <unistd.h>
#include <fcntl.h>

int main(void)
{
    int pipefd[2];
    return pipe2(pipefd, O_CLOEXEC);
}
EOF
if compile_prog "" "" ; then
  pipe2=yes
fi

# check if accept4 is there
accept4=no
cat > $TMPC << EOF
#include <sys/socket.h>
#include <stddef.h>

int main(void)
{
    accept4(0, NULL, NULL, SOCK_CLOEXEC);
    return 0;
}
EOF
if compile_prog "" "" ; then
  accept4=yes
fi

# check if tee/splice is there. vmsplice was added same time.
splice=no
cat > $TMPC << EOF
#include <unistd.h>
#include <fcntl.h>
#include <limits.h>

int main(void)
{
    int len, fd = 0;
    len = tee(STDIN_FILENO, STDOUT_FILENO, INT_MAX, SPLICE_F_NONBLOCK);
    splice(STDIN_FILENO, NULL, fd, NULL, len, SPLICE_F_MOVE);
    return 0;
}
EOF
if compile_prog "" "" ; then
  splice=yes
fi

##########################################
# signalfd probe
signalfd="no"
cat > $TMPC << EOF
#include <unistd.h>
#include <sys/syscall.h>
#include <signal.h>
int main(void) { return syscall(SYS_signalfd, -1, NULL, _NSIG / 8); }
EOF

if compile_prog "" "" ; then
  signalfd=yes
fi

# check if eventfd is supported
eventfd=no
cat > $TMPC << EOF
#include <sys/eventfd.h>

int main(void)
{
    return eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
}
EOF
if compile_prog "" "" ; then
  eventfd=yes
fi

# check for fallocate
fallocate=no
cat > $TMPC << EOF
#include <fcntl.h>

int main(void)
{
    fallocate(0, 0, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  fallocate=yes
fi

# check for fallocate hole punching
fallocate_punch_hole=no
cat > $TMPC << EOF
#include <fcntl.h>
#include <linux/falloc.h>

int main(void)
{
    fallocate(0, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  fallocate_punch_hole=yes
fi

# check for sync_file_range
sync_file_range=no
cat > $TMPC << EOF
#include <fcntl.h>

int main(void)
{
    sync_file_range(0, 0, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  sync_file_range=yes
fi

# check for linux/fiemap.h and FS_IOC_FIEMAP
fiemap=no
cat > $TMPC << EOF
#include <sys/ioctl.h>
#include <linux/fs.h>
#include <linux/fiemap.h>

int main(void)
{
    ioctl(0, FS_IOC_FIEMAP, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  fiemap=yes
fi

# check for dup3
dup3=no
cat > $TMPC << EOF
#include <unistd.h>

int main(void)
{
    dup3(0, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  dup3=yes
fi

# check for ppoll support
ppoll=no
cat > $TMPC << EOF
#include <poll.h>

int main(void)
{
    struct pollfd pfd = { .fd = 0, .events = 0, .revents = 0 };
    ppoll(&pfd, 1, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  ppoll=yes
fi

# check for prctl(PR_SET_TIMERSLACK , ... ) support
prctl_pr_set_timerslack=no
cat > $TMPC << EOF
#include <sys/prctl.h>

int main(void)
{
    prctl(PR_SET_TIMERSLACK, 1, 0, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  prctl_pr_set_timerslack=yes
fi

# check for epoll support
epoll=no
cat > $TMPC << EOF
#include <sys/epoll.h>

int main(void)
{
    epoll_create(0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  epoll=yes
fi

# epoll_create1 and epoll_pwait are later additions
# so we must check separately for their presence
epoll_create1=no
cat > $TMPC << EOF
#include <sys/epoll.h>

int main(void)
{
    /* Note that we use epoll_create1 as a value, not as
     * a function being called. This is necessary so that on
     * old SPARC glibc versions where the function was present in
     * the library but not declared in the header file we will
     * fail the configure check. (Otherwise we will get a compiler
     * warning but not an error, and will proceed to fail the
     * qemu compile where we compile with -Werror.)
     */
    return (int)(uintptr_t)&epoll_create1;