compiler: add macro for GCC weak symbols
This lets us provide a default implementation of a symbol which targets can
override.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/compiler.h b/compiler.h
index 736e770..f76921e 100644
--- a/compiler.h
+++ b/compiler.h
@@ -45,6 +45,7 @@
# define GCC_ATTR __attribute__((__unused__, format(gnu_printf, 1, 2)))
# define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m)))
# endif
+#define GCC_WEAK __attribute__((weak))
#else
#define GCC_ATTR /**/
#define GCC_FMT_ATTR(n, m)
