Check if gcc supports -fvisibility=hidden before adding to CFLAGS

Signed-off-by: Alan Coopersmith <alan.coopersmith@sun.com>
This commit is contained in:
Alan Coopersmith 2010-01-16 18:34:23 -08:00
parent aec3fe82e4
commit adda7f3215

View file

@ -96,7 +96,14 @@ esac
dnl Add flags for gcc and g++
if test "x$GCC" = xyes; then
CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -std=c99 -ffast-math -fvisibility=hidden"
CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -std=c99 -ffast-math"
# Enable -fvisibility=hidden if using a gcc that supports it
save_CFLAGS="$CFLAGS"
AC_MSG_CHECKING([whether $(CC) supports -fvisibility=hidden])
CFLAGS="$CFLAGS -fvisibility=hidden"
AC_LINK_IFELSE([AC_LANG_PROGRAM()], AC_MSG_RESULT([yes]),
[CFLAGS="$save_CFLAGS" ; AC_MSG_RESULT([no])]);
# Work around aliasing bugs - developers should comment this out
CFLAGS="$CFLAGS -fno-strict-aliasing"