diff options
Diffstat (limited to 'm4/add_cflags.m4')
| -rw-r--r-- | m4/add_cflags.m4 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/m4/add_cflags.m4 b/m4/add_cflags.m4 new file mode 100644 index 0000000..d9b633c --- /dev/null +++ b/m4/add_cflags.m4 @@ -0,0 +1,15 @@ +dnl @synopsis XIPH_ADD_CFLAGS +dnl +dnl Add the given option to CFLAGS, if it doesn't break the compiler + +AC_DEFUN([XIPH_ADD_CFLAGS], +[AC_MSG_CHECKING([if $CC accepts $1]) + ac_add_cflags__old_cflags="$CFLAGS" + CFLAGS="$1" + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ + #include <stdio.h> + ]], [[puts("Hello, World!"); return 0;]])],[AC_MSG_RESULT(yes) + CFLAGS="$ac_add_cflags__old_cflags $1"],[AC_MSG_RESULT(no) + CFLAGS="$ac_add_cflags__old_cflags" + ]) +])# XIPH_ADD_CFLAGS |