diff options
| author | Thomas Haller <thaller@redhat.com> | 2015-02-24 18:11:21 +0100 |
|---|---|---|
| committer | Thomas Haller <thaller@redhat.com> | 2015-05-18 23:40:01 +0200 |
| commit | c090c3a3319b657b323dd2a3e681961e94ce1346 (patch) | |
| tree | 878c0d2d3ab6b0baaca181ede61c8ef26f4576ea | |
| parent | 0d107804a447b8ce959fe90ea72667e234531b15 (diff) | |
| download | network-manager-applet-c090c3a3319b657b323dd2a3e681961e94ce1346.tar.gz | |
build: fix detecting support for -Wno-* compiler flags
Since GCC 4.4, gcc does not warn about unknown -Wno-* flags. At
least, it does not warning unless another warning is raised as well
(https://gcc.gnu.org/wiki/FAQ#wnowarning).
We didn't notice up to now, because we only tested flags that GCC
actually supports.
Hack around this, by checking for the -W* counterpart instead.
Taken from NetworkManager, commit 0462104317bfc097a90707a13590248707324846.
| -rw-r--r-- | m4/compiler_warnings.m4 | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/m4/compiler_warnings.m4 b/m4/compiler_warnings.m4 index 3fe8293a..97897e44 100644 --- a/m4/compiler_warnings.m4 +++ b/m4/compiler_warnings.m4 @@ -30,7 +30,8 @@ if test "$GCC" = "yes" -a "$set_more_warnings" != "no"; then -Wundef -Wimplicit-function-declaration \ -Wpointer-arith -Winit-self \ -Wmissing-include-dirs -Waggregate-return; do - CFLAGS="$CFLAGS_MORE_WARNINGS $CFLAGS_EXTRA $option $CFLAGS_SAVED" + dnl GCC 4.4 does not warn when checking for -Wno-* flags (https://gcc.gnu.org/wiki/FAQ#wnowarning) + CFLAGS="$CFLAGS_MORE_WARNINGS $CFLAGS_EXTRA $(printf '%s' "$option" | sed 's/^-Wno-/-W/') $CFLAGS_SAVED" AC_MSG_CHECKING([whether gcc understands $option]) AC_TRY_COMPILE([], [], has_option=yes, |