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configure: Disable the unused result warnings when Fortify is enabled.

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Alexandre Julliard 2010-07-24 11:42:59 +02:00
parent f31428e107
commit 83676d721f
2 changed files with 68 additions and 0 deletions
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57
configure vendored
View file

@ -11875,6 +11875,63 @@ $as_echo "$ac_cv_c_string_h_warnings" >&6; }
EXTRACFLAGS="$EXTRACFLAGS -Wpointer-arith"
fi
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror"
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for broken unused result warnings" >&5
$as_echo_n "checking for broken unused result warnings... " >&6; }
if test "${ac_cv_c_unused_result_warnings+set}" = set; then :
$as_echo_n "(cached) " >&6
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <unistd.h>
int
main ()
{
write(2,"a",1)
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ac_cv_c_unused_result_warnings=no
else
ac_cv_c_unused_result_warnings=yes
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_unused_result_warnings" >&5
$as_echo "$ac_cv_c_unused_result_warnings" >&6; }
CFLAGS="$saved_CFLAGS"
if test "$ac_cv_c_unused_result_warnings" = "yes"
then
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports -Wno-unused-result" >&5
$as_echo_n "checking whether the compiler supports -Wno-unused-result... " >&6; }
if test "${ac_cv_cflags__Wno_unused_result+set}" = set; then :
$as_echo_n "(cached) " >&6
else
ac_wine_try_cflags_saved=$CFLAGS
CFLAGS="$CFLAGS -Wno-unused-result"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int main(int argc, char **argv) { return 0; }
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :
ac_cv_cflags__Wno_unused_result=yes
else
ac_cv_cflags__Wno_unused_result=no
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
CFLAGS=$ac_wine_try_cflags_saved
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_cflags__Wno_unused_result" >&5
$as_echo "$ac_cv_cflags__Wno_unused_result" >&6; }
if test $ac_cv_cflags__Wno_unused_result = yes; then :
EXTRACFLAGS="$EXTRACFLAGS -Wno-unused-result"
fi
fi
if test "x$enable_maintainer_mode" = "xyes"
then
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports -Werror" >&5

11
configure.ac
View file

@ -1604,6 +1604,17 @@ then
EXTRACFLAGS="$EXTRACFLAGS -Wpointer-arith"
fi
dnl Fortify enables unused result warnings on a gazillion functions, making it useless
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror"
AC_CACHE_CHECK([for broken unused result warnings], ac_cv_c_unused_result_warnings,
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <unistd.h>]], [[write(2,"a",1)]])],[ac_cv_c_unused_result_warnings=no],[ac_cv_c_unused_result_warnings=yes]))
CFLAGS="$saved_CFLAGS"
if test "$ac_cv_c_unused_result_warnings" = "yes"
then
WINE_TRY_CFLAGS([-Wno-unused-result])
fi
dnl Enable -Werror for maintainer mode
if test "x$enable_maintainer_mode" = "xyes"
then