diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 66ed2a6..b7ff615 100644 --- a/configure.ac +++ b/configure.ac @@ -42,8 +42,27 @@ AC_PROG_LIBTOOL() if test "x$GCC" = "xyes" ; then CFLAGS="$CFLAGS -pipe -W -Wall -pedantic" + # Test whether sys/signal.h can be included when compiled with -std=c99 + AC_MSG_CHECKING([checking whether sys/signal.h can be included with -std=c99]) + OLDCFLAGS="$CFLAGS" + CFLAGS="-std=c99" + AC_TRY_COMPILE([#include <sys/signal.h>], + [int main(void) { + struct sigaction sa; + sa.sa_handler = 0; + return 0; + };], use_stdc99=yes, use_stdc99=no) + + if test x"$use_stdc99" = xyes; then + CFLAGS="-std=c99 $OLDCFLAGS" + AC_MSG_RESULT([yes]) + else + AC_MSG_RESULT([no]) + CFLAGS="$OLDCFLAGS" + fi + AC_LANG_CONFTEST([int main() {}]) - $CC -c conftest.c -std=c99 -Wno-unused-parameter $CFLAGS > /dev/null 2> /dev/null && CFLAGS="$CFLAGS -std=c99 -Wno-unused-parameter" + $CC -c conftest.c -Wno-unused-parameter $CFLAGS > /dev/null 2> /dev/null && CFLAGS="$CFLAGS -Wno-unused-parameter" rm -f conftest.o fi |