From 5c5a8b99cf96b71940e36a9db66d3a61bc315016 Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Mon, 7 Mar 2022 15:09:53 -0300 Subject: Disable use of -fsignaling-nans if compiler does not support it Reviewed-by: Fangrui Song --- configure.ac | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'configure.ac') diff --git a/configure.ac b/configure.ac index 973fe59e81..c5c4b383a3 100644 --- a/configure.ac +++ b/configure.ac @@ -1488,6 +1488,16 @@ if test -n "$submachine"; then fi AC_SUBST(libc_cv_cc_submachine) +dnl Determine if compiler supports -fsignaling-nans +AC_CACHE_CHECK([for compiler option that -fsignaling-nans], + libc_cv_cc_signaling_nans, [dnl +LIBC_TRY_CC_OPTION([-Werror -fsignaling-nans], + [libc_cv_cc_signaling_nans=-fsignaling-nans], + [libc_cv_cc_signaling_nans=]) +]) +LIBC_CONFIG_VAR([config-cflags-signaling-nans], + [$libc_cv_cc_signaling_nans]) + AC_CACHE_CHECK(if $CC accepts -fno-tree-loop-distribute-patterns with \ __attribute__ ((__optimize__)), libc_cv_cc_loop_to_function, [dnl cat > conftest.c <