From 88a7271de4e6a8b32bbbaa83eca84bf71c888f65 Mon Sep 17 00:00:00 2001 From: shyouhei Date: Thu, 18 Oct 2018 09:21:05 +0000 Subject: configure.ac: do not overwrite -std= Set -std=gnu99 only when no such compiler flag(s) are set in any compiler-related environment variables. This enables users to specify something more modern, say, -std=c11. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65154 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- configure.ac | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'configure.ac') diff --git a/configure.ac b/configure.ac index e887ddd3bf..50247ca545 100644 --- a/configure.ac +++ b/configure.ac @@ -626,6 +626,9 @@ AS_IF([test "$GCC" = yes], [ ], [ # ANSI (no XCFLAGS because this is C only) + rb_tmp_std_check=`echo $CC $CFLAGS $optflags $warnflags $debugflags | fgrep std= | tr -d '\015'` + AS_IF([test "x$rb_tmp_std_check" = "x"], + [ for ansi_options in -std=gnu99; do RUBY_TRY_CFLAGS(${ansi_options}, [ RUBY_APPEND_OPTIONS(warnflags, ${ansi_options}) @@ -633,6 +636,7 @@ AS_IF([test "$GCC" = yes], [ ], [ansi_options=]) test "x${ansi_options}" = x || break done + ]) ]) # suppress annoying -Wstrict-overflow warnings -- cgit v1.2.3