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From c8ccdbfe1e45cb3b832109d644296c0a3b3e0b59 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 2 Sep 2018 03:49:31 +0000
Subject: [PATCH] configure.ac: -fstack-protector-strong

* configure.ac: use -fstack-protector-strong if available instead of
  -fstack-protector conditionally.  [ruby-core:88788] [Misc #15053]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64614 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 configure.ac | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/configure.ac b/configure.ac
index 9328fa532de0..b8ee57239215 100644
--- a/configure.ac
+++ b/configure.ac
@@ -837,15 +837,18 @@ AS_IF([test "$GCC" = yes], [
 	stack_protector=no
     ])
     AS_IF([test -z "${stack_protector+set}"], [
-	RUBY_TRY_CFLAGS(-fstack-protector, [stack_protector=yes], [stack_protector=no])
-	AS_IF([test "x$stack_protector" = xyes], [
-	    RUBY_TRY_LDFLAGS(-fstack-protector, [], [stack_protector=broken])
+	AS_FOR(option, opt, [-fstack-protector-strong -fstack-protector], [
+	    RUBY_TRY_CFLAGS(option, [stack_protector=yes])
+	    AS_IF([test "x$stack_protector" = xyes], [
+		RUBY_TRY_LDFLAGS(option, [], [stack_protector=])
+	    ])
+	    AS_IF([test "x$stack_protector" = xyes], [stack_protector=option; break])
 	])
     ])
-    AS_IF([test "x$stack_protector" = xyes], [
-	RUBY_APPEND_OPTION(XCFLAGS, -fstack-protector)
-	RUBY_APPEND_OPTION(XLDFLAGS, -fstack-protector)
-	RUBY_APPEND_OPTION(LDFLAGS, -fstack-protector)
+    AS_CASE(["$stack_protector"], [-*], [
+	RUBY_APPEND_OPTION(XCFLAGS, $stack_protector)
+	RUBY_APPEND_OPTION(XLDFLAGS, $stack_protector)
+	RUBY_APPEND_OPTION(LDFLAGS, $stack_protector)
     ])
 
     AS_CASE("${compress_debug_sections:-zlib}",