From 6bd18b0b7b4d916e474ba84707eb784a643b3e71 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Sun, 23 Feb 2020 16:23:20 +0100
Subject: [PATCH] configure.ac: fix stack-protector detection

Use AC_LINK_IFELSE instead of AC_COMPILE_IFELSE to check for
stack-protector availability as some compilers could missed the needed
library (-lssp or -lssp_nonshared) at linking step:

/home/giuliobenetti/autobuild/run/instance-3/output-1/host/bin/x86_64-linux-g++  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os   -Wall -W -Wformat=2 -fstack-protector-strong   -o smartctl smartctl.o atacmdnames.o atacmds.o ataidentify.o ataprint.o dev_ata_cmd_set.o dev_intelliprop.o dev_interface.o dev_jmb39x_raid.o json.o knowndrives.o nvmecmds.o nvmeprint.o scsicmds.o scsiata.o scsinvme.o scsiprint.o utility.o     os_linux.o cciss.o dev_areca.o    -lselinux
/home/giuliobenetti/autobuild/run/instance-3/output-1/host/opt/ext-toolchain/bin/../lib/gcc/x86_64-buildroot-linux-uclibc/8.3.0/../../../../x86_64-buildroot-linux-uclibc/bin/ld: cannot find -lssp_nonshared
/home/giuliobenetti/autobuild/run/instance-3/output-1/host/opt/ext-toolchain/bin/../lib/gcc/x86_64-buildroot-linux-uclibc/8.3.0/../../../../x86_64-buildroot-linux-uclibc/bin/ld: cannot find -lssp

Fixes:
 - http://autobuild.buildroot.org/results/0de9f2a69fa2a39164211299f8a429d2fec6935a

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Upstream status: https://www.smartmontools.org/ticket/1302]
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 87470d8a..ccb457e1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -770,7 +770,7 @@ if test "$GXX" = "yes"; then
     AC_MSG_CHECKING([whether $CXX supports $option])
     save_CXXFLAGS=$CXXFLAGS
     CXXFLAGS="$CXXFLAGS $option"
-    AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [res=yes], [res=no; CXXFLAGS=$save_CXXFLAGS])
+    AC_LINK_IFELSE([AC_LANG_PROGRAM()], [res=yes], [res=no; CXXFLAGS=$save_CXXFLAGS])
     AC_MSG_RESULT([$res])
   done
 else
-- 
2.25.0