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.

Patch provided by Fabrice Fontaine.

git-svn-id: https://svn.code.sf.net/p/smartmontools/code/trunk@5032 4ea69e1a-61f1-4043-bf83-b5c94c648137

smartmontools/ChangeLog

 $Id$
 
+2020-02-25  Fabrice Fontaine  <fontaine.fabrice@gmail.com>
+
+	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.
+
 2020-01-11  Christian Franke  <franke@computer.org>
 
 	dev_jmb39x_raid.cpp: Add '-d jmb39x-q,...' device type for JMB39x

smartmontools/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