From: Roland McGrath <roland@redhat.com>
Date: Fri, 23 Jan 2009 11:23:02 +0000 (-0800)
Subject: (__thread check): Use AC_LINK_IFELSE, in case of building with compiler support but... 
X-Git-Tag: elfutils-0.140~25^2~6
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8181739c44410da185ca2da897e0cc9fb2361c87;p=thirdparty%2Felfutils.git

(__thread check): Use AC_LINK_IFELSE, in case of building with compiler support but no working runtime support.
---

diff --git a/ChangeLog b/ChangeLog
index b1fb5b99c..c9b6888eb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2009-01-23  Roland McGrath  <roland@redhat.com>
+
+	* configure.ac (__thread check): Use AC_LINK_IFELSE, in case of
+	building with compiler support but no working runtime support.
+
 2009-01-22  Ulrich Drepper  <drepper@redhat.com>
 
 	* Makefile.am (rpm): The tarball is now bzip2-compressed.
diff --git a/configure.ac b/configure.ac
index 3dcabbe14..657bf5011 100644
--- a/configure.ac
+++ b/configure.ac
@@ -74,12 +74,13 @@ CFLAGS="$old_CFLAGS"])
 AS_IF([test "x$ac_cv_c99" != xyes],
       AC_MSG_ERROR([gcc with C99 support required]))
 
-AC_CACHE_CHECK([for gcc with TLS support], ac_cv_tls, [dnl
-AC_COMPILE_IFELSE([dnl
-__thread int a; int foo (int b) { return a + b; }],
-		  ac_cv_tls=yes, ac_cv_tls=no)])
+AC_CACHE_CHECK([for __thread support], ac_cv_tls, [dnl
+AC_LINK_IFELSE([dnl
+AC_LANG_PROGRAM([[static __thread int a; int foo (int b) { return a + b; }]],
+		[[exit (foo (0));]])],
+	       ac_cv_tls=yes, ac_cv_tls=no)])
 AS_IF([test "x$ac_cv_tls" != xyes],
-      AC_MSG_ERROR([gcc with TLS support required]))
+      AC_MSG_ERROR([__thread support required]))
 
 LOCALEDIR=$datadir
 AC_SUBST(LOCALEDIR)