[commit: ghc] ghc-7.8: Fix __thread detection (#8722) (744493d)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : ghc-7.8
Link       : http://ghc.haskell.org/trac/ghc/changeset/744493db1399e9db02b151fc79066f005f5a7e46/ghc

>---------------------------------------------------------------

commit 744493db1399e9db02b151fc79066f005f5a7e46
Author: Peter Trommler <ptrommler at acm.org>
Date:   Thu Feb 6 22:57:34 2014 -0600

    Fix __thread detection (#8722)
    
    Signed-off-by: Austin Seipp <austin at well-typed.com>
    
    (cherry picked from commit 298a25bdfd02bb591fde2dd0590bd7af81a91b94)


>---------------------------------------------------------------

744493db1399e9db02b151fc79066f005f5a7e46
 configure.ac |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 70749b1..1c58da0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -867,11 +867,11 @@ AC_COMPILE_IFELSE(
   [ AC_LANG_SOURCE([[__thread int tester = 0;]]) ],
   [
    AC_MSG_RESULT(yes)
-   AC_DEFINE([CC_SUPPORTS_TLS],[0],[Define to 1 if __thread is supported])
+   AC_DEFINE([CC_SUPPORTS_TLS],[1],[Define to 1 if __thread is supported])
   ],
   [
    AC_MSG_RESULT(no)
-   AC_DEFINE([CC_SUPPORTS_TLS],[1],[Define to 1 if __thread is supported])
+   AC_DEFINE([CC_SUPPORTS_TLS],[0],[Define to 1 if __thread is supported])
   ])