------------------------------------------------------------
revno: 12603
revision-id: squid3@treenet.co.nz-20130908220521-ml7j5notql4veufq
parent: squid3@treenet.co.nz-20130726124339-q1htcokoidza95pa
committer: Amos Jeffries <squid3@treenet.co.nz>
branch nick: 3.3
timestamp: Sun 2013-09-08 16:05:21 -0600
message:
  Windows: fix detection of GNU atomic operations
  
  On MinGW the GNU atomic operations symbols are defined but do not work.
  We require a run-time test to detect problems. Not just a compiler check.
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# Bazaar merge directive format 2 (Bazaar 0.90)
# revision_id: squid3@treenet.co.nz-20130908220521-ml7j5notql4veufq
# target_branch: http://bzr.squid-cache.org/bzr/squid3/3.3
# testament_sha1: b3480fbb806ee064dd71e190c03500a44dd85037
# timestamp: 2013-09-08 22:53:31 +0000
# source_branch: http://bzr.squid-cache.org/bzr/squid3/3.3
# base_revision_id: squid3@treenet.co.nz-20130726124339-\
#   q1htcokoidza95pa
# 
# Begin patch
=== modified file 'configure.ac'
--- configure.ac	2013-07-13 13:24:45 +0000
+++ configure.ac	2013-09-08 22:05:21 +0000
@@ -391,8 +391,8 @@
 dnl
 dnl Check for atomic operations support in the compiler
 dnl
-AC_MSG_CHECKING([for atomic operations support])
-AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+AC_MSG_CHECKING([for GNU atomic operations support])
+AC_RUN_IFELSE([AC_LANG_PROGRAM([[
     int n = 0;
 ]],[[
     __sync_add_and_fetch(&n, 10); // n becomes 10
@@ -403,8 +403,7 @@
     return (n == 200) ? 0 : -1;
 ]])],
 [
-    AC_DEFINE(HAVE_ATOMIC_OPS,1,
-        [Define to 1 if you have __sync_add_and_fetch() and such])
+    AC_DEFINE(HAVE_ATOMIC_OPS,1,[Define to 1 if you have __sync_add_and_fetch() and such])
     AC_MSG_RESULT(yes)
 ],[
     AC_MSG_RESULT(no)