From 25f3b862309e7accdd59c55b01effecbe2316b23 Mon Sep 17 00:00:00 2001
From: alexpeshkoff <alexpeshkoff@users.sourceforge.net>
Date: Fri, 3 Apr 2009 09:14:12 +0000
Subject: [PATCH] A better way to check for __thread

---
 configure.in | 21 +++------------------
 1 file changed, 3 insertions(+), 18 deletions(-)

diff --git a/configure.in b/configure.in
index 8bce8a518f..8f334b6513 100644
--- a/configure.in
+++ b/configure.in
@@ -843,25 +843,10 @@ case "$PLATFORM" in
 esac
 
 dnl Detect support for ISO syntax for thread-locals
-AC_CACHE_CHECK([for __thread], firebird_cv_gcc___thread,
-  [cat > conftest.c <<\EOF
-__thread int a = 42;
-main() {
-	a = a + 1;
-	return 0;
-}
-EOF
-if AC_TRY_COMMAND([gcc -fPIC -o conftest conftest.c >&AS_MESSAGE_LOG_FD && ./conftest]); then
-  firebird_cv_gcc___thread=yes
-else
-  firebird_cv_gcc___thread=no
-fi
-rm -f conftest*])
+AC_COMPILE_IFELSE(
+  [AC_LANG_PROGRAM([[__thread int a = 42;]],[[a = a + 1;]])],
+  AC_DEFINE(HAVE___THREAD, 1, [Define it if compiler supports ISO syntax for thread-local storage]),)
 
-if test "$firebird_cv_gcc___thread" = yes; then
-  AC_DEFINE(HAVE___THREAD, 1, [Define it if compiler supports ISO syntax for thread-local storage])
-fi
-				  
 dnl ##################### DO NOT ADD ANY TESTS BELOW ###########################
 
 AC_SUBST(SFIO_DIR)