From 3425b16d521b8846b95df2b7d32a548d93341f3b Mon Sep 17 00:00:00 2001
From: marha <marha@users.sourceforge.net>
Date: Sun, 14 Nov 2010 21:29:32 +0000
Subject: xserver pixman libX11 libXext 14/11/2010

---
 pixman/configure.ac | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'pixman/configure.ac')

diff --git a/pixman/configure.ac b/pixman/configure.ac
index ad975f494..d1265ab11 100644
--- a/pixman/configure.ac
+++ b/pixman/configure.ac
@@ -740,6 +740,33 @@ AC_SUBST(HAVE_PTHREAD_SETSPECIFIC)
 AC_SUBST(PTHREAD_LDFLAGS)
 AC_SUBST(PTHREAD_LIBS)
 
+dnl =====================================
+dnl __attribute__((constructor))
+
+support_for_attribute_constructor=no
+
+AC_MSG_CHECKING(for __attribute__((constructor)))
+AC_LINK_IFELSE([
+#if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7))
+/* attribute 'constructor' is supported since gcc 2.7, but some compilers
+ * may only pretend to be gcc, so let's try to actually use it
+ */
+static int x = 1;
+static void __attribute__((constructor)) constructor_function () { x = 0; }
+int main (void) { return x; }
+#else
+#error not gcc or gcc version is older than 2.7
+#endif
+], support_for_attribute_constructor=yes)
+
+if test x$support_for_attribute_constructor = xyes; then
+   AC_DEFINE([TOOLCHAIN_SUPPORTS_ATTRIBUTE_CONSTRUCTOR],
+             [],[Whether the tool chain supports __attribute__((constructor))])
+fi
+
+AC_MSG_RESULT($support_for_attribute_constructor)
+AC_SUBST(TOOLCHAIN_SUPPORTS_ATTRIBUTE_CONSTRUCTOR)
+
 AC_OUTPUT([pixman-1.pc
            pixman-1-uninstalled.pc
            Makefile
-- 
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