Explicitly test for 'static weakref' support.

Since we use 'static' weakref symbols, and not all GCC versions support them,
test for that combination explicitly.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@201137 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configure

@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.ac Revision: 200985 .
+# From configure.ac Revision: 201090 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.63 for asterisk 1.6.
 #
@@ -18937,7 +18937,7 @@ _ACEOF
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
- void __attribute__((weakref)) *test(void *muffin, ...) {return (void *) 0;}
+static void __attribute__((weakref)) *test(void *muffin, ...) {return (void *) 0;}
 int
 main ()
 {
@@ -18988,7 +18988,7 @@ _ACEOF
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
- void __attribute__((weakref("foo"))) *test(void *muffin, ...) {return (void *) 0;}
+static void __attribute__((weakref("foo"))) *test(void *muffin, ...) {return (void *) 0;}
 int
 main ()
 {

configure.ac

@@ -514,7 +514,7 @@ AST_GCC_ATTRIBUTE(always_inline)
 AST_GCC_ATTRIBUTE(deprecated)
 AST_GCC_ATTRIBUTE(sentinel)
 AST_GCC_ATTRIBUTE(warn_unused_result)
-AST_GCC_ATTRIBUTE(weakref, [weakref("foo")])
+AST_GCC_ATTRIBUTE(weakref, [weakref("foo")], static)
 AST_GCC_ATTRIBUTE(weak_import)
 
 AC_MSG_CHECKING(for -ffunction-sections support)