Fix crashes on other platforms caused by interference from Darwin weak symbol support.

[asterisk/asterisk.git] / configure

diff --git a/configure b/configure
index a3c5fa2..bf41f7a 100755 (executable)
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
 #! /bin/sh

-# From configure.ac Revision: 338139 .
+# From configure.ac Revision: 339721 .

 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.63 for asterisk trunk.
 #
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.63 for asterisk trunk.
 #

@@ -22857,6 +22857,17 @@ CFLAGS="$saved_CFLAGS"
 
 
 
 
 
 

+# Support weak symbols on a platform specific basis.  The Mac OS X
+# (Darwin) support must be isolated from the other platforms because
+# it has caused other platforms to fail.
+#
+case "${OSARCH}" in
+       darwin*)
+       # Allow weak symbol support on Darwin platforms only because there
+       # is active community support for it.
+       # However, Darwin seems to break weak symbols for each new version.
+       #
+

 { $as_echo "$as_me:$LINENO: checking for compiler 'attribute weak_import' support" >&5
 $as_echo_n "checking for compiler 'attribute weak_import' support... " >&6; }
 saved_CFLAGS="$CFLAGS"
 { $as_echo "$as_me:$LINENO: checking for compiler 'attribute weak_import' support" >&5
 $as_echo_n "checking for compiler 'attribute weak_import' support... " >&6; }
 saved_CFLAGS="$CFLAGS"

@@ -22975,6 +22986,10 @@ CFLAGS="$saved_CFLAGS"
 
 
 
 
 
 

+       # Several other platforms including Linux have GCC versions that
+       # define the weak attribute.  However, this attribute is only
+       # setup for use in the code by Darwin.
+

 { $as_echo "$as_me:$LINENO: checking for compiler 'attribute weak' support" >&5
 $as_echo_n "checking for compiler 'attribute weak' support... " >&6; }
 saved_CFLAGS="$CFLAGS"
 { $as_echo "$as_me:$LINENO: checking for compiler 'attribute weak' support" >&5
 $as_echo_n "checking for compiler 'attribute weak' support... " >&6; }
 saved_CFLAGS="$CFLAGS"

@@ -23092,6 +23107,134 @@ fi
 CFLAGS="$saved_CFLAGS"
 
 
 CFLAGS="$saved_CFLAGS"
 
 

+       ;;
+       linux-gnu)
+       # Primarily support weak symbols on Linux platforms.
+       #
+
+{ $as_echo "$as_me:$LINENO: checking for compiler 'attribute weakref' support" >&5
+$as_echo_n "checking for compiler 'attribute weakref' support... " >&6; }
+saved_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -Wall -Wno-unused -Werror"
+PBX_WEAKREF=0
+
+if test "xweakref("foo")" = "x"
+then
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+static void __attribute__((weakref)) *test(void *muffin, ...) {return (void *) 0;}
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+        test -z "$ac_c_werror_flag" ||
+        test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+       PBX_WEAKREF=1
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_ATTRIBUTE_weakref 1
+_ACEOF
+
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+       { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+else
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+static void __attribute__((weakref("foo"))) *test(void *muffin, ...) {return (void *) 0;}
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+        test -z "$ac_c_werror_flag" ||
+        test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+       PBX_WEAKREF=1
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_ATTRIBUTE_weakref 1
+_ACEOF
+
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+       { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+
+
+CFLAGS="$saved_CFLAGS"
+
+
+       ;;
+       *)
+       # Allow weak symbols on other platforms.  However, any problems
+       # with this feature on other platforms must be fixed by the
+       # community.
+       #

 
 { $as_echo "$as_me:$LINENO: checking for compiler 'attribute weakref' support" >&5
 $as_echo_n "checking for compiler 'attribute weakref' support... " >&6; }
 
 { $as_echo "$as_me:$LINENO: checking for compiler 'attribute weakref' support" >&5
 $as_echo_n "checking for compiler 'attribute weakref' support... " >&6; }

@@ -23210,6 +23353,8 @@ fi
 CFLAGS="$saved_CFLAGS"
 
 
 CFLAGS="$saved_CFLAGS"
 
 

+       ;;
+esac

 
 { $as_echo "$as_me:$LINENO: checking for -ffunction-sections support" >&5
 $as_echo_n "checking for -ffunction-sections support... " >&6; }
 
 { $as_echo "$as_me:$LINENO: checking for -ffunction-sections support" >&5
 $as_echo_n "checking for -ffunction-sections support... " >&6; }