re PR libitm/52220 (FAIL: libitm.c++/eh-1.C execution test due to Xcode 4 weakref linker bug)

libitm/
2012-02-15  Iain Sandoe  <iains@gcc.gnu.org>
	    Patrick Marlier  <patrick.marlier@gmail.com>

	PR libitm/52220
	* alloc_cpp.cc: No dummy definitions for darwin.
	* eh_cpp.cc: Likewise.

libgcc/
2012-02-15  Iain Sandoe  <iains@gcc.gnu.org>
	    Patrick Marlier  <patrick.marlier@gmail.com>

	PR libitm/52220
	* config/darwin-crt-tm.c: Generate dummy functions.


Co-Authored-By: Patrick Marlier <patrick.marlier@gmail.com>

From-SVN: r184293

5 files changed, 59 insertions, 2 deletions

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index ff5101a..fef5b6d 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,6 +1,12 @@
 2012-02-15  Iain Sandoe  <iains@gcc.gnu.org>
 	    Patrick Marlier  <patrick.marlier@gmail.com>
 
+	PR libitm/52220
+	* config/darwin-crt-tm.c: Generate dummy functions.
+
+2012-02-15  Iain Sandoe  <iains@gcc.gnu.org>
+	    Patrick Marlier  <patrick.marlier@gmail.com>
+
 	PR libitm/52042
 	* config/darwin-crt-tm.c (getTMCloneTable): New function.
 	(__doTMRegistrations): Call it.
diff --git a/libgcc/config/darwin-crt-tm.c b/libgcc/config/darwin-crt-tm.c
index 78053f65..319b4f8 100644
--- a/libgcc/config/darwin-crt-tm.c
+++ b/libgcc/config/darwin-crt-tm.c
@@ -39,6 +39,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #endif
 
 #define WEAK __attribute__((weak))
+#define UNUSED __attribute__((unused))
 
 extern void _ITM_registerTMCloneTable (void *, size_t) WEAK;
 extern void _ITM_deregisterTMCloneTable (void *) WEAK;
@@ -103,3 +104,46 @@ void __doTMdeRegistrations (void)
 }
 
 #endif
+
+/* Provide dummy functions to satisfy linkage for versions of the Darwin 
+   tool-chain that that can't handle undefined weak refs at the link stage.
+   ??? Define these dummy functions only when !HAVE_ELF_STYLE_WEAKREF. */
+
+extern void *__cxa_allocate_exception (size_t) WEAK;
+extern void __cxa_throw (void *, void *, void *) WEAK;
+extern void *__cxa_begin_catch (void *) WEAK;
+extern void *__cxa_end_catch (void) WEAK;
+extern void __cxa_tm_cleanup (void *, void *, unsigned int) WEAK;
+
+extern void *_ZnwX (size_t) WEAK;
+extern void _ZdlPv (void *) WEAK;
+extern void *_ZnaX (size_t) WEAK;
+extern void _ZdaPv (void *) WEAK;
+
+typedef const struct nothrow_t { } *c_nothrow_p;
+
+extern void *_ZnwXRKSt9nothrow_t (size_t, c_nothrow_p) WEAK;
+extern void _ZdlPvRKSt9nothrow_t (void *, c_nothrow_p) WEAK;
+extern void *_ZnaXRKSt9nothrow_t (size_t, c_nothrow_p) WEAK;
+extern void _ZdaPvRKSt9nothrow_t (void *, c_nothrow_p) WEAK;
+
+void *__cxa_allocate_exception (size_t s UNUSED) { return NULL; }
+void __cxa_throw (void * a UNUSED, void * b UNUSED, void * c UNUSED)
+  { return; }
+void *__cxa_begin_catch (void * a UNUSED) { return NULL; }
+void *__cxa_end_catch (void) { return NULL; }
+void __cxa_tm_cleanup (void * a UNUSED, void * b UNUSED, unsigned int c UNUSED)
+  { return; }
+
+void *_ZnwX (size_t s UNUSED) { return NULL; }
+void _ZdlPv (void * a UNUSED) { return; }
+void *_ZnaX (size_t s UNUSED) { return NULL; }
+void _ZdaPv (void * a UNUSED) { return; }
+
+void *_ZnwXRKSt9nothrow_t (size_t s UNUSED, c_nothrow_p b UNUSED)
+  { return NULL; }
+void _ZdlPvRKSt9nothrow_t (void * a UNUSED, c_nothrow_p b UNUSED)  { return; }
+void *_ZnaXRKSt9nothrow_t (size_t s UNUSED, c_nothrow_p b UNUSED)
+  { return NULL; }
+void _ZdaPvRKSt9nothrow_t (void * a UNUSED, c_nothrow_p b UNUSED) { return; }
+
diff --git a/libitm/ChangeLog b/libitm/ChangeLog
index 3b54c8b..e103ca0 100644
--- a/libitm/ChangeLog
+++ b/libitm/ChangeLog
@@ -1,3 +1,10 @@
+2012-02-15  Iain Sandoe  <iains@gcc.gnu.org>
+	    Patrick Marlier  <patrick.marlier@gmail.com>
+
+	PR libitm/52220
+	* alloc_cpp.cc: No dummy definitions for darwin.
+	* eh_cpp.cc: Likewise.
+
 2012-02-14  Richard Henderson  <rth@redhat.com>
 
 	* config/x86/target.h (GTM_longjmp): Correct the .cfi corrections.
diff --git a/libitm/alloc_cpp.cc b/libitm/alloc_cpp.cc
index 0789b2e..00a4d32 100644
--- a/libitm/alloc_cpp.cc
+++ b/libitm/alloc_cpp.cc
@@ -60,7 +60,7 @@ extern void _ZdlPvRKSt9nothrow_t (void *, c_nothrow_p) __attribute__((weak));
 extern void *_ZnaXRKSt9nothrow_t (size_t, c_nothrow_p) __attribute__((weak));
 extern void _ZdaPvRKSt9nothrow_t (void *, c_nothrow_p) __attribute__((weak));
 
-#if !defined (HAVE_ELF_STYLE_WEAKREF)
+#if !defined (HAVE_ELF_STYLE_WEAKREF) && !defined (__MACH__)
 void *_ZnwX (size_t) { return NULL; }
 void _ZdlPv (void *) { return; }
 void *_ZnaX (size_t) { return NULL; }
diff --git a/libitm/eh_cpp.cc b/libitm/eh_cpp.cc
index 352a313..5c4ca28 100644
--- a/libitm/eh_cpp.cc
+++ b/libitm/eh_cpp.cc
@@ -39,7 +39,7 @@ extern void *__cxa_begin_catch (void *) WEAK;
 extern void *__cxa_end_catch (void) WEAK;
 extern void __cxa_tm_cleanup (void *, void *, unsigned int) WEAK;
 
-#if !defined (HAVE_ELF_STYLE_WEAKREF)
+#if !defined (HAVE_ELF_STYLE_WEAKREF) && !defined (__MACH__)
 void *__cxa_allocate_exception (size_t) { return NULL; }
 void __cxa_throw (void *, void *, void *) { return; }
 void *__cxa_begin_catch (void *) { return NULL; }