Hi,
This patch fixes an issue in r194725. The call to atmoic builtin
is emmitted regardless of -fprofile-gen-atomic -- which results
in link unsat for targets without sync builtin support.
Tested with regression test in x86 (with builtin support.)
and powerpc32 (without builtin support).
Thanks,
-Rong
2013-01-02 Rong Xu <x...@google.com>
* gcc/gcov-io.h: Make __atomic_fetch_add weak for these
target without sync builtin support.
Index: gcc/gcov-io.h
===================================================================
--- gcc/gcov-io.h (revision 194739)
+++ gcc/gcov-io.h (working copy)
@@ -308,6 +308,10 @@ typedef unsigned gcov_type_unsigned __attribute__
#define GCOV_TYPE_ATOMIC_FETCH_ADD_FN __atomic_fetch_add_4
#define GCOV_TYPE_ATOMIC_FETCH_ADD BUILT_IN_ATOMIC_FETCH_ADD_4
#endif
+/* Make the atomic builtin weak. Otherwise we get link unsat
+ if the builtin is not available. */
+extern gcov_type GCOV_TYPE_ATOMIC_FETCH_ADD_FN
+ (gcov_type*, gcov_type, int) __attribute__ ((weak));
#undef EXTRACT_MODULE_ID_FROM_GLOBAL_ID
#undef EXTRACT_FUNC_ID_FROM_GLOBAL_ID
--
This patch is available for review at http://codereview.appspot.com/7031051
