[libunwind] Add _LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS
It's useful to be able to disable visibility annotations entirely; for
example, if we're building libunwind static to include in another library,
and we don't want any libunwind functions getting exported out of that
library.
https://reviews.llvm.org/D34637
Patch from Thomas Anderson <[email protected]>!
git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@306442 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/config.h b/src/config.h
index 4be98c8..ac8d7d9 100644
--- a/src/config.h
+++ b/src/config.h
@@ -44,9 +44,14 @@
#endif
#endif
-// FIXME: these macros are not correct for COFF targets
-#define _LIBUNWIND_EXPORT __attribute__((visibility("default")))
-#define _LIBUNWIND_HIDDEN __attribute__((visibility("hidden")))
+#if defined(_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS)
+ #define _LIBUNWIND_EXPORT
+ #define _LIBUNWIND_HIDDEN
+#else
+ // FIXME: these macros are not correct for COFF targets
+ #define _LIBUNWIND_EXPORT __attribute__((visibility("default")))
+ #define _LIBUNWIND_HIDDEN __attribute__((visibility("hidden")))
+#endif
#if (defined(__APPLE__) && defined(__arm__)) || defined(__USING_SJLJ_EXCEPTIONS__)
#define _LIBUNWIND_BUILD_SJLJ_APIS
