[PATCH] D34637: [libunwind] Add _LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS

[Tom Anderson via Phabricator via llvm-commits]

thomasanderson created this revision.

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

Files:
  src/config.h


Index: src/config.h
===================================================================
--- src/config.h
+++ 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


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