[PATCH] D34637: [libunwind] Add _LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS
Tom Anderson via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Jun 26 12:02:50 PDT 2017
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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