[PATCH] D26950: [libc++abi] Add _LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS

[Shoaib Meenai via cfe-commits]

smeenai created this revision.
smeenai added reviewers: EricWF, mclow.lists.
smeenai added a subscriber: cfe-commits.

It's useful to be able to disable visibility annotations entirely; for
example, if we're building libc++abi static to include in another library,
and we don't want any libc++abi functions getting exported out of that
library. This is a generalization of _LIBCXXABI_DISABLE_DLL_IMPORT_EXPORT.


https://reviews.llvm.org/D26950

Files:
  include/__cxxabi_config.h


Index: include/__cxxabi_config.h
===================================================================
--- include/__cxxabi_config.h
+++ include/__cxxabi_config.h
@@ -22,7 +22,7 @@
 #endif
 
 #if defined(_WIN32)
- #if defined(_LIBCXXABI_DISABLE_DLL_IMPORT_EXPORT)
+ #if defined(_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS)
   #define _LIBCXXABI_HIDDEN
   #define _LIBCXXABI_DATA_VIS
   #define _LIBCXXABI_FUNC_VIS
@@ -39,13 +39,20 @@
   #define _LIBCXXABI_TYPE_VIS __declspec(dllimport)
  #endif
 #else
- #define _LIBCXXABI_HIDDEN __attribute__((__visibility__("hidden")))
- #define _LIBCXXABI_DATA_VIS __attribute__((__visibility__("default")))
- #define _LIBCXXABI_FUNC_VIS __attribute__((__visibility__("default")))
- #if __has_attribute(__type_visibility__)
-  #define _LIBCXXABI_TYPE_VIS __attribute__((__type_visibility__("default")))
+ #if !defined(_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS)
+  #define _LIBCXXABI_HIDDEN __attribute__((__visibility__("hidden")))
+  #define _LIBCXXABI_DATA_VIS __attribute__((__visibility__("default")))
+  #define _LIBCXXABI_FUNC_VIS __attribute__((__visibility__("default")))
+  #if __has_attribute(__type_visibility__)
+   #define _LIBCXXABI_TYPE_VIS __attribute__((__type_visibility__("default")))
+  #else
+   #define _LIBCXXABI_TYPE_VIS __attribute__((__visibility__("default")))
+  #endif
  #else
-  #define _LIBCXXABI_TYPE_VIS __attribute__((__visibility__("default")))
+  #define _LIBCXXABI_HIDDEN
+  #define _LIBCXXABI_DATA_VIS
+  #define _LIBCXXABI_FUNC_VIS
+  #define _LIBCXXABI_TYPE_VIS
  #endif
 #endif
 


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