Remove LLVM_GLOBAL_VISIBILITY, which is unused, and was not working properly.

The problem was that the test for whether a compiler supports it or not was
inaccurate, but has to be accurate: LLVM_LOCAL_VISIBILITY is an optimization
and not needed for correctness, so wrongly thinking a compiler doesn't support
it is not a big deal, but LLVM_GLOBAL_VISIBILITY is for correctness, and not
an optimization: getting it wrong is fatal: it needs to be set based on a
configure test not testing the gcc version.  Since dragonegg has moved to a
different scheme, and it was the only user of LLVM_GLOBAL_VISIBILITY, just
remove this macro.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113959 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h
index 14b36f80522d88961183d446e798611414edf833..efd978f4a1f13a3c79ee0f68bd8320447c81dad9 100644 (file)
--- a/include/llvm/Support/Compiler.h
+++ b/include/llvm/Support/Compiler.h
@@ -19,20 +19,10 @@
 /// into a shared library, then the class should be private to the library and
 /// not accessible from outside it.  Can also be used to mark variables and
 /// functions, making them private to any shared library they are linked into.
-
-/// LLVM_GLOBAL_VISIBILITY - If a class marked with this attribute is linked
-/// into a shared library, then the class will be accessible from outside the
-/// the library.  Can also be used to mark variables and functions, making them
-/// accessible from outside any shared library they are linked into.
-#if defined(__MINGW32__) || defined(__CYGWIN__)
-#define LLVM_LIBRARY_VISIBILITY
-#define LLVM_GLOBAL_VISIBILITY __declspec(dllexport)
-#elif (__GNUC__ >= 4)
+#if (__GNUC__ >= 4) && !defined(__MINGW32__) && !defined(__CYGWIN__)
 #define LLVM_LIBRARY_VISIBILITY __attribute__ ((visibility("hidden")))
-#define LLVM_GLOBAL_VISIBILITY __attribute__ ((visibility("default")))
 #else
 #define LLVM_LIBRARY_VISIBILITY
-#define LLVM_GLOBAL_VISIBILITY
 #endif
 
 #if (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))