[libunwind] r357671 - [libunwind] Export the weak alias in Mach-O

[Petr Hosek via cfe-commits]

Author: phosek
Date: Wed Apr  3 20:36:35 2019
New Revision: 357671

URL: http://llvm.org/viewvc/llvm-project?rev=357671&view=rev
Log:
[libunwind] Export the weak alias in Mach-O

This is not necessary for ELF since .globl and .weak are mutually
exclusive, but is necessary for Mach-O otherwise the symbol isn't
visible externally.

Differential Revision: https://reviews.llvm.org/D60245

Modified:
    libunwind/trunk/src/assembly.h

Modified: libunwind/trunk/src/assembly.h
URL: http://llvm.org/viewvc/llvm-project/libunwind/trunk/src/assembly.h?rev=357671&r1=357670&r2=357671&view=diff
==============================================================================
--- libunwind/trunk/src/assembly.h (original)
+++ libunwind/trunk/src/assembly.h Wed Apr  3 20:36:35 2019
@@ -47,6 +47,7 @@
 #define HIDDEN_SYMBOL(name) .private_extern name
 #define WEAK_SYMBOL(name) .weak_reference name
 #define WEAK_ALIAS(name, aliasname)                                            \
+  .globl SYMBOL_NAME(aliasname) SEPARATOR                                      \
   WEAK_SYMBOL(aliasname) SEPARATOR                                             \
   SYMBOL_NAME(aliasname) = SYMBOL_NAME(name)