[llvm] r240287 - Support Solaris unused sections' gc link syntax.

[Rafael Espindola]

Author: rafael
Date: Mon Jun 22 10:06:17 2015
New Revision: 240287

URL: http://llvm.org/viewvc/llvm-project?rev=240287&view=rev
Log:
Support Solaris unused sections' gc link syntax.

It is not clear if this would work or not with LLVM_NO_DEAD_STRIP
binaries, so be conservative for now.

Patch by Xan López.

Modified:
    llvm/trunk/cmake/modules/AddLLVM.cmake

Modified: llvm/trunk/cmake/modules/AddLLVM.cmake
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/cmake/modules/AddLLVM.cmake?rev=240287&r1=240286&r2=240287&view=diff
==============================================================================
--- llvm/trunk/cmake/modules/AddLLVM.cmake (original)
+++ llvm/trunk/cmake/modules/AddLLVM.cmake Mon Jun 22 10:06:17 2015
@@ -186,6 +186,9 @@ function(add_link_opts target_name)
         # ld64's implementation of -dead_strip breaks tools that use plugins.
         set_property(TARGET ${target_name} APPEND_STRING PROPERTY
                      LINK_FLAGS " -Wl,-dead_strip")
+      elseif(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+        set_property(TARGET ${target_name} APPEND_STRING PROPERTY
+                     LINK_FLAGS " -Wl,-z -Wl,discard-unused=sections")
       elseif(NOT WIN32 AND NOT LLVM_LINKER_IS_GOLD)
         # Object files are compiled with -ffunction-data-sections.
         # Versions of bfd ld < 2.23.1 have a bug in --gc-sections that breaks