From 845b9813296460d52a1759a2c124f4069716d170 Mon Sep 17 00:00:00 2001
From: Rui Ueyama <ruiu@google.com>
Date: Wed, 12 Jul 2017 21:43:14 +0000
Subject: [PATCH] [Solaris] Detect Solaris LD, use detection results to pass
 Solaris-ld options

Solaris ld is not the only linker available on Solaris.
Introducing linker detection and using LLVM_LINKER_IS_SOLARISLD to
select Solaris-ld specific handling.

Patch by: Fedor Sergeev

Differential Revision: https://reviews.llvm.org/D35325

llvm-svn: 307852
---
 llvm/cmake/modules/AddLLVM.cmake | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/llvm/cmake/modules/AddLLVM.cmake b/llvm/cmake/modules/AddLLVM.cmake
index e6a405b52d0c..1c922651b133 100644
--- a/llvm/cmake/modules/AddLLVM.cmake
+++ b/llvm/cmake/modules/AddLLVM.cmake
@@ -91,7 +91,7 @@ function(add_llvm_symbol_exports target_name export_file)
       DEPENDS ${export_file}
       VERBATIM
       COMMENT "Creating export file for ${target_name}")
-    if (${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+    if (${LLVM_LINKER_IS_SOLARISLD})
       set_property(TARGET ${target_name} APPEND_STRING PROPERTY
                    LINK_FLAGS "  -Wl,-M,${CMAKE_CURRENT_BINARY_DIR}/${native_export_file}")
     else()
@@ -148,13 +148,28 @@ function(add_llvm_symbol_exports target_name export_file)
 endfunction(add_llvm_symbol_exports)
 
 if(NOT WIN32 AND NOT APPLE)
+  # Detect what linker we have here
   execute_process(
     COMMAND ${CMAKE_C_COMPILER} -Wl,--version
     OUTPUT_VARIABLE stdout
-    ERROR_QUIET
+    ERROR_VARIABLE stderr
     )
+  set(LLVM_LINKER_DETECTED ON)
   if("${stdout}" MATCHES "GNU gold")
     set(LLVM_LINKER_IS_GOLD ON)
+    message(STATUS "Linker detection: GNU Gold")
+  elseif("${stdout}" MATCHES "^LLD")
+    set(LLVM_LINKER_IS_LLD ON)
+    message(STATUS "Linker detection: LLD")
+  elseif("${stdout}" MATCHES "GNU ld")
+    set(LLVM_LINKER_IS_GNULD ON)
+    message(STATUS "Linker detection: GNU ld")
+  elseif("${stderr}" MATCHES "Solaris Link Editors")
+    set(LLVM_LINKER_IS_SOLARISLD ON)
+    message(STATUS "Linker detection: Solaris ld")
+  else()
+    set(LLVM_LINKER_DETECTED OFF)
+    message(STATUS "Linker detection: unknown")
   endif()
 endif()