[llvm] r307852 - [Solaris] Detect Solaris LD, use detection results to pass Solaris-ld options

[Rui Ueyama via llvm-commits]

Author: ruiu
Date: Wed Jul 12 14:43:14 2017
New Revision: 307852

URL: http://llvm.org/viewvc/llvm-project?rev=307852&view=rev
Log:
[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

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=307852&r1=307851&r2=307852&view=diff
==============================================================================
--- llvm/trunk/cmake/modules/AddLLVM.cmake (original)
+++ llvm/trunk/cmake/modules/AddLLVM.cmake Wed Jul 12 14:43:14 2017
@@ -91,7 +91,7 @@ function(add_llvm_symbol_exports target_
       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_
 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()