[PATCH] D13025: Modify cmake to test whether link version scripts are supported.

[Vasileios Kalintiris via llvm-commits]

vkalintiris created this revision.
vkalintiris added a reviewer: chandlerc.
vkalintiris added a subscriber: llvm-commits.

http://reviews.llvm.org/D13025

Files:
  cmake/modules/HandleLLVMOptions.cmake

Index: cmake/modules/HandleLLVMOptions.cmake
===================================================================
--- cmake/modules/HandleLLVMOptions.cmake
+++ cmake/modules/HandleLLVMOptions.cmake
@@ -111,7 +111,12 @@
     if(APPLE)
       set(LLVM_HAVE_LINK_VERSION_SCRIPT 0)
     else(APPLE)
-      set(LLVM_HAVE_LINK_VERSION_SCRIPT 1)
+      set(SIMPLE_VERSION_SCRIPT ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple.script)
+      file(WRITE ${SIMPLE_VERSION_SCRIPT} "{ global: main; local: *; };")
+      set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
+      set(CMAKE_REQUIRED_FLAGS "-Wl,--version-script,${SIMPLE_VERSION_SCRIPT}")
+      check_cxx_compiler_flag("" LLVM_HAVE_LINK_VERSION_SCRIPT)
+      set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
     endif(APPLE)
   else(UNIX)
     MESSAGE(SEND_ERROR "Unable to determine platform")


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