[llvm] r242120 - [CMake] Unbreak add_llvm_external_project when external projects are specified.

[NAKAMURA Takumi]

Author: chapuni
Date: Tue Jul 14 00:12:53 2015
New Revision: 242120

URL: http://llvm.org/viewvc/llvm-project?rev=242120&view=rev
Log:
[CMake] Unbreak add_llvm_external_project when external projects are specified.

LLVM_EXTERNAL_*_SOURCE_DIR is reset as PATH with set(CACHE PATH).
Then the CACHE PATH variable, LLVM_EXTERNAL_*_SOURCE_DIR, is normalized as
${CMAKE_SOURCE_DIR}/${path_var} if ${path_var} is relative.

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=242120&r1=242119&r2=242120&view=diff
==============================================================================
--- llvm/trunk/cmake/modules/AddLLVM.cmake (original)
+++ llvm/trunk/cmake/modules/AddLLVM.cmake Tue Jul 14 00:12:53 2015
@@ -696,6 +696,9 @@ macro(add_llvm_external_project name)
   endif()
   if(NOT LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR)
     set(LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/${add_llvm_external_dir}")
+  else()
+    set(LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR
+        CACHE PATH "Path to ${name} source directory")
   endif()
   if (EXISTS ${LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR}/CMakeLists.txt)
     option(LLVM_EXTERNAL_${nameUPPER}_BUILD