r245685 - [CMake][Standalone] Detect Python. Python is used for Lit testing.

[NAKAMURA Takumi via cfe-commits]

Author: chapuni
Date: Fri Aug 21 04:38:46 2015
New Revision: 245685

URL: http://llvm.org/viewvc/llvm-project?rev=245685&view=rev
Log:
[CMake][Standalone] Detect Python. Python is used for Lit testing.

Modified:
    cfe/trunk/CMakeLists.txt

Modified: cfe/trunk/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/CMakeLists.txt?rev=245685&r1=245684&r2=245685&view=diff
==============================================================================
--- cfe/trunk/CMakeLists.txt (original)
+++ cfe/trunk/CMakeLists.txt Fri Aug 21 04:38:46 2015
@@ -116,6 +116,19 @@ if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURR
   set( CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX} )
 
   if(LLVM_INCLUDE_TESTS)
+    set(Python_ADDITIONAL_VERSIONS 2.7)
+    include(FindPythonInterp)
+    if(NOT PYTHONINTERP_FOUND)
+      message(FATAL_ERROR
+"Unable to find Python interpreter, required for builds and testing.
+
+Please install Python or specify the PYTHON_EXECUTABLE CMake variable.")
+    endif()
+
+    if( ${PYTHON_VERSION_STRING} VERSION_LESS 2.7 )
+      message(FATAL_ERROR "Python 2.7 or newer is required")
+    endif()
+
     # Check prebuilt llvm/utils.
     if(EXISTS ${LLVM_TOOLS_BINARY_DIR}/FileCheck${CMAKE_EXECUTABLE_SUFFIX}
         AND EXISTS ${LLVM_TOOLS_BINARY_DIR}/count${CMAKE_EXECUTABLE_SUFFIX}