[llvm] r224948 - [py3] Teach the CMake build to reject Python versions older than 2.7.

[Chandler Carruth]

Author: chandlerc
Date: Mon Dec 29 13:36:05 2014
New Revision: 224948

URL: http://llvm.org/viewvc/llvm-project?rev=224948&view=rev
Log:
[py3] Teach the CMake build to reject Python versions older than 2.7.
Continue to require Python 2 however as recent experiments suggest
LLDB's build requires it.

Modified:
    llvm/trunk/CMakeLists.txt

Modified: llvm/trunk/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/CMakeLists.txt?rev=224948&r1=224947&r2=224948&view=diff
==============================================================================
--- llvm/trunk/CMakeLists.txt (original)
+++ llvm/trunk/CMakeLists.txt Mon Dec 29 13:36:05 2014
@@ -344,7 +344,9 @@ set(TARGET_TRIPLE "${LLVM_DEFAULT_TARGET
 include(HandleLLVMOptions)
 
 # Verify that we can find a Python 2 interpreter.  Python 3 is unsupported.
-set(Python_ADDITIONAL_VERSIONS 2.7 2.6 2.5)
+# FIXME: We should support systems with only Python 3, but that requires work
+# on LLDB.
+set(Python_ADDITIONAL_VERSIONS 2.7)
 include(FindPythonInterp)
 if( NOT PYTHONINTERP_FOUND )
   message(FATAL_ERROR
@@ -353,6 +355,10 @@ if( NOT PYTHONINTERP_FOUND )
 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()
+
 ######
 # LLVMBuild Integration
 #