--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cmake_modules/FindClang.cmake	Fri Nov 30 20:04:15 2012 -0600
@@ -0,0 +1,27 @@
+# Load LLVM/Clang
+IF (CLANG)
+    SET(CLANG_EXECUTABLE ${CLANG})
+ELSE()
+    FIND_PROGRAM(CLANG_EXECUTABLE
+        NAMES clang-mp-3.2 clang-mp-3.1 clang-mp-3.0 clang
+        PATHS /opt/local/bin /usr/local/bin /usr/bin)
+ENDIF()
+
+# Check LLVM/Clang version
+IF (CLANG_EXECUTABLE)
+    EXEC_PROGRAM(${CLANG_EXECUTABLE} ARGS "-v" OUTPUT_VARIABLE CLANG_VERSION_FULL)
+
+    STRING(REGEX MATCH "[0-9]+\\.[0-9]+" CLANG_VERSION_LONG "${CLANG_VERSION_FULL}")
+    STRING(REGEX REPLACE "([0-9]+\\.[0-9]+)" "\\1" CLANG_VERSION "${CLANG_VERSION_LONG}")
+
+    # Required that LLVM/Clang version is >= 3.0
+    IF (CLANG_VERSION VERSION_GREATER 3.0 OR CLANG_VERSION VERSION_EQUAL 3.0)
+        MESSAGE(STATUS "Found CLANG: ${CLANG_EXECUTABLE} (version ${CLANG_VERSION})")
+    ELSE()
+        MESSAGE(FATAL_ERROR "Necessary LLVM/Clang version not found (version >= 3.0 required)")
+    ENDIF()
+ELSE()
+    MESSAGE(FATAL_ERROR "No LLVM/Clang compiler found (required for engine_c target)")
+ENDIF()
+
+SET(CMAKE_C_COMPILER ${CLANG_EXECUTABLE})

--- a/project_files/hwc/CMakeLists.txt	Sat Nov 24 04:27:31 2012 +0100
+++ b/project_files/hwc/CMakeLists.txt	Fri Nov 30 20:04:15 2012 -0600
@@ -1,26 +1,3 @@
-
-#only Clang is supported
-if(CLANG)
-    set(clang_executable ${CLANG})
-else()
-    find_program(clang_executable
-        NAMES clang-mp-3.2 clang-mp-3.1 clang-mp-3.0 clang
-        PATHS /opt/local/bin /usr/local/bin /usr/bin)
-endif()
-
-if (clang_executable)
-    exec_program(${clang_executable} ARGS "-v" OUTPUT_VARIABLE clang_version_full)
-    string(REGEX MATCH "[0-9]+\\.[0-9]+" clang_version_long "${clang_version_full}")
-    string(REGEX REPLACE "([0-9]+\\.[0-9]+)" "\\1" clang_version "${clang_version_long}")
-    #TODO: check version >= 3.0
-    message(STATUS "Found CLANG: ${clang_executable} (version ${clang_version})")
-else()
-    message(FATAL_ERROR "No LLVM/Clang compiler found (required for engine_c target)")
-endif()
-
-set(CMAKE_C_COMPILER ${clang_executable})
-
-
 #the usual set of dependencies
 find_package(OpenGL REQUIRED)
 find_package(GLEW REQUIRED)