Windows: get python libs version with CMAKE

Valentin Noel · Valentin Noel · commit d6a4a4f189c6 · 2014-10-21T14:45:43.000+02:00
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
@@ -65,10 +65,19 @@ if(SWIG_FOUND)
 	if(PYTHONLIBS_FOUND)
 		include_directories(${PYTHON_INCLUDE_PATH})
 
-		# Get Python version from include path
-		string(LENGTH ${PYTHON_INCLUDE_DIR} PYTHON_INCLUDE_DIRS_LENGTH)
-		math(EXPR PYTHON_INCLUDE_DIRS_LENGTH "${PYTHON_INCLUDE_DIRS_LENGTH} - 3" )
-		string(SUBSTRING ${PYTHON_INCLUDE_DIR} ${PYTHON_INCLUDE_DIRS_LENGTH} 3 PYTHONLIBS_VERSION_STRING)
+		if(${CMAKE_VERSION} STRLESS 2.8.8)
+			# Get Python version from include path
+			string(LENGTH ${PYTHON_INCLUDE_DIR} PYTHON_INCLUDE_DIRS_LENGTH)
+			if(WIN32)
+				set(PYTHON_INCLUDE_DIRS_LENGTH_EXPRESSION "${PYTHON_INCLUDE_DIRS_LENGTH} - 10")
+				set(PYTHON_VERSION_LENGTH_EXPRESSION "2")
+			else()
+				set(PYTHON_INCLUDE_DIRS_LENGTH_EXPRESSION "${PYTHON_INCLUDE_DIRS_LENGTH} - 3")
+				set(PYTHON_VERSION_LENGTH_EXPRESSION "3")		
+			endif()
+			math(EXPR PYTHON_INCLUDE_DIRS_LENGTH ${PYTHON_INCLUDE_DIRS_LENGTH_EXPRESSION} )
+			string(SUBSTRING ${PYTHON_INCLUDE_DIR} ${PYTHON_INCLUDE_DIRS_LENGTH} ${PYTHON_VERSION_LENGTH_EXPRESSION} PYTHONLIBS_VERSION_STRING)
+		endif()
 
 		# Swig flags
 		set(CMAKE_SWIG_FLAGS -c++ -fcompact)
