make optional detection of python work if python is not installed

svn path=/trunk/KDE/kdelibs/; revision=880249

1 files changed, 54 insertions, 51 deletions

diff --git a/modules/FindPythonLibrary.cmake b/modules/FindPythonLibrary.cmake
index 99fefdc2..dd33ab37 100644
--- a/modules/FindPythonLibrary.cmake
+++ b/modules/FindPythonLibrary.cmake
@@ -24,60 +24,63 @@
 
 INCLUDE(CMakeFindFrameworks)
 
-IF(EXISTS PYTHON_LIBRARY)
-   # Already in cache, be silent
-   SET(PYTHONLIBRARY_FOUND TRUE)
-ELSE(EXISTS PYTHON_LIBRARY)
+if(EXISTS PYTHON_LIBRARY)
+  # Already in cache, be silent
+  set(PYTHONLIBRARY_FOUND TRUE)
+else(EXISTS PYTHON_LIBRARY)
 
-  FIND_PACKAGE(PythonInterp REQUIRED)
+  FIND_PACKAGE(PythonInterp)
 
-  FIND_FILE(_find_lib_python_py FindLibPython.py PATHS ${CMAKE_MODULE_PATH})
+  if(PYTHONINTERP_FOUND)
 
-  EXECUTE_PROCESS(COMMAND ${PYTHON_EXECUTABLE}  ${_find_lib_python_py} OUTPUT_VARIABLE python_config)
-  IF(python_config)
-    STRING(REGEX REPLACE ".*exec_prefix:([^\n]+).*$" "\\1" PYTHON_PREFIX ${python_config})
-    STRING(REGEX REPLACE ".*\nshort_version:([^\n]+).*$" "\\1" PYTHON_SHORT_VERSION ${python_config})
-    STRING(REGEX REPLACE ".*\nlong_version:([^\n]+).*$" "\\1" PYTHON_LONG_VERSION ${python_config})
-    STRING(REGEX REPLACE ".*\npy_inc_dir:([^\n]+).*$" "\\1" PYTHON_INCLUDE_PATH ${python_config})
-    STRING(REGEX REPLACE ".*\nsite_packages_dir:([^\n]+).*$" "\\1" PYTHON_SITE_PACKAGES_DIR ${python_config})
-    STRING(REGEX REPLACE "([0-9]+).([0-9]+)" "\\1\\2" PYTHON_SHORT_VERSION_NO_DOT ${PYTHON_SHORT_VERSION})
-    set(PYTHON_LIBRARY_NAMES python${PYTHON_SHORT_VERSION} python${PYTHON_SHORT_VERSION_NO_DOT})
-    if(WIN32)
-        STRING(REPLACE "\\" "/" PYTHON_SITE_PACKAGES_DIR ${PYTHON_SITE_PACKAGES_DIR})
-    endif(WIN32)
-    FIND_LIBRARY(PYTHON_LIBRARY NAMES ${PYTHON_LIBRARY_NAMES} PATHS ${PYTHON_PREFIX}/lib ${PYTHON_PREFIX}/libs NO_DEFAULT_PATH)
-    SET(PYTHONLIBRARY_FOUND TRUE)
-  ENDIF(python_config)
+    FIND_FILE(_find_lib_python_py FindLibPython.py PATHS ${CMAKE_MODULE_PATH})
 
-  # adapted from cmake's builtin FindPythonLibs
-  if(APPLE)
-    CMAKE_FIND_FRAMEWORKS(Python)
-    SET(PYTHON_FRAMEWORK_INCLUDES)
-    IF(Python_FRAMEWORKS)
-      # If a framework has been selected for the include path,
-      # make sure "-framework" is used to link it.
-      IF("${PYTHON_INCLUDE_PATH}" MATCHES "Python\\.framework")
-        SET(PYTHON_LIBRARY "")
-        SET(PYTHON_DEBUG_LIBRARY "")
-      ENDIF("${PYTHON_INCLUDE_PATH}" MATCHES "Python\\.framework")
-      IF(NOT PYTHON_LIBRARY)
-        SET (PYTHON_LIBRARY "-framework Python" CACHE FILEPATH "Python Framework" FORCE)
-      ENDIF(NOT PYTHON_LIBRARY)
-      SET(PYTHONLIBRARY_FOUND TRUE)
-    ENDIF(Python_FRAMEWORKS)
-  ENDIF(APPLE)
+    EXECUTE_PROCESS(COMMAND ${PYTHON_EXECUTABLE}  ${_find_lib_python_py} OUTPUT_VARIABLE python_config)
+    if(python_config)
+      STRING(REGEX REPLACE ".*exec_prefix:([^\n]+).*$" "\\1" PYTHON_PREFIX ${python_config})
+      STRING(REGEX REPLACE ".*\nshort_version:([^\n]+).*$" "\\1" PYTHON_SHORT_VERSION ${python_config})
+      STRING(REGEX REPLACE ".*\nlong_version:([^\n]+).*$" "\\1" PYTHON_LONG_VERSION ${python_config})
+      STRING(REGEX REPLACE ".*\npy_inc_dir:([^\n]+).*$" "\\1" PYTHON_INCLUDE_PATH ${python_config})
+      STRING(REGEX REPLACE ".*\nsite_packages_dir:([^\n]+).*$" "\\1" PYTHON_SITE_PACKAGES_DIR ${python_config})
+      STRING(REGEX REPLACE "([0-9]+).([0-9]+)" "\\1\\2" PYTHON_SHORT_VERSION_NO_DOT ${PYTHON_SHORT_VERSION})
+      set(PYTHON_LIBRARY_NAMES python${PYTHON_SHORT_VERSION} python${PYTHON_SHORT_VERSION_NO_DOT})
+      if(WIN32)
+          STRING(REPLACE "\\" "/" PYTHON_SITE_PACKAGES_DIR ${PYTHON_SITE_PACKAGES_DIR})
+      endif(WIN32)
+      FIND_LIBRARY(PYTHON_LIBRARY NAMES ${PYTHON_LIBRARY_NAMES} PATHS ${PYTHON_PREFIX}/lib ${PYTHON_PREFIX}/libs NO_DEFAULT_PATH)
+      set(PYTHONLIBRARY_FOUND TRUE)
+    endif(python_config)
 
-  IF(PYTHONLIBRARY_FOUND)
-    SET(PYTHON_LIBRARIES ${PYTHON_LIBRARY})
-    IF(NOT PYTHONLIBRARY_FIND_QUIETLY)
-      MESSAGE(STATUS "Found Python executable: ${PYTHON_EXECUTABLE}")
-      MESSAGE(STATUS "Found Python version: ${PYTHON_LONG_VERSION}")
-      MESSAGE(STATUS "Found Python library: ${PYTHON_LIBRARY}")
-    ENDIF(NOT PYTHONLIBRARY_FIND_QUIETLY)
-  ELSE(PYTHONLIBRARY_FOUND)
-    IF(PYTHONLIBRARY_FIND_REQUIRED)
-      MESSAGE(FATAL_ERROR "Could not find Python")
-    ENDIF(PYTHONLIBRARY_FIND_REQUIRED)
-  ENDIF(PYTHONLIBRARY_FOUND)
+    # adapted from cmake's builtin FindPythonLibs
+    if(APPLE)
+      CMAKE_FIND_FRAMEWORKS(Python)
+      set(PYTHON_FRAMEWORK_INCLUDES)
+      if(Python_FRAMEWORKS)
+        # If a framework has been selected for the include path,
+        # make sure "-framework" is used to link it.
+        if("${PYTHON_INCLUDE_PATH}" MATCHES "Python\\.framework")
+          set(PYTHON_LIBRARY "")
+          set(PYTHON_DEBUG_LIBRARY "")
+        endif("${PYTHON_INCLUDE_PATH}" MATCHES "Python\\.framework")
+        if(NOT PYTHON_LIBRARY)
+          set (PYTHON_LIBRARY "-framework Python" CACHE FILEPATH "Python Framework" FORCE)
+        endif(NOT PYTHON_LIBRARY)
+        set(PYTHONLIBRARY_FOUND TRUE)
+      endif(Python_FRAMEWORKS)
+    endif(APPLE)
+  endif(PYTHONINTERP_FOUND)
 
-ENDIF (EXISTS PYTHON_LIBRARY)
+  if(PYTHONLIBRARY_FOUND)
+    set(PYTHON_LIBRARIES ${PYTHON_LIBRARY})
+    if(NOT PYTHONLIBRARY_FIND_QUIETLY)
+      message(STATUS "Found Python executable: ${PYTHON_EXECUTABLE}")
+      message(STATUS "Found Python version: ${PYTHON_LONG_VERSION}")
+      message(STATUS "Found Python library: ${PYTHON_LIBRARY}")
+    endif(NOT PYTHONLIBRARY_FIND_QUIETLY)
+  else(PYTHONLIBRARY_FOUND)
+    if(PYTHONLIBRARY_FIND_REQUIRED)
+      message(FATAL_ERROR "Could not find Python")
+    endif(PYTHONLIBRARY_FIND_REQUIRED)
+  endif(PYTHONLIBRARY_FOUND)
+
+endif (EXISTS PYTHON_LIBRARY)