cmake: make python search into a find package module.

1 files changed, 88 insertions, 0 deletions

diff --git a/build_files/cmake/Modules/FindPythonLibsUnix.cmake b/build_files/cmake/Modules/FindPythonLibsUnix.cmake
new file mode 100644
index 00000000000..729771f0a52
--- /dev/null
+++ b/build_files/cmake/Modules/FindPythonLibsUnix.cmake
@@ -0,0 +1,88 @@
+# - Find python libraries
+#
+#  PYTHON_VERSION
+#  PYTHON_INCLUDE_DIRS
+#  PYTHON_LIBRARY
+#  PYTHON_LIBPATH
+#  PYTHON_LINKFLAGS
+#  PYTHON_ROOT_DIR, The base directory to search for Python.
+#                   This can also be an environment variable.
+
+#=============================================================================
+
+# If PYTHON_ROOT_DIR was defined in the environment, use it.
+if(NOT PYTHON_ROOT_DIR AND NOT $ENV{PYTHON_ROOT_DIR} STREQUAL "")
+	set(PYTHON_ROOT_DIR $ENV{PYTHON_ROOT_DIR})
+endif()
+
+
+set(PYTHON_VERSION 3.2 CACHE STRING "")
+mark_as_advanced(PYTHON_VERSION)
+
+set(PYTHON_LINKFLAGS "-Xlinker -export-dynamic")
+mark_as_advanced(PYTHON_LINKFLAGS)
+
+set(_python_ABI_FLAGS
+	"m;mu;u; ")
+
+string(REPLACE "." "" _PYTHON_VERSION_NO_DOTS ${PYTHON_VERSION})
+
+set(_python_SEARCH_DIRS
+	${PYTHON_ROOT_DIR}
+	"$ENV{HOME}/py${_PYTHON_VERSION_NO_DOTS}"
+	"/opt/py${_PYTHON_VERSION_NO_DOTS}"
+)
+
+foreach(_CURRENT_ABI_FLAGS ${_python_ABI_FLAGS})
+	if(CMAKE_BUILD_TYPE STREQUAL Debug)
+		set(_CURRENT_ABI_FLAGS "d${_CURRENT_ABI_FLAGS}")
+	endif()
+	string(REPLACE " " "" _CURRENT_ABI_FLAGS ${_CURRENT_ABI_FLAGS})
+
+	find_path(PYTHON_INCLUDE_DIR
+		NAMES Python.h
+		HINTS ${_python_SEARCH_DIRS}
+		PATH_SUFFIXES include/python${PYTHON_VERSION}${_CURRENT_ABI_FLAGS}
+	)
+
+	find_library(PYTHON_LIBRARY
+		NAMES "python${PYTHON_VERSION}${_CURRENT_ABI_FLAGS}"
+		HINTS ${_python_SEARCH_DIRS}
+		PATH_SUFFIXES lib64 lib
+	)
+
+	if((EXISTS ${PYTHON_LIBRARY}) AND (EXISTS ${PYTHON_INCLUDE_DIR}))
+		break()
+	else()
+		# ensure we dont find values from 2 different ABI versions
+		unset(PYTHON_INCLUDE_DIR CACHE)
+		unset(PYTHON_LIBRARY CACHE)
+	endif()
+endforeach()
+
+unset(_CURRENT_ABI_FLAGS)
+unset(_CURRENT_PATH)
+
+unset(_python_ABI_FLAGS)
+unset(_python_SEARCH_DIRS)
+
+# handle the QUIETLY and REQUIRED arguments and set PYTHONLIBSUNIX_FOUND to TRUE if 
+# all listed variables are TRUE
+include(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(PythonLibsUnix  DEFAULT_MSG
+    PYTHON_LIBRARY PYTHON_INCLUDE_DIR)
+
+
+if(PYTHONLIBSUNIX_FOUND)
+	# Assign cache items
+	set(PYTHON_INCLUDE_DIRS ${PYTHON_INCLUDE_DIR} CACHE STRING "")
+	set(PYTHON_LIBRARY ${PYTHON_LIBRARY} CACHE STRING "")
+	# not used
+	# set(PYTHON_BINARY ${PYTHON_EXECUTABLE} CACHE STRING "")
+
+	mark_as_advanced(
+		PYTHON_INCLUDE_DIRS
+		PYTHON_INCLUDE_DIR
+		PYTHON_LIBRARY
+	)
+endif()