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CMake/Modules/UseSWIG.cmake

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#.rst:
# UseSWIG
# -------
#
# SWIG module for CMake
#
# Defines the following macros:
#
# ::
#
# SWIG_ADD_MODULE(name language [ files ])
# - Define swig module with given name and specified language
# SWIG_LINK_LIBRARIES(name [ libraries ])
# - Link libraries to swig module
#
# All other macros are for internal use only. To get the actual name of
# the swig module, use: ${SWIG_MODULE_${name}_REAL_NAME}. Set Source
# files properties such as CPLUSPLUS and SWIG_FLAGS to specify special
# behavior of SWIG. Also global CMAKE_SWIG_FLAGS can be used to add
# special flags to all swig calls. Another special variable is
# CMAKE_SWIG_OUTDIR, it allows one to specify where to write all the
# swig generated module (swig -outdir option) The name-specific variable
# SWIG_MODULE_<name>_EXTRA_DEPS may be used to specify extra
# dependencies for the generated modules. If the source file generated
# by swig need some special flag you can use::
#
# set_source_files_properties( ${swig_generated_file_fullname}
# PROPERTIES COMPILE_FLAGS "-bla")
#=============================================================================
# Copyright 2004-2009 Kitware, Inc.
# Copyright 2009 Mathieu Malaterre <mathieu.malaterre@gmail.com>
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
# License text for the above reference.)
set(SWIG_CXX_EXTENSION "cxx")
set(SWIG_EXTRA_LIBRARIES "")
set(SWIG_PYTHON_EXTRA_FILE_EXTENSION "py")
#
# For given swig module initialize variables associated with it
#
macro(SWIG_MODULE_INITIALIZE name language)
string(TOUPPER "${language}" swig_uppercase_language)
string(TOLOWER "${language}" swig_lowercase_language)
set(SWIG_MODULE_${name}_LANGUAGE "${swig_uppercase_language}")
set(SWIG_MODULE_${name}_SWIG_LANGUAGE_FLAG "${swig_lowercase_language}")
set(SWIG_MODULE_${name}_REAL_NAME "${name}")
if (CMAKE_SWIG_FLAGS MATCHES "-noproxy")
set (SWIG_MODULE_${name}_NOPROXY TRUE)
endif ()
if("${SWIG_MODULE_${name}_LANGUAGE}" STREQUAL "UNKNOWN")
message(FATAL_ERROR "SWIG Error: Language \"${language}\" not found")
elseif("${SWIG_MODULE_${name}_LANGUAGE}" STREQUAL "PYTHON" AND NOT SWIG_MODULE_${name}_NOPROXY)
# swig will produce a module.py containing an 'import _modulename' statement,
# which implies having a corresponding _modulename.so (*NIX), _modulename.pyd (Win32),
# unless the -noproxy flag is used
set(SWIG_MODULE_${name}_REAL_NAME "_${name}")
elseif("${SWIG_MODULE_${name}_LANGUAGE}" STREQUAL "PERL")
set(SWIG_MODULE_${name}_EXTRA_FLAGS "-shadow")
elseif("${SWIG_MODULE_${name}_LANGUAGE}" STREQUAL "CSHARP")
# This makes sure that the name used in the generated DllImport
# matches the library name created by CMake
set(SWIG_MODULE_${name}_EXTRA_FLAGS "-dllimport;${name}")
endif()
endmacro()
#
# For a given language, input file, and output file, determine extra files that
# will be generated. This is internal swig macro.
#
macro(SWIG_GET_EXTRA_OUTPUT_FILES language outfiles generatedpath infile)
set(${outfiles} "")
get_source_file_property(SWIG_GET_EXTRA_OUTPUT_FILES_module_basename
${infile} SWIG_MODULE_NAME)
if(SWIG_GET_EXTRA_OUTPUT_FILES_module_basename STREQUAL "NOTFOUND")
get_filename_component(SWIG_GET_EXTRA_OUTPUT_FILES_module_basename "${infile}" NAME_WE)
endif()
foreach(it ${SWIG_${language}_EXTRA_FILE_EXTENSION})
set(${outfiles} ${${outfiles}}
"${generatedpath}/${SWIG_GET_EXTRA_OUTPUT_FILES_module_basename}.${it}")
endforeach()
endmacro()
#
# Take swig (*.i) file and add proper custom commands for it
#
macro(SWIG_ADD_SOURCE_TO_MODULE name outfiles infile)
set(swig_full_infile ${infile})
get_filename_component(swig_source_file_name_we "${infile}" NAME_WE)
get_source_file_property(swig_source_file_generated ${infile} GENERATED)
get_source_file_property(swig_source_file_cplusplus ${infile} CPLUSPLUS)
get_source_file_property(swig_source_file_flags ${infile} SWIG_FLAGS)
if("${swig_source_file_flags}" STREQUAL "NOTFOUND")
set(swig_source_file_flags "")
endif()
get_filename_component(swig_source_file_fullname "${infile}" ABSOLUTE)
# If CMAKE_SWIG_OUTDIR was specified then pass it to -outdir
if(CMAKE_SWIG_OUTDIR)
set(swig_outdir ${CMAKE_SWIG_OUTDIR})
else()
set(swig_outdir ${CMAKE_CURRENT_BINARY_DIR})
endif()
SWIG_GET_EXTRA_OUTPUT_FILES(${SWIG_MODULE_${name}_LANGUAGE}
swig_extra_generated_files
"${swig_outdir}"
"${infile}")
set(swig_generated_file_fullname
"${swig_outdir}/${swig_source_file_name_we}")
# add the language into the name of the file (i.e. TCL_wrap)
# this allows for the same .i file to be wrapped into different languages
set(swig_generated_file_fullname
"${swig_generated_file_fullname}${SWIG_MODULE_${name}_LANGUAGE}_wrap")
if(swig_source_file_cplusplus)
set(swig_generated_file_fullname
"${swig_generated_file_fullname}.${SWIG_CXX_EXTENSION}")
else()
set(swig_generated_file_fullname
"${swig_generated_file_fullname}.c")
endif()
#message("Full path to source file: ${swig_source_file_fullname}")
#message("Full path to the output file: ${swig_generated_file_fullname}")
get_directory_property(cmake_include_directories INCLUDE_DIRECTORIES)
list(REMOVE_DUPLICATES cmake_include_directories)
set(swig_include_dirs)
foreach(it ${cmake_include_directories})
set(swig_include_dirs ${swig_include_dirs} "-I${it}")
endforeach()
set(swig_special_flags)
# default is c, so add c++ flag if it is c++
if(swig_source_file_cplusplus)
set(swig_special_flags ${swig_special_flags} "-c++")
endif()
set(swig_extra_flags)
if(SWIG_MODULE_${name}_EXTRA_FLAGS)
set(swig_extra_flags ${swig_extra_flags} ${SWIG_MODULE_${name}_EXTRA_FLAGS})
endif()
add_custom_command(
OUTPUT "${swig_generated_file_fullname}" ${swig_extra_generated_files}
# Let's create the ${swig_outdir} at execution time, in case dir contains $(OutDir)
COMMAND ${CMAKE_COMMAND} -E make_directory ${swig_outdir}
COMMAND "${SWIG_EXECUTABLE}"
ARGS "-${SWIG_MODULE_${name}_SWIG_LANGUAGE_FLAG}"
${swig_source_file_flags}
${CMAKE_SWIG_FLAGS}
-outdir ${swig_outdir}
${swig_special_flags}
${swig_extra_flags}
${swig_include_dirs}
-o "${swig_generated_file_fullname}"
"${swig_source_file_fullname}"
MAIN_DEPENDENCY "${swig_source_file_fullname}"
DEPENDS ${SWIG_MODULE_${name}_EXTRA_DEPS}
COMMENT "Swig source")
set_source_files_properties("${swig_generated_file_fullname}" ${swig_extra_generated_files}
PROPERTIES GENERATED 1)
set(${outfiles} "${swig_generated_file_fullname}" ${swig_extra_generated_files})
endmacro()
#
# Create Swig module
#
macro(SWIG_ADD_MODULE name language)
SWIG_MODULE_INITIALIZE(${name} ${language})
set(swig_dot_i_sources)
set(swig_other_sources)
foreach(it ${ARGN})
if(${it} MATCHES ".*\\.i$")
set(swig_dot_i_sources ${swig_dot_i_sources} "${it}")
else()
set(swig_other_sources ${swig_other_sources} "${it}")
endif()
endforeach()
set(swig_generated_sources)
foreach(it ${swig_dot_i_sources})
SWIG_ADD_SOURCE_TO_MODULE(${name} swig_generated_source ${it})
set(swig_generated_sources ${swig_generated_sources} "${swig_generated_source}")
endforeach()
get_directory_property(swig_extra_clean_files ADDITIONAL_MAKE_CLEAN_FILES)
set_directory_properties(PROPERTIES
ADDITIONAL_MAKE_CLEAN_FILES "${swig_extra_clean_files};${swig_generated_sources}")
add_library(${SWIG_MODULE_${name}_REAL_NAME}
MODULE
${swig_generated_sources}
${swig_other_sources})
string(TOLOWER "${language}" swig_lowercase_language)
if ("${swig_lowercase_language}" STREQUAL "octave")
set_target_properties(${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES PREFIX "")
set_target_properties(${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES SUFFIX ".oct")
elseif ("${swig_lowercase_language}" STREQUAL "java")
if (APPLE)
# In java you want:
# System.loadLibrary("LIBRARY");
# then JNI will look for a library whose name is platform dependent, namely
# MacOS : libLIBRARY.jnilib
# Windows: LIBRARY.dll
# Linux : libLIBRARY.so
set_target_properties (${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES SUFFIX ".jnilib")
endif ()
elseif ("${swig_lowercase_language}" STREQUAL "python")
# this is only needed for the python case where a _modulename.so is generated
set_target_properties(${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES PREFIX "")
# Python extension modules on Windows must have the extension ".pyd"
# instead of ".dll" as of Python 2.5. Older python versions do support
# this suffix.
# http://docs.python.org/whatsnew/ports.html#SECTION0001510000000000000000
# <quote>
# Windows: .dll is no longer supported as a filename extension for extension modules.
# .pyd is now the only filename extension that will be searched for.
# </quote>
if(WIN32 AND NOT CYGWIN)
set_target_properties(${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES SUFFIX ".pyd")
endif()
elseif ("${swig_lowercase_language}" STREQUAL "ruby")
# In ruby you want:
# require 'LIBRARY'
# then ruby will look for a library whose name is platform dependent, namely
# MacOS : LIBRARY.bundle
# Windows: LIBRARY.dll
# Linux : LIBRARY.so
set_target_properties (${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES PREFIX "")
if (APPLE)
set_target_properties (${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES SUFFIX ".bundle")
endif ()
endif ()
endmacro()
#
# Like TARGET_LINK_LIBRARIES but for swig modules
#
macro(SWIG_LINK_LIBRARIES name)
if(SWIG_MODULE_${name}_REAL_NAME)
target_link_libraries(${SWIG_MODULE_${name}_REAL_NAME} ${ARGN})
else()
message(SEND_ERROR "Cannot find Swig library \"${name}\".")
endif()
endmacro()
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