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86578eccf2
Per-source copyright/license notice headers that spell out copyright holder names and years are hard to maintain and often out-of-date or plain wrong. Precise contributor information is already maintained automatically by the version control tool. Ultimately it is the receiver of a file who is responsible for determining its licensing status, and per-source notices are merely a convenience. Therefore it is simpler and more accurate for each source to have a generic notice of the license name and references to more detailed information on copyright holders and full license terms. Our `Copyright.txt` file now contains a list of Contributors whose names appeared source-level copyright notices. It also references version control history for more precise information. Therefore we no longer need to spell out the list of Contributors in each source file notice. Replace CMake per-source copyright/license notice headers with a short description of the license and links to `Copyright.txt` and online information available from "https://cmake.org/licensing". The online URL also handles cases of modules being copied out of our source into other projects, so we can drop our notices about replacing links with full license text. Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority of the replacements mechanically. Manually fix up shebang lines and trailing newlines in a few files. Manually update the notices in a few files that the script does not handle.
202 lines
6.0 KiB
CMake
202 lines
6.0 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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#.rst:
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# CMakeFindPackageMode
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# --------------------
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#
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#
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#
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# This file is executed by cmake when invoked with --find-package. It
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# expects that the following variables are set using -D:
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#
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# ``NAME``
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# name of the package
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# ``COMPILER_ID``
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# the CMake compiler ID for which the result is,
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# i.e. GNU/Intel/Clang/MSVC, etc.
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# ``LANGUAGE``
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# language for which the result will be used,
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# i.e. C/CXX/Fortan/ASM
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# ``MODE``
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# ``EXIST``
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# only check for existence of the given package
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# ``COMPILE``
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# print the flags needed for compiling an object file which uses
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# the given package
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# ``LINK``
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# print the flags needed for linking when using the given package
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# ``QUIET``
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# if TRUE, don't print anything
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if(NOT NAME)
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message(FATAL_ERROR "Name of the package to be searched not specified. Set the CMake variable NAME, e.g. -DNAME=JPEG .")
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endif()
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if(NOT COMPILER_ID)
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message(FATAL_ERROR "COMPILER_ID argument not specified. In doubt, use GNU.")
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endif()
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if(NOT LANGUAGE)
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message(FATAL_ERROR "LANGUAGE argument not specified. Use C, CXX or Fortran.")
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endif()
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if(NOT MODE)
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message(FATAL_ERROR "MODE argument not specified. Use either EXIST, COMPILE or LINK.")
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endif()
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# require the current version. If we don't do this, Platforms/CYGWIN.cmake complains because
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# it doesn't know whether it should set WIN32 or not:
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cmake_minimum_required(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}.${CMAKE_PATCH_VERSION} )
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macro(ENABLE_LANGUAGE)
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# disable the enable_language() command, otherwise --find-package breaks on Windows.
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# On Windows, enable_language(RC) is called in the platform files unconditionally.
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# But in --find-package mode, we don't want (and can't) enable any language.
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endmacro()
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set(CMAKE_PLATFORM_INFO_DIR ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY})
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include(CMakeDetermineSystem)
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# short-cut some tests on Darwin, see Darwin-GNU.cmake:
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if("${CMAKE_SYSTEM_NAME}" MATCHES Darwin AND "${COMPILER_ID}" MATCHES GNU)
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set(CMAKE_${LANGUAGE}_SYSROOT_FLAG "")
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set(CMAKE_${LANGUAGE}_OSX_DEPLOYMENT_TARGET_FLAG "")
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endif()
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# Also load the system specific file, which sets up e.g. the search paths.
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# This makes the FIND_XXX() calls work much better
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include(CMakeSystemSpecificInformation)
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if(UNIX)
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# try to guess whether we have a 64bit system, if it has not been set
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# from the outside
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if(NOT CMAKE_SIZEOF_VOID_P)
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set(CMAKE_SIZEOF_VOID_P 4)
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if(EXISTS /usr/lib64)
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set(CMAKE_SIZEOF_VOID_P 8)
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else()
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# use the file utility to check whether itself is 64 bit:
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find_program(FILE_EXECUTABLE file)
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if(FILE_EXECUTABLE)
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get_filename_component(FILE_ABSPATH "${FILE_EXECUTABLE}" ABSOLUTE)
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execute_process(COMMAND "${FILE_ABSPATH}" "${FILE_ABSPATH}" OUTPUT_VARIABLE fileOutput ERROR_QUIET)
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if("${fileOutput}" MATCHES "64-bit")
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set(CMAKE_SIZEOF_VOID_P 8)
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endif()
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endif()
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endif()
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endif()
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# guess Debian multiarch if it has not been set:
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if(EXISTS /etc/debian_version)
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if(NOT CMAKE_${LANGUAGE}_LIBRARY_ARCHITECTURE )
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file(GLOB filesInLib RELATIVE /lib /lib/*-linux-gnu* )
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foreach(file ${filesInLib})
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if("${file}" MATCHES "${CMAKE_LIBRARY_ARCHITECTURE_REGEX}")
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set(CMAKE_${LANGUAGE}_LIBRARY_ARCHITECTURE ${file})
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break()
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endif()
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endforeach()
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endif()
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if(NOT CMAKE_LIBRARY_ARCHITECTURE)
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set(CMAKE_LIBRARY_ARCHITECTURE ${CMAKE_${LANGUAGE}_LIBRARY_ARCHITECTURE})
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endif()
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endif()
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endif()
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set(CMAKE_${LANGUAGE}_COMPILER "dummy")
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set(CMAKE_${LANGUAGE}_COMPILER_ID "${COMPILER_ID}")
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include(CMake${LANGUAGE}Information)
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function(set_compile_flags_var _packageName)
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string(TOUPPER "${_packageName}" PACKAGE_NAME)
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# Check the following variables:
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# FOO_INCLUDE_DIRS
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# Foo_INCLUDE_DIRS
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# FOO_INCLUDES
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# Foo_INCLUDES
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# FOO_INCLUDE_DIR
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# Foo_INCLUDE_DIR
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set(includes)
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if(DEFINED ${_packageName}_INCLUDE_DIRS)
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set(includes ${_packageName}_INCLUDE_DIRS)
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elseif(DEFINED ${PACKAGE_NAME}_INCLUDE_DIRS)
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set(includes ${PACKAGE_NAME}_INCLUDE_DIRS)
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elseif(DEFINED ${_packageName}_INCLUDES)
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set(includes ${_packageName}_INCLUDES)
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elseif(DEFINED ${PACKAGE_NAME}_INCLUDES)
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set(includes ${PACKAGE_NAME}_INCLUDES)
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elseif(DEFINED ${_packageName}_INCLUDE_DIR)
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set(includes ${_packageName}_INCLUDE_DIR)
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elseif(DEFINED ${PACKAGE_NAME}_INCLUDE_DIR)
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set(includes ${PACKAGE_NAME}_INCLUDE_DIR)
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endif()
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set(PACKAGE_INCLUDE_DIRS "${${includes}}" PARENT_SCOPE)
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# Check the following variables:
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# FOO_DEFINITIONS
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# Foo_DEFINITIONS
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set(definitions)
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if(DEFINED ${_packageName}_DEFINITIONS)
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set(definitions ${_packageName}_DEFINITIONS)
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elseif(DEFINED ${PACKAGE_NAME}_DEFINITIONS)
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set(definitions ${PACKAGE_NAME}_DEFINITIONS)
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endif()
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set(PACKAGE_DEFINITIONS "${${definitions}}" )
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endfunction()
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function(set_link_flags_var _packageName)
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string(TOUPPER "${_packageName}" PACKAGE_NAME)
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# Check the following variables:
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# FOO_LIBRARIES
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# Foo_LIBRARIES
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# FOO_LIBS
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# Foo_LIBS
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set(libs)
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if(DEFINED ${_packageName}_LIBRARIES)
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set(libs ${_packageName}_LIBRARIES)
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elseif(DEFINED ${PACKAGE_NAME}_LIBRARIES)
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set(libs ${PACKAGE_NAME}_LIBRARIES)
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elseif(DEFINED ${_packageName}_LIBS)
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set(libs ${_packageName}_LIBS)
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elseif(DEFINED ${PACKAGE_NAME}_LIBS)
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set(libs ${PACKAGE_NAME}_LIBS)
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endif()
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set(PACKAGE_LIBRARIES "${${libs}}" PARENT_SCOPE )
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endfunction()
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find_package("${NAME}" QUIET)
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set(PACKAGE_FOUND FALSE)
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string(TOUPPER "${NAME}" UPPERCASE_NAME)
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if(${NAME}_FOUND OR ${UPPERCASE_NAME}_FOUND)
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set(PACKAGE_FOUND TRUE)
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if("${MODE}" STREQUAL "EXIST")
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# do nothing
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elseif("${MODE}" STREQUAL "COMPILE")
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set_compile_flags_var(${NAME})
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elseif("${MODE}" STREQUAL "LINK")
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set_link_flags_var(${NAME})
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else()
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message(FATAL_ERROR "Invalid mode argument ${MODE} given.")
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endif()
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endif()
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set(PACKAGE_QUIET ${SILENT} )
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