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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#[=======================================================================[.rst:
CMakeFindPackageMode
--------------------
This file is executed by cmake when invoked with --find-package. It
expects that the following variables are set using -D:
``NAME``
name of the package
``COMPILER_ID``
the CMake compiler ID for which the result is,
i.e. GNU/Intel/Clang/MSVC, etc.
``LANGUAGE``
language for which the result will be used,
i.e. C/CXX/Fortran/ASM
``MODE``
``EXIST``
only check for existence of the given package
``COMPILE``
print the flags needed for compiling an object file which uses
the given package
``LINK``
print the flags needed for linking when using the given package
``QUIET``
if TRUE, don't print anything
#]=======================================================================]
if(NOT NAME)
message(FATAL_ERROR "Name of the package to be searched not specified. Set the CMake variable NAME, e.g. -DNAME=JPEG .")
endif()
if(NOT COMPILER_ID)
message(FATAL_ERROR "COMPILER_ID argument not specified. In doubt, use GNU.")
endif()
if(NOT LANGUAGE)
message(FATAL_ERROR "LANGUAGE argument not specified. Use C, CXX or Fortran.")
endif()
if(NOT MODE)
message(FATAL_ERROR "MODE argument not specified. Use either EXIST, COMPILE or LINK.")
endif()
# require the current version. If we don't do this, Platforms/CYGWIN.cmake complains because
# it doesn't know whether it should set WIN32 or not:
cmake_minimum_required(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}.${CMAKE_PATCH_VERSION} )
macro(ENABLE_LANGUAGE)
# disable the enable_language() command, otherwise --find-package breaks on Windows.
# On Windows, enable_language(RC) is called in the platform files unconditionally.
# But in --find-package mode, we don't want (and can't) enable any language.
endmacro()
set(CMAKE_PLATFORM_INFO_DIR ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY})
include(CMakeDetermineSystem)
# short-cut some tests on Darwin, see Darwin-GNU.cmake:
if("${CMAKE_SYSTEM_NAME}" MATCHES Darwin AND "${COMPILER_ID}" MATCHES GNU)
set(CMAKE_${LANGUAGE}_SYSROOT_FLAG "")
set(CMAKE_${LANGUAGE}_OSX_DEPLOYMENT_TARGET_FLAG "")
endif()
include(CMakeSystemSpecificInitialize)
# Also load the system specific file, which sets up e.g. the search paths.
# This makes the FIND_XXX() calls work much better
include(CMakeSystemSpecificInformation)
if(UNIX)
# try to guess whether we have a 64bit system, if it has not been set
# from the outside
if(NOT CMAKE_SIZEOF_VOID_P)
set(CMAKE_SIZEOF_VOID_P 4)
if(EXISTS ${CMAKE_SYSROOT}/usr/lib64)
set(CMAKE_SIZEOF_VOID_P 8)
else()
# use the file utility to check whether itself is 64 bit:
find_program(FILE_EXECUTABLE file)
if(FILE_EXECUTABLE)
get_filename_component(FILE_ABSPATH "${FILE_EXECUTABLE}" ABSOLUTE)
execute_process(COMMAND "${FILE_ABSPATH}" "${FILE_ABSPATH}" OUTPUT_VARIABLE fileOutput ERROR_QUIET)
if("${fileOutput}" MATCHES "64-bit")
set(CMAKE_SIZEOF_VOID_P 8)
endif()
endif()
endif()
endif()
# guess Debian multiarch if it has not been set:
if(EXISTS /etc/debian_version)
if(NOT CMAKE_${LANGUAGE}_LIBRARY_ARCHITECTURE )
file(GLOB filesInLib RELATIVE /lib /lib/*-linux-gnu* )
foreach(file ${filesInLib})
if("${file}" MATCHES "${CMAKE_LIBRARY_ARCHITECTURE_REGEX}")
set(CMAKE_${LANGUAGE}_LIBRARY_ARCHITECTURE ${file})
break()
endif()
endforeach()
endif()
if(NOT CMAKE_LIBRARY_ARCHITECTURE)
set(CMAKE_LIBRARY_ARCHITECTURE ${CMAKE_${LANGUAGE}_LIBRARY_ARCHITECTURE})
endif()
endif()
endif()
set(CMAKE_${LANGUAGE}_COMPILER "dummy")
set(CMAKE_${LANGUAGE}_COMPILER_ID "${COMPILER_ID}")
include(CMake${LANGUAGE}Information)
function(set_compile_flags_var _packageName)
string(TOUPPER "${_packageName}" PACKAGE_NAME)
# Check the following variables:
# FOO_INCLUDE_DIRS
# Foo_INCLUDE_DIRS
# FOO_INCLUDES
# Foo_INCLUDES
# FOO_INCLUDE_DIR
# Foo_INCLUDE_DIR
set(includes)
if(DEFINED ${_packageName}_INCLUDE_DIRS)
set(includes ${_packageName}_INCLUDE_DIRS)
elseif(DEFINED ${PACKAGE_NAME}_INCLUDE_DIRS)
set(includes ${PACKAGE_NAME}_INCLUDE_DIRS)
elseif(DEFINED ${_packageName}_INCLUDES)
set(includes ${_packageName}_INCLUDES)
elseif(DEFINED ${PACKAGE_NAME}_INCLUDES)
set(includes ${PACKAGE_NAME}_INCLUDES)
elseif(DEFINED ${_packageName}_INCLUDE_DIR)
set(includes ${_packageName}_INCLUDE_DIR)
elseif(DEFINED ${PACKAGE_NAME}_INCLUDE_DIR)
set(includes ${PACKAGE_NAME}_INCLUDE_DIR)
endif()
set(PACKAGE_INCLUDE_DIRS "${${includes}}" PARENT_SCOPE)
# Check the following variables:
# FOO_DEFINITIONS
# Foo_DEFINITIONS
set(definitions)
if(DEFINED ${_packageName}_DEFINITIONS)
set(definitions ${_packageName}_DEFINITIONS)
elseif(DEFINED ${PACKAGE_NAME}_DEFINITIONS)
set(definitions ${PACKAGE_NAME}_DEFINITIONS)
endif()
set(PACKAGE_DEFINITIONS "${${definitions}}" )
endfunction()
function(set_link_flags_var _packageName)
string(TOUPPER "${_packageName}" PACKAGE_NAME)
# Check the following variables:
# FOO_LIBRARIES
# Foo_LIBRARIES
# FOO_LIBS
# Foo_LIBS
set(libs)
if(DEFINED ${_packageName}_LIBRARIES)
set(libs ${_packageName}_LIBRARIES)
elseif(DEFINED ${PACKAGE_NAME}_LIBRARIES)
set(libs ${PACKAGE_NAME}_LIBRARIES)
elseif(DEFINED ${_packageName}_LIBS)
set(libs ${_packageName}_LIBS)
elseif(DEFINED ${PACKAGE_NAME}_LIBS)
set(libs ${PACKAGE_NAME}_LIBS)
endif()
set(PACKAGE_LIBRARIES "${${libs}}" PARENT_SCOPE )
endfunction()
find_package("${NAME}" QUIET)
set(PACKAGE_FOUND FALSE)
string(TOUPPER "${NAME}" UPPERCASE_NAME)
if(${NAME}_FOUND OR ${UPPERCASE_NAME}_FOUND)
set(PACKAGE_FOUND TRUE)
if("${MODE}" STREQUAL "EXIST")
# do nothing
elseif("${MODE}" STREQUAL "COMPILE")
set_compile_flags_var(${NAME})
elseif("${MODE}" STREQUAL "LINK")
set_link_flags_var(${NAME})
else()
message(FATAL_ERROR "Invalid mode argument ${MODE} given.")
endif()
endif()
set(PACKAGE_QUIET ${SILENT} )
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