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Add FetchContent fallback for CImg
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TheAssassin
parent
fb5cd4d32d
commit
d2e9567029
@ -7,8 +7,6 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
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set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake/Modules/")
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set(USE_SYSTEM_CIMG ON CACHE BOOL "Set to OFF to use CImg library bundled in lib directory")
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# support for ccache
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# call CMake with -DUSE_CCACHE=ON to make use of it
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set(USE_CCACHE ON CACHE BOOL "")
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@ -1,34 +1,97 @@
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# required for PNG imported target
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cmake_minimum_required(VERSION 3.6)
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#[=======================================================================[.rst:
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FindCImg
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-------
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find_package(PkgConfig)
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pkg_check_modules(libpng REQUIRED IMPORTED_TARGET libpng)
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pkg_check_modules(libjpeg REQUIRED IMPORTED_TARGET libjpeg)
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Finds the CImg library.
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message(STATUS "Searching for CImg")
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Imported Targets
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^^^^^^^^^^^^^^^^
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This module provides the following imported targets, if found:
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``CImg``
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The CImg library
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Result Variables
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^^^^^^^^^^^^^^^^
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This will define the following variables:
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``CImg_FOUND``
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True if the system has the CImg library.
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``CImg_VERSION``
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The version of the CImg library which was found.
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``CImg_INCLUDE_DIRS``
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Include directories needed to use CImg.
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``CImg_LIBRARIES``
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Libraries needed to link to CImg.
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Cache Variables
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^^^^^^^^^^^^^^^
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The following cache variables may also be set:
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``CImg_INCLUDE_DIR``
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The directory containing ``CImg.h``.
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#]=======================================================================]
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# 3.6 required for PNG imported target
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# 3.9 required for CMAKE_MATCH_<n>
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cmake_minimum_required(VERSION 3.9)
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find_path(CIMG_H_DIR
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NAMES CImg.h
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HINTS ${CMAKE_INSTALL_PREFIX}
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HINTS ${CMAKE_INSTALL_PREFIX} ${CIMG_DIR}
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PATH_SUFFIXES include include/linux
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)
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if(NOT CIMG_H_DIR)
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message(FATAL_ERROR "CImg.h not found")
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endif()
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set(CImg_FOUND FALSE)
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else()
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set(CImg_FOUND TRUE)
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find_package(PkgConfig)
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pkg_check_modules(libpng REQUIRED libpng)
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pkg_check_modules(libjpeg REQUIRED libjpeg)
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set(PNG_INCLUDE_DIR ${libpng_INCLUDE_DIRS})
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set(PNG_INCLUDE_DIR ${libjpeg_INCLUDE_DIRS})
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set(JPEG_INCLUDE_DIR ${libjpeg_INCLUDE_DIRS})
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if(NOT STATIC_BUILD)
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set(PNG_LIBRARY ${libpng_LIBRARIES})
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set(JPEG_LIBRARIES ${libjpeg_LIBRARIES})
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else()
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if(STATIC_BUILD)
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set(PNG_LIBRARY ${libpng_STATIC_LIBRARIES})
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set(JPEG_LIBRARIES ${libjpeg_STATIC_LIBRARIES})
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else()
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set(PNG_LIBRARY ${libpng_LIBRARIES})
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set(JPEG_LIBRARIES ${libjpeg_LIBRARIES})
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endif()
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set(CImg_INCLUDE_DIR ${CIMG_H_DIR} CACHE STRING "")
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set(CImg_INCLUDE_DIRS ${CImg_INCLUDE_DIR})
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set(CImg_LIBRARIES "${PNG_LIBRARY};${JPEG_LIBRARIES}")
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set(CImg_DEFINITIONS "cimg_display=0;cimg_use_png=1;cimg_use_jpeg=1")
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file(READ "${CIMG_H_DIR}/CImg.h" header)
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string(REGEX MATCH "#define cimg_version ([0-9a-zA-Z\.]+)" _ "${header}")
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set(CImg_VERSION "${CMAKE_MATCH_1}")
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# CImg_VERSION
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if(NOT TARGET CImg)
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add_library(CImg INTERFACE)
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set_property(TARGET CImg PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${CIMG_H_DIR};${PNG_INCLUDE_DIR};${JPEG_INCLUDE_DIR}")
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set_property(TARGET CImg PROPERTY INTERFACE_LINK_LIBRARIES "${PNG_LIBRARY};${JPEG_LIBRARIES}")
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set_property(TARGET CImg PROPERTY INTERFACE_COMPILE_DEFINITIONS "cimg_display=0;cimg_use_png=1;cimg_use_jpeg=1")
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set_property(TARGET CImg PROPERTY INTERFACE_LINK_LIBRARIES "${CImg_LIBRARIES}")
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set_property(TARGET CImg PROPERTY INTERFACE_COMPILE_DEFINITIONS "${CImg_DEFINITIONS}")
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endif()
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endif()
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(CImg
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FOUND_VAR CImg_FOUND
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REQUIRED_VARS
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CImg_INCLUDE_DIRS
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CImg_LIBRARIES
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CImg_DEFINITIONS
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VERSION_VAR CImg_VERSION
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)
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@ -5,7 +5,28 @@ file(GLOB HEADERS ${PROJECT_SOURCE_DIR}/include/linuxdeploy/core/*.h)
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find_package(Threads)
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find_package(CImg)
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if(NOT CImg_FOUND)
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message(STATUS "CImg not found, fetching from GitHub")
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cmake_minimum_required(VERSION 3.14)
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FetchContent_Declare(
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CImg
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GIT_REPOSITORY https://github.com/dtschump/CImg
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GIT_TAG v.2.9.9
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)
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FetchContent_MakeAvailable(CImg)
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# unfortunately there is no easy way to fetch the source dir with MakeAvailable
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# FETCHCONTENT_SOURCE_DIR_CIMG is not set
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# we can apparently predict the path from the base dir, though
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# we'll have to see how reliable this is going to be
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set(CIMG_DIR "${FETCHCONTENT_BASE_DIR}/cimg-src")
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find_package(CImg REQUIRED)
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endif()
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message(STATUS "Generating excludelist")
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execute_process(
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