CMakeLists.txt

cmake_minimum_required(VERSION 3.18)

cmake_policy(SET CMP0011 NEW)
cmake_policy(SET CMP0025 NEW)
cmake_policy(SET CMP0048 NEW)
cmake_policy(SET CMP0067 NEW)

list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules/")
list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/")

### Add defaults for cmake
# These defaults need to be included before the project() call.
include(DefineCMakeDefaults)

if(CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
  message(FATAL_ERROR "In-source builds are not permitted. Make a separate folder for building:\nmkdir build; cd build; cmake ..\nBefore that, remove the files already created:\nrm -rf CMakeCache.txt CMakeFiles")
endif(CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)

if(DEFINED PROJECT_VERSION)
  project(ansel VERSION ${PROJECT_VERSION} LANGUAGES CXX C)
else()
  # Actual version string will be generated from git later
  project(ansel VERSION 0 LANGUAGES CXX C)
endif()

# Allow forcing the C/CPP compiler that is actually used during the compilation
# to something other than what is used by the cmake run. This is useful when
# the compiler for some reason breaks the initial cmake checks but works fine
# for actually compiling ansel. This allows building ansel using
# afl-clang-fast achieving a >4x speedup in fuzzing.
if(DEFINED DT_FORCE_C_COMPILER)
  set(CMAKE_C_COMPILER ${DT_FORCE_C_COMPILER})
endif()
if(DEFINED DT_FORCE_CXX_COMPILER)
  set(CMAKE_CXX_COMPILER ${DT_FORCE_CXX_COMPILER})
endif()

include(DefineOptions.cmake)

# Include GNUInstallDirs, which sets sensible defaults for install directories.
# See https://cmake.org/cmake/help/v3.0/module/GNUInstallDirs.html for further information.
# These values can be easily overridden if required.
# Some defaults are set for OpenBSD as well (info and man pages).

include(GNUInstallDirs)
include(FeatureSummary)

# Those are used to allow to copy program to other dir after installing. To
# archieve this, 2 requirements are needed:
#
# 1. Binaries and libraries must be relocatable. We achieve this by using RPATH.
# 2. Program must load libraries and resources relativly from where it is, so
#    with Requirement 1 we could copy the installed files anywhere to run, just
#    keep the strucrure. That's why we need such REL_* here.
#
# We will use REL_* in program to load files relatively, that is done by C code.
# XXX(AZ): Some people may set `CMAKE_INSTALL_BINDIR` to absolute path, we
#          should warn that this is not supported.
get_filename_component(CMAKE_INSTALL_BINDIR_ABS "${CMAKE_INSTALL_FULL_BINDIR}" REALPATH "${CMAKE_INSTALL_PREFIX}")
# Get relative dir name from system install dirs.
file(RELATIVE_PATH REL_BIN_TO_LIBDIR    ${CMAKE_INSTALL_FULL_BINDIR} "${CMAKE_INSTALL_FULL_LIBDIR}")
file(RELATIVE_PATH REL_BIN_TO_SHAREDIR  ${CMAKE_INSTALL_FULL_BINDIR} "${CMAKE_INSTALL_FULL_DATADIR}")
file(RELATIVE_PATH REL_BIN_TO_LOCALEDIR ${CMAKE_INSTALL_FULL_BINDIR} "${CMAKE_INSTALL_FULL_LOCALEDIR}")
# MODULEDIR is where we put all libraries that will be loaded dynamically at
# runtime, so it is `${LIBDIR}/ansel`.
set(REL_BIN_TO_MODULEDIR "${REL_BIN_TO_LIBDIR}/ansel")
set(REL_BIN_TO_DATADIR   "${REL_BIN_TO_SHAREDIR}/ansel")

# https://medium.com/@alasher/colored-c-compiler-output-with-ninja-clang-gcc-10bfe7f2b949
if(FORCE_COLORED_OUTPUT)
  if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
    add_compile_options(-fdiagnostics-color=always)
  elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
    add_compile_options(-fcolor-diagnostics)
  endif()
endif()

# Unify the RPATH origin.
# Those 2 vars need to be TRUE to let CMake obey the INSTALL_RPATH we set.
set(CMAKE_SKIP_BUILD_RPATH TRUE)
set(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)
if(APPLE)
  set(CMAKE_MACOSX_RPATH ON)
  set(RPATH_ORIGIN @loader_path)
else()
  set(RPATH_ORIGIN $ORIGIN)
endif()

if(USE_OPENMP)
  if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR
      CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")

    # Clang has an option to specify the OpenMP standard to use. Specify it.
    # FIXME: Implement this in FindOpenMP.cmake
    set(OPENMP_VERSION_SPECIFIER "-fopenmp-version=50")

    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OPENMP_VERSION_SPECIFIER}")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OPENMP_VERSION_SPECIFIER}")
  endif()

  find_package(OpenMP 4.5 REQUIRED)
endif()

# Check for base threading library
set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
find_package(Threads REQUIRED)

# Fail if returned library is not pthread
if(NOT CMAKE_USE_PTHREADS_INIT)
  message(FATAL_ERROR "POSIX threads: not found")
endif()

include(ConfigureChecks.cmake)

include(CheckCCompilerFlag)

# Check if this is source package build
if(NOT EXISTS ${CMAKE_SOURCE_DIR}/.git)
  set(SOURCE_PACKAGE 1)
else()
  set(SOURCE_PACKAGE 0)
endif()

if(NOT CMAKE_SYSTEM_PROCESSOR MATCHES "(x86_64)|(AMD64|amd64)|(X86|x86)|(^i.86$)")
  set(BUILD_SSE2_CODEPATHS OFF)
endif()

if(BUILD_SSE2_CODEPATHS)
  CHECK_C_COMPILER_FLAG("-msse2" _MSSE2)
  if(NOT _MSSE2)
    MESSAGE(WARNING "Building of SSE2-optimized codepaths is enabled, but the compiler does not understand -msse2.")
    set(BUILD_SSE2_CODEPATHS OFF)
  endif()
endif()

MESSAGE(STATUS "Building SSE2-optimized codepaths: ${BUILD_SSE2_CODEPATHS}")

#
# Set platform defaults...
#
if(APPLE)
  message("-- Mac OS X build detected, setting default features")
  find_program(HOMEBREW_EXISTS "brew")
  if(HOMEBREW_EXISTS)
    execute_process(COMMAND brew --prefix OUTPUT_VARIABLE HOMEBREW_PREFIX)
    string(STRIP "${HOMEBREW_PREFIX}" HOMEBREW_PREFIX)
    message("-- Homebrew detected, setting CMAKE_PREFIX_PATH to ${HOMEBREW_PREFIX}")
    list(APPEND CMAKE_PREFIX_PATH ${HOMEBREW_PREFIX})
    # Explicitly add llvm, icu4c and libsoup@2 to prefix path
    list(APPEND CMAKE_PREFIX_PATH ${HOMEBREW_PREFIX}/opt/llvm)
    list(APPEND CMAKE_PREFIX_PATH ${HOMEBREW_PREFIX}/opt/icu4c)
    list(APPEND CMAKE_PREFIX_PATH ${HOMEBREW_PREFIX}/opt/libsoup@2)
  else()
    message("-- Setting CMAKE_PREFIX_PATH to prefer MacPorts and/or user-installed libraries over system ones")
    list(APPEND CMAKE_PREFIX_PATH /opt/local /usr/local)
  endif()
  set(CMAKE_FIND_FRAMEWORK "LAST")
  # except libstdc++ (only one linked via -l flag, not full path)
  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -L/usr/lib")
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -L/usr/lib")
  set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -L/usr/lib")

  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_DARWIN_C_SOURCE")
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_DARWIN_C_SOURCE")
  add_definitions("-DOS_OBJECT_USE_OBJC=0")
endif(APPLE)

include(compiler-versions)

if(WIN32)
  message("-- Win32 build detected, setting default features")
  set(CMAKE_FIND_LIBRARY_SUFFIXES .dll ${CMAKE_FIND_LIBRARY_SUFFIXES})
  set(USE_COLORD OFF)
  set(USE_KWALLET OFF)
  set(BUILD_CMSTEST OFF)
  set(BUILD_PRINT OFF)
  set(TESTBUILD_OPENCL_PROGRAMS OFF)
  if(BUILD_MSYS2_INSTALL)
    add_definitions(-DMSYS2_INSTALL)
  endif()
endif(WIN32)


#
# Set package version
#
# The src/ subdirectory in build dir won't exist yet.
file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/src)

# adds custom command to generate header containing version info.
# takes 1 optional parameter - version override.
function(generate_version_gen_c)
  if(ARGC EQUAL 2)
    # if a version override was specified, use it
    set(_VERSION "${ARGV0}")
    set(_TYPE "${ARGV1}")
  else()
    # else, the tool will autodetect the version
    set(_VERSION "")
    set(_TYPE "git checkout")
  endif()

  add_custom_target(
    create_version_gen ALL
    COMMAND sh ${CMAKE_SOURCE_DIR}/tools/create_version_c.sh ${CMAKE_BINARY_DIR}/src/version_gen.c ${_VERSION}
    DEPENDS ${CMAKE_SOURCE_DIR}/tools/create_version_c.sh
    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
    COMMENT "Updating version string (${_TYPE})"
    VERBATIM # else might break when export-subst was needed but did not happen
  )
endfunction(generate_version_gen_c)

if(DEFINED PROJECT_VERSION AND PROJECT_VERSION VERSION_GREATER 0)
  # project version is defined by -D on the cmake command line
  # only use that value, do not update it at make time
  generate_version_gen_c(${PROJECT_VERSION} "version override")
else(DEFINED PROJECT_VERSION AND PROJECT_VERSION VERSION_GREATER 0)
  if(NOT SOURCE_PACKAGE) # i.e., a git checkout
    # this part is setting the corresponding CMake variable which gets used for example when creating a source package
    execute_process(
      COMMAND sh ${CMAKE_SOURCE_DIR}/tools/get_git_version_string.sh OUTPUT_STRIP_TRAILING_WHITESPACE
      OUTPUT_VARIABLE PROJECT_VERSION
      WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
    # FIXME: PROJECT_VERSION will not be updated automatically, until you rerun cmake
    generate_version_gen_c()
  else(NOT SOURCE_PACKAGE)
    if(NOT EXISTS ${CMAKE_SOURCE_DIR}/src/version_gen.c)
      # should be expanded by git archive due to export-subst in .gitattributes
      set(PROJECT_VERSION "archive-$Format:%H$")
      # but was it expanded?
      if(PROJECT_VERSION MATCHES Format)
        set(PROJECT_VERSION "unknown-version")
      endif(PROJECT_VERSION MATCHES Format)
      generate_version_gen_c(${PROJECT_VERSION} "source package")
    else(NOT EXISTS ${CMAKE_SOURCE_DIR}/src/version_gen.c)
      # no need to create version_gen.c if it's already shipped. that is for example the case with our release tarballs
      execute_process(
        COMMAND sh ${CMAKE_SOURCE_DIR}/tools/parse_version_c.sh ${CMAKE_SOURCE_DIR}/src/version_gen.c OUTPUT_STRIP_TRAILING_WHITESPACE
        OUTPUT_VARIABLE PROJECT_VERSION
        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
      )
      # FIXME: (irrelevant) PROJECT_VERSION will not be updated automatically, until you rerun cmake
      # but generate_version target expects it to be in build dir, so we need to copy it
      add_custom_target(
        create_version_gen ALL
        COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_SOURCE_DIR}/src/version_gen.c ${CMAKE_BINARY_DIR}/src/version_gen.c
        DEPENDS ${CMAKE_SOURCE_DIR}/src/version_gen.c
        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
        COMMENT "Updating version string (source package) - ${PROJECT_VERSION}"
      )
    endif(NOT EXISTS ${CMAKE_SOURCE_DIR}/src/version_gen.c)
  endif(NOT SOURCE_PACKAGE)
endif(DEFINED PROJECT_VERSION AND PROJECT_VERSION VERSION_GREATER 0)

# needed to make sure that version string is actually updated.
add_custom_command(
  OUTPUT ${CMAKE_BINARY_DIR}/src/version_gen.c
  COMMAND ${CMAKE_COMMAND} -E echo
  DEPENDS create_version_gen
  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
)

# WARNING: no target should reference version_gen.c directly. instead, they should add_dependencies(yourtarget generate_version)
add_custom_target(
  generate_version ALL
  DEPENDS ${CMAKE_BINARY_DIR}/src/version_gen.c
  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
)

# Add a sensible build type default and warning because empty means no optimization and no debug info.
if(NOT CMAKE_BUILD_TYPE)
  message("WARNING: CMAKE_BUILD_TYPE is not defined!\n         Defaulting to CMAKE_BUILD_TYPE=RelWithDebInfo. Use ccmake to set a proper value.")
  set(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel." FORCE)
endif(NOT CMAKE_BUILD_TYPE)

if(CMAKE_BUILD_TYPE MATCHES "^[Dd][Ee][Bb][Uu][Gg]$" AND SOURCE_PACKAGE)
  message(FATAL_ERROR "ERROR: Debug build type most likely isn't what you want, use RelWithDebInfo instead. If you're absolutely sure that this is what you want then just comment out this line.")
endif()

include(compiler-warnings)
include(windows-macros)

# we need some external programs for building ansel
message(STATUS "Looking for external programs")
set(EXTERNAL_PROGRAMS_FOUND 1)

# we need perl for introspection
find_program(perl_BIN perl)
if(${perl_BIN} STREQUAL "perl_BIN-NOTFOUND")
  message(STATUS "Missing perl")
  set(EXTERNAL_PROGRAMS_FOUND 0)
else(${perl_BIN} STREQUAL "perl_BIN-NOTFOUND")
  message(STATUS "Found perl")
endif(${perl_BIN} STREQUAL "perl_BIN-NOTFOUND")

# we need intltool-merge for ansel.desktop
find_program(intltool_merge_BIN intltool-merge)
if(${intltool_merge_BIN} STREQUAL "intltool_merge_BIN-NOTFOUND")
  message(STATUS "Missing intltool-merge")
  set(EXTERNAL_PROGRAMS_FOUND 0)
else(${intltool_merge_BIN} STREQUAL "intltool_merge_BIN-NOTFOUND")
  message(STATUS "Found intltool-merge")
endif(${intltool_merge_BIN} STREQUAL "intltool_merge_BIN-NOTFOUND")

# we need desktop-file-validate to check ansel.desktop
find_program(desktop_file_validate_BIN desktop-file-validate)
if(${desktop_file_validate_BIN} STREQUAL "desktop_file_validate_BIN-NOTFOUND")
  message(STATUS "Missing desktop-file-validate, problems in ansel.desktop might go unnoticed")
  set(VALIDATE_DESKTOP_FILE 0)
else(${desktop_file_validate_BIN} STREQUAL "desktop_file_validate_BIN-NOTFOUND")
  message(STATUS "Found desktop-file-validate")
  set(VALIDATE_DESKTOP_FILE 1)
endif(${desktop_file_validate_BIN} STREQUAL "desktop_file_validate_BIN-NOTFOUND")

# we need appstream-util to check ansel.appdata.xml
if(VALIDATE_APPDATA_FILE)
  find_program(appstream_util_BIN appstream-util)
  if(${appstream_util_BIN} STREQUAL "appstream_util_BIN-NOTFOUND")
    message(STATUS "Missing appstream-util, problems in ansel.appdata.xml might go unnoticed")
    set(VALIDATE_APPDATA_FILE OFF)
  else(${appstream_util_BIN} STREQUAL "appstream_util_BIN-NOTFOUND")
    message(STATUS "Found appstream-util")
  endif(${appstream_util_BIN} STREQUAL "appstream_util_BIN-NOTFOUND")
endif(VALIDATE_APPDATA_FILE)

if(TESTBUILD_OPENCL_PROGRAMS)
  set(TESTBUILD_OPENCL_PROGRAMS OFF)

  find_package(LLVM CONFIG)

  if(LLVM_FOUND)
    if(${LLVM_VERSION} VERSION_LESS 7)
      set(LLVM_FOUND FALSE)
    endif()
  endif()

  if(LLVM_FOUND)
    message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")

    find_program(CLANG_OPENCL_COMPILER
      NAMES clang-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR} clang-${LLVM_PACKAGE_VERSION} clang${LLVM_VERSION_MAJOR}${LLVM_VERSION_MINOR} clang-${LLVM_VERSION_MAJOR} clang${LLVM_VERSION_MAJOR}
    )

    if(NOT ${CLANG_OPENCL_COMPILER} STREQUAL "CLANG_OPENCL_COMPILER-NOTFOUND")
      message(STATUS "Found clang compiler - ${CLANG_OPENCL_COMPILER}")

      find_path(CLANG_OPENCL_INCLUDE_DIR opencl-c.h
        HINTS ${LLVM_INSTALL_PREFIX}/lib/clang ${LLVM_INSTALL_PREFIX}/lib64/clang
        PATH_SUFFIXES include ${LLVM_PACKAGE_VERSION}/include ${LLVM_VERSION_MAJOR}/include
        NO_DEFAULT_PATH
      )

      if(NOT ${CLANG_OPENCL_INCLUDE_DIR} STREQUAL "CLANG_OPENCL_INCLUDE_DIR-NOTFOUND")
        message(STATUS "Found clang opencl-c.h header in ${CLANG_OPENCL_INCLUDE_DIR}")
        set(TESTBUILD_OPENCL_PROGRAMS ON)
      else()
        message(WARNING "Could not find clang opencl-c.h header include dir")
        message(WARNING "Test-compilation of OpenCL programs can not be done.")
      endif()
    else()
      message(WARNING "Could not find appropriate clang compiler")
      message(WARNING "Test-compilation of OpenCL programs can not be done.")
    endif()
  else()
    message(WARNING "Could not find LLVM 7 or above")
    message(WARNING "Test-compilation of OpenCL programs can not be done.")
  endif()
endif()

if(USE_OPENCL AND TESTBUILD_OPENCL_PROGRAMS)
  message(STATUS "Will be able to test-compile OpenCL programs. Nice.")
elseif(USE_OPENCL)
  message(STATUS "Test-compilation of OpenCL programs is disabled.")
endif()

# we need jsonschema to check noiseprofiles.json
find_program(jsonschema_BIN jsonschema)
if(${jsonschema_BIN} STREQUAL "jsonschema_BIN-NOTFOUND")
  message(STATUS "Missing jsonschema, problems in noiseprofiles.json might go unnoticed")
  set(VALIDATE_JSON 0)
else(${jsonschema_BIN} STREQUAL "jsonschema_BIN-NOTFOUND")
  message(STATUS "Found jsonschema")
  set(VALIDATE_JSON 1)
endif(${jsonschema_BIN} STREQUAL "jsonschema_BIN-NOTFOUND")

# we need an XSLT interpreter to generate preferences_gen.h and anselrc
find_program(Xsltproc_BIN xsltproc)
if(${Xsltproc_BIN} STREQUAL "Xsltproc_BIN-NOTFOUND")
  message(STATUS "Missing xsltproc")
  find_program(Saxon_BIN saxon-xslt)
  if(${Saxon_BIN} STREQUAL "Saxon_BIN-NOTFOUND")
    message(STATUS "Missing Saxon-XSLT")
    message(STATUS "No XSLT interpreter found")
    set(EXTERNAL_PROGRAMS_FOUND 0)
  else(${Saxon_BIN} STREQUAL "Saxon_BIN-NOTFOUND")
    message(STATUS "Found Saxon-XSLT")
  endif(${Saxon_BIN} STREQUAL "Saxon_BIN-NOTFOUND")
else(${Xsltproc_BIN} STREQUAL "Xsltproc_BIN-NOTFOUND")
  message(STATUS "Found xsltproc")
endif(${Xsltproc_BIN} STREQUAL "Xsltproc_BIN-NOTFOUND")

# do we have xmllint?
if(USE_XMLLINT)
  find_program(Xmllint_BIN xmllint)
  if(${Xmllint_BIN} STREQUAL "Xmllint_BIN-NOTFOUND")
    message(STATUS "Missing xmllint")
    set(USE_XMLLINT OFF)
  else(${Xmllint_BIN} STREQUAL "Xmllint_BIN-NOTFOUND")
    message(STATUS "Found xmllint")
  endif(${Xmllint_BIN} STREQUAL "Xmllint_BIN-NOTFOUND")
endif(USE_XMLLINT)

find_program(exiftool_BIN exiftool)
if(${exiftool_BIN} STREQUAL "exiftool_BIN-NOTFOUND")
  message(STATUS "Missing exiftool")
  set(HAVE_EXIFTOOL 0)
else()
  message(STATUS "Found exiftool")
  set(HAVE_EXIFTOOL 1)
endif()

# done with looking for programs
if(NOT EXTERNAL_PROGRAMS_FOUND)
  message(FATAL_ERROR "Some external programs couldn't be found")
else(NOT EXTERNAL_PROGRAMS_FOUND)
  message(STATUS "All external programs found")
endif(NOT EXTERNAL_PROGRAMS_FOUND)

# The path can be modified by setting CMAKE_INSTALL_LOCALEDIR
if(USE_NLS)
  find_package(Gettext)
  if(GETTEXT_MSGFMT_EXECUTABLE)
    message(STATUS "Found msgfmt to convert .po file. Translation enabled")
    add_subdirectory(po)
  else()
    message(STATUS "Cannot find msgfmt to convert .po file. Translation won't be enabled")
  endif()
endif(USE_NLS)

# needed to generate file "preferences_gen.h" accordingly
if(USE_OPENCL)
  set(HAVE_OPENCL 1)
else()
  set(HAVE_OPENCL 0)
endif(USE_OPENCL)

if(NOT SOURCE_PACKAGE AND NOT (CMAKE_VERSION VERSION_LESS 3.3) AND DEFINED ENV{_DO_IWYU})
  find_program(iwyu_path NAMES include-what-you-use iwyu)

  if(iwyu_path)
    set(DT_CMAKE_INCLUDE_WHAT_YOU_USE ${iwyu_path} -Xiwyu --mapping_file=${CMAKE_SOURCE_DIR}/iwyu.imp -Xiwyu --prefix_header_includes=add)
  endif()

  find_program(iwyu_tool_path NAMES iwyu_tool.py)
  if(iwyu_tool_path)
    add_custom_command(
      OUTPUT "${CMAKE_BINARY_DIR}/iwyu.log"
      COMMAND "${iwyu_tool_path}" -v -p "${CMAKE_BINARY_DIR}"
              -- --mapping_file=${CMAKE_SOURCE_DIR}/iwyu.imp
              --prefix_header_includes=add 2>
              "${CMAKE_BINARY_DIR}/iwyu.log"
      WORKING_DIRECTORY "${CMAKE_BINARY_DIR}"
      COMMENT "Running include-what-you-use tool"
      VERBATIM
    )
    add_custom_target(iwyu
      DEPENDS "${CMAKE_BINARY_DIR}/iwyu.log"
      VERBATIM
    )
  endif()

  find_program(fix_includes_path NAMES fix_includes.py)
  if(fix_includes_path)
    add_custom_target(iwyu_fix
      COMMAND "${fix_includes_path}" --noblank_lines --comments
              --nosafe_headers < "${CMAKE_BINARY_DIR}/iwyu.log" || true
      COMMAND ${CMAKE_COMMAND} -E remove "${CMAKE_BINARY_DIR}/iwyu.log"
      DEPENDS "${CMAKE_BINARY_DIR}/iwyu.log"
      WORKING_DIRECTORY "${CMAKE_BINARY_DIR}"
      COMMENT "Running include-what-you-use fix_includes tool"
      VERBATIM
    )
  endif()
endif()

if(BUILD_TESTING)
  find_package(cmocka 1.1.0 CONFIG REQUIRED)
  include(AddCMockaTest)
  include(AddCMockaMockTest)
  include_directories(${CMOCKA_INCLUDE_DIR} include)
endif(BUILD_TESTING)

# we need some specific functions:
if(NOT WIN32)
  if(CMAKE_SYSTEM MATCHES "SunOS.*")
    add_definitions("-D_XOPEN_SOURCE=600")
  else()
    add_definitions("-D_XOPEN_SOURCE=700")
  endif(CMAKE_SYSTEM MATCHES "SunOS.*")
else()
  add_definitions("-D_USE_MATH_DEFINES")
endif()

# Set default component name - that way external modules like RawSpeed will install their
# materials under the default component and not under 'Unspecified'
set(CMAKE_INSTALL_DEFAULT_COMPONENT_NAME DTApplication)

# lets continue into build directories
# this file needs to be included first as it gets amended in src/ in build dir
include(data/supported_extensions.cmake)
# directory needs to be there before data directory so that the correct CSS file gets installed
add_subdirectory(src)
add_subdirectory(data)
add_subdirectory(doc)
add_subdirectory(tools)

# This contains fixup_bundle
# And adding a separate subderectory as a last one will make sure
# that fixup_bundle will run _after_ all files has been installed
add_subdirectory(packaging)

include(cmake/ansel-packaging.cmake)

# uninstall target
configure_file(
  "${CMAKE_CURRENT_SOURCE_DIR}/cmake/cmake_uninstall.cmake.in"
  "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
  IMMEDIATE @ONLY)

add_custom_target(uninstall
                  COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)

feature_summary(WHAT ALL)