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cmake_minimum_required(VERSION 2.8.11)
project(Zopfli)
# Check if Zopfli is the top-level project (standalone), or a subproject
set(zopfli_standalone FALSE)
get_directory_property(zopfli_parent_directory PARENT_DIRECTORY)
if(zopfli_parent_directory STREQUAL "")
set(zopfli_standalone TRUE)
endif()
unset(zopfli_parent_directory)
#
# Options
#
# ZOPFLI_BUILD_SHARED controls if Zopfli libraries are built as shared or
# static
#
# It defaults to the value of BUILD_SHARED_LIBS if set, and in most cases
# that should be used instead. The purpose of ZOPFLI_BUILD_SHARED is to allow
# overriding it when built as a subproject.
set(zopfli_shared_default OFF)
if(DEFINED BUILD_SHARED_LIBS)
set(zopfli_shared_default ${BUILD_SHARED_LIBS})
endif()
option(ZOPFLI_BUILD_SHARED "Build Zopfli with shared libraries" ${zopfli_shared_default})
unset(zopfli_shared_default)
# ZOPFLI_BUILD_INSTALL controls if Zopfli adds an install target to the build
#
# When built standalone or as a shared library subproject, the default is ON,
# and for static library subproject the default is OFF.
if(zopfli_standalone OR ZOPFLI_BUILD_SHARED)
option(ZOPFLI_BUILD_INSTALL "Add Zopfli install target" ON)
else()
option(ZOPFLI_BUILD_INSTALL "Add Zopfli install target" OFF)
endif()
# ZOPFLI_DEFAULT_RELEASE enables changing empty build type to Release
#
# Make based single-configuration generators default to an empty build type,
# which might be surprising, but could be useful if you want full control over
# compiler and linker flags. When ZOPFLI_DEFAULT_RELEASE is ON, change an
# empty default build type to Release.
option(ZOPFLI_DEFAULT_RELEASE "If CMAKE_BUILD_TYPE is empty, default to Release" ON)
if(zopfli_standalone AND ZOPFLI_DEFAULT_RELEASE)
if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
message(STATUS "CMAKE_BUILD_TYPE empty, defaulting to Release")
set(CMAKE_BUILD_TYPE Release)
endif()
endif()
#
# Library version
#
set(ZOPFLI_VERSION_MAJOR 1)
set(ZOPFLI_VERSION_MINOR 0)
set(ZOPFLI_VERSION_PATCH 3)
set(ZOPFLI_VERSION ${ZOPFLI_VERSION_MAJOR}.${ZOPFLI_VERSION_MINOR}.${ZOPFLI_VERSION_PATCH})
if(ZOPFLI_BUILD_SHARED)
set(zopfli_library_type SHARED)
else()
set(zopfli_library_type STATIC)
endif()
include(GNUInstallDirs)
#
# libzopfli
#
add_library(libzopfli ${zopfli_library_type}
src/zopfli/blocksplitter.c
src/zopfli/cache.c
src/zopfli/deflate.c
src/zopfli/gzip_container.c
src/zopfli/hash.c
src/zopfli/katajainen.c
src/zopfli/lz77.c
src/zopfli/squeeze.c
src/zopfli/tree.c
src/zopfli/util.c
src/zopfli/zlib_container.c
src/zopfli/zopfli_lib.c
)
target_include_directories(libzopfli
INTERFACE
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src/zopfli>
$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
)
set_target_properties(libzopfli PROPERTIES
OUTPUT_NAME zopfli
VERSION ${ZOPFLI_VERSION}
SOVERSION ${ZOPFLI_VERSION_MAJOR}
)
if(UNIX AND NOT (BEOS OR HAIKU))
target_link_libraries(libzopfli m)
endif()
#
# libzopflipng
#
add_library(libzopflipng ${zopfli_library_type}
src/zopflipng/zopflipng_lib.cc
src/zopflipng/lodepng/lodepng.cpp
src/zopflipng/lodepng/lodepng_util.cpp
)
target_link_libraries(libzopflipng libzopfli)
target_include_directories(libzopflipng
INTERFACE
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src/zopflipng>
$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
)
set_target_properties(libzopflipng PROPERTIES
OUTPUT_NAME zopflipng
VERSION ${ZOPFLI_VERSION}
SOVERSION ${ZOPFLI_VERSION_MAJOR}
)
# MSVC does not export symbols by default when building a DLL, this is a
# workaround for recent versions of CMake
if(MSVC AND ZOPFLI_BUILD_SHARED)
if(CMAKE_VERSION VERSION_LESS 3.4)
message(WARNING "Automatic export of all symbols to DLL not supported until CMake 3.4")
else()
set_target_properties(libzopfli PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS ON)
set_target_properties(libzopflipng PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS ON)
endif()
endif()
#
# zopfli
#
add_executable(zopfli src/zopfli/zopfli_bin.c)
target_link_libraries(zopfli libzopfli)
if(MSVC)
target_compile_definitions(zopfli PRIVATE _CRT_SECURE_NO_WARNINGS)
endif()
#
# zopflipng
#
add_executable(zopflipng src/zopflipng/zopflipng_bin.cc)
target_link_libraries(zopflipng libzopflipng)
if(MSVC)
target_compile_definitions(zopflipng PRIVATE _CRT_SECURE_NO_WARNINGS)
endif()
# Create aliases
#
# Makes targets available to projects using Zopfli as a subproject using the
# same names as in the config file package.
if(NOT CMAKE_VERSION VERSION_LESS 3.0)
add_library(Zopfli::libzopfli ALIAS libzopfli)
add_library(Zopfli::libzopflipng ALIAS libzopflipng)
add_executable(Zopfli::zopfli ALIAS zopfli)
add_executable(Zopfli::zopflipng ALIAS zopflipng)
endif()
#
# Install
#
if(ZOPFLI_BUILD_INSTALL)
# Install binaries, libraries, and headers
install(TARGETS libzopfli libzopflipng zopfli zopflipng
EXPORT ZopfliTargets
RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
)
install(FILES src/zopfli/zopfli.h src/zopflipng/zopflipng_lib.h
DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
)
# Install config file package
#
# This allows CMake based projects to use the installed libraries with
# find_package(Zopfli).
if(NOT CMAKE_VERSION VERSION_LESS 3.0)
include(CMakePackageConfigHelpers)
write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/ZopfliConfigVersion.cmake
VERSION ${ZOPFLI_VERSION}
COMPATIBILITY SameMajorVersion
)
# Since we have no dependencies, use export file directly as config file
install(EXPORT ZopfliTargets
DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Zopfli
NAMESPACE Zopfli::
FILE ZopfliConfig.cmake
)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/ZopfliConfigVersion.cmake
DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Zopfli
)
endif()
endif()
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