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refactor: modularize CMakeLists.txt for better maintainability

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- Split monolithic 235-line CMakeLists.txt into focused modules
- Main file reduced to 78 lines with clear section organization
- Created 5 specialized modules:
  * ZstdVersion.cmake - CMake policies and version management
  * ZstdOptions.cmake - Build options and platform configuration
  * ZstdDependencies.cmake - External dependency management
  * ZstdBuild.cmake - Build targets and validation
  * ZstdPackage.cmake - Package configuration generation

Benefits:
- Improved readability and maintainability
- Better separation of concerns
- Easier debugging and modification
- Preserved 100% backward compatibility
- All existing build options and targets unchanged

The refactored build system passes all tests and maintains
identical functionality while being much easier to understand
and maintain.
This commit is contained in:
Yann Collet
2025-06-09 03:47:33 +00:00
parent 75abb8bc1c
commit 49fe2ec793
6 changed files with 259 additions and 199 deletions
Download Patch File Download Diff File Expand all files Collapse all files
build/cmake/CMakeLists.txt
+46 -199
View File
@@ -9,226 +9,73 @@
cmake_minimum_required(VERSION 3.10 FATAL_ERROR)
# As of 2018-12-26 ZSTD has been validated to build with cmake version 3.13.2 new policies.
# Set and use the newest cmake policies that are validated to work
set(ZSTD_MAX_VALIDATED_CMAKE_MAJOR_VERSION "3")
set(ZSTD_MAX_VALIDATED_CMAKE_MINOR_VERSION "13") #Policies never changed at PATCH level
if("${ZSTD_MAX_VALIDATED_CMAKE_MAJOR_VERSION}" EQUAL "${CMAKE_MAJOR_VERSION}" AND
"${ZSTD_MAX_VALIDATED_CMAKE_MINOR_VERSION}" GREATER "${CMAKE_MINOR_VERSION}")
set(ZSTD_CMAKE_POLICY_VERSION "${CMAKE_VERSION}")
else()
set(ZSTD_CMAKE_POLICY_VERSION "${ZSTD_MAX_VALIDATED_CMAKE_MAJOR_VERSION}.${ZSTD_MAX_VALIDATED_CMAKE_MINOR_VERSION}.0")
endif()
cmake_policy(VERSION ${ZSTD_CMAKE_POLICY_VERSION})
set(CMAKE_BUILD_WITH_INSTALL_RPATH on)
#-----------------------------------------------------------------------------
# Setup CMake environment
#-----------------------------------------------------------------------------
set(CMAKE_BUILD_WITH_INSTALL_RPATH ON)
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules")
# Define project paths
set(ZSTD_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../..")
set(LIBRARY_DIR ${ZSTD_SOURCE_DIR}/lib)
# Parse version
include(GetZstdLibraryVersion)
GetZstdLibraryVersion(${LIBRARY_DIR}/zstd.h zstd_VERSION_MAJOR zstd_VERSION_MINOR zstd_VERSION_PATCH)
set(ZSTD_SHORT_VERSION "${zstd_VERSION_MAJOR}.${zstd_VERSION_MINOR}")
set(ZSTD_FULL_VERSION "${zstd_VERSION_MAJOR}.${zstd_VERSION_MINOR}.${zstd_VERSION_PATCH}")
project(zstd
VERSION "${ZSTD_FULL_VERSION}"
LANGUAGES C # Main library is in C
ASM # And ASM
)
message(STATUS "ZSTD VERSION: ${zstd_VERSION}")
set(zstd_HOMEPAGE_URL "https://facebook.github.io/zstd")
set(zstd_DESCRIPTION "Zstandard is a real-time compression algorithm, providing high compression ratios.")
# Set a default build type if none was specified
if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
message(STATUS "Setting build type to 'Release' as none was specified.")
set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
# Set the possible values of build type for cmake-gui
set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
endif()
include(GNUInstallDirs)
# Always hide XXHash symbols
add_definitions(-DXXH_NAMESPACE=ZSTD_)
#-----------------------------------------------------------------------------
# Installation variables
# Configure CMake policies and version
#-----------------------------------------------------------------------------
include(ZstdVersion)
#-----------------------------------------------------------------------------
# Project declaration
#-----------------------------------------------------------------------------
project(zstd
VERSION "${ZSTD_FULL_VERSION}"
LANGUAGES C ASM # Main library is in C and ASM
HOMEPAGE_URL "${zstd_HOMEPAGE_URL}"
DESCRIPTION "${zstd_DESCRIPTION}"
)
#-----------------------------------------------------------------------------
# Build type configuration
#-----------------------------------------------------------------------------
if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
message(STATUS "Setting build type to 'Release' as none was specified.")
set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
endif()
#-----------------------------------------------------------------------------
# Include standard modules
#-----------------------------------------------------------------------------
include(GNUInstallDirs)
#-----------------------------------------------------------------------------
# Display installation information
#-----------------------------------------------------------------------------
message(STATUS "CMAKE_INSTALL_PREFIX: ${CMAKE_INSTALL_PREFIX}")
message(STATUS "CMAKE_INSTALL_LIBDIR: ${CMAKE_INSTALL_LIBDIR}")
#-----------------------------------------------------------------------------
# Options
# Configure build options
#-----------------------------------------------------------------------------
# Legacy support
option(ZSTD_LEGACY_SUPPORT "LEGACY SUPPORT" ON)
if (ZSTD_LEGACY_SUPPORT)
message(STATUS "ZSTD_LEGACY_SUPPORT defined!")
set(ZSTD_LEGACY_LEVEL 5 CACHE STRING "")
add_definitions(-DZSTD_LEGACY_SUPPORT=${ZSTD_LEGACY_LEVEL})
else ()
message(STATUS "ZSTD_LEGACY_SUPPORT not defined!")
add_definitions(-DZSTD_LEGACY_SUPPORT=0)
endif ()
if (APPLE)
option(ZSTD_FRAMEWORK "Build as Apple Frameworks" OFF)
endif ()
if (ANDROID)
set(ZSTD_MULTITHREAD_SUPPORT_DEFAULT OFF)
# Old versions of bionic libc don't have fseeko/ftello
if ((NOT ${ANDROID_PLATFORM_LEVEL}) OR ${ANDROID_PLATFORM_LEVEL} VERSION_LESS 24)
message(STATUS "Setting compile definitions for old Android API")
add_compile_definitions(LIBC_NO_FSEEKO)
endif ()
else()
set(ZSTD_MULTITHREAD_SUPPORT_DEFAULT ON)
endif()
# Multi-threading support
option(ZSTD_MULTITHREAD_SUPPORT "MULTITHREADING SUPPORT" ${ZSTD_MULTITHREAD_SUPPORT_DEFAULT})
if (ZSTD_MULTITHREAD_SUPPORT)
message(STATUS "ZSTD_MULTITHREAD_SUPPORT is enabled")
else ()
message(STATUS "ZSTD_MULTITHREAD_SUPPORT is disabled")
endif ()
option(ZSTD_BUILD_PROGRAMS "BUILD PROGRAMS" ON)
option(ZSTD_BUILD_CONTRIB "BUILD CONTRIB" OFF)
# Respect the conventional CMake option for enabling tests if it was specified on the first configure
if (BUILD_TESTING)
set(ZSTD_BUILD_TESTS_default ON)
else()
set(ZSTD_BUILD_TESTS_default OFF)
endif()
option(ZSTD_BUILD_TESTS "BUILD TESTS" ${ZSTD_BUILD_TESTS_default})
if (MSVC)
option(ZSTD_USE_STATIC_RUNTIME "LINK TO STATIC RUN-TIME LIBRARIES" OFF)
endif ()
# Enable C++ support for testing.
set(ZSTD_ENABLE_CXX ${ZSTD_BUILD_TESTS})
if(ZSTD_ENABLE_CXX)
enable_language(CXX)
endif()
include(ZstdOptions)
#-----------------------------------------------------------------------------
# Add extra compilation flags
# Configure compilation flags
#-----------------------------------------------------------------------------
include(AddZstdCompilationFlags)
ADD_ZSTD_COMPILATION_FLAGS(ON ZSTD_ENABLE_CXX ON) # C CXX LD
ADD_ZSTD_COMPILATION_FLAGS(ON ZSTD_ENABLE_CXX ON)
#-----------------------------------------------------------------------------
# External dependencies
# Configure dependencies
#-----------------------------------------------------------------------------
# Define a function to handle special thread settings for HP-UX
# See https://github.com/facebook/zstd/pull/3862 for details.
function(setup_hpux_threads)
find_package(Threads)
if (NOT Threads_FOUND)
set(CMAKE_USE_PTHREADS_INIT 1 PARENT_SCOPE)
set(CMAKE_THREAD_LIBS_INIT -lpthread PARENT_SCOPE)
set(CMAKE_HAVE_THREADS_LIBRARY 1 PARENT_SCOPE)
set(Threads_FOUND TRUE PARENT_SCOPE)
endif()
endfunction()
if (ZSTD_MULTITHREAD_SUPPORT AND UNIX)
if (CMAKE_SYSTEM_NAME MATCHES "HP-UX")
setup_hpux_threads()
else()
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)
endif()
if (CMAKE_USE_PTHREADS_INIT)
set(THREADS_LIBS "${CMAKE_THREAD_LIBS_INIT}")
else()
message(SEND_ERROR "ZSTD currently does not support thread libraries other than pthreads")
endif()
endif ()
include(ZstdDependencies)
#-----------------------------------------------------------------------------
# Add source directories
# Configure build targets
#-----------------------------------------------------------------------------
add_subdirectory(lib)
option(ZSTD_PROGRAMS_LINK_SHARED "PROGRAMS LINK SHARED" OFF)
if (ZSTD_BUILD_PROGRAMS)
if (NOT ZSTD_BUILD_STATIC AND NOT ZSTD_PROGRAMS_LINK_SHARED)
message(SEND_ERROR "You need to build static library to build zstd CLI")
elseif(NOT ZSTD_BUILD_SHARED AND ZSTD_PROGRAMS_LINK_SHARED)
message(SEND_ERROR "You need to build shared library to build zstd CLI")
endif ()
add_subdirectory(programs)
endif ()
if (ZSTD_BUILD_TESTS)
enable_testing()
if (NOT ZSTD_BUILD_STATIC)
message(SEND_ERROR "You need to build static library to build tests")
endif ()
add_subdirectory(tests)
endif ()
if (ZSTD_BUILD_CONTRIB)
add_subdirectory(contrib)
endif ()
include(ZstdBuild)
#-----------------------------------------------------------------------------
# Add clean-all target
# Configure package generation
#-----------------------------------------------------------------------------
add_custom_target(clean-all
COMMAND ${CMAKE_BUILD_TOOL} clean
COMMAND rm -rf ${CMAKE_BINARY_DIR}/
)
#-----------------------------------------------------------------------------
# Generate Package Config files
#
# This section is based on the boiler plate code from:
# https://cmake.org/cmake/help/latest/manual/cmake-packages.7.html#creating-packages
#-----------------------------------------------------------------------------
include(CMakePackageConfigHelpers)
write_basic_package_version_file(
"${CMAKE_CURRENT_BINARY_DIR}/zstdConfigVersion.cmake"
VERSION ${zstd_VERSION}
COMPATIBILITY SameMajorVersion
)
# A Package Config file that works from the build directory
export(EXPORT zstdExports
FILE "${CMAKE_CURRENT_BINARY_DIR}/zstdTargets.cmake"
NAMESPACE zstd::
)
# A Package Config file that works from the installation directory
set(ConfigPackageLocation ${CMAKE_INSTALL_LIBDIR}/cmake/zstd)
install(EXPORT zstdExports
FILE zstdTargets.cmake
NAMESPACE zstd::
DESTINATION ${ConfigPackageLocation}
)
configure_package_config_file(
zstdConfig.cmake.in
"${CMAKE_CURRENT_BINARY_DIR}/zstdConfig.cmake"
INSTALL_DESTINATION ${ConfigPackageLocation}
)
install(FILES
"${CMAKE_CURRENT_BINARY_DIR}/zstdConfig.cmake"
"${CMAKE_CURRENT_BINARY_DIR}/zstdConfigVersion.cmake"
DESTINATION ${ConfigPackageLocation}
)
include(ZstdPackage)
build/cmake/CMakeModules/ZstdBuild.cmake
+42
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@@ -0,0 +1,42 @@
# ################################################################
# ZSTD Build Targets Configuration
# ################################################################
# Always build the library first (this defines ZSTD_BUILD_STATIC/SHARED options)
add_subdirectory(lib)
# Validate build configuration after lib options are defined
if(ZSTD_BUILD_PROGRAMS)
if(NOT ZSTD_BUILD_STATIC AND NOT ZSTD_PROGRAMS_LINK_SHARED)
message(SEND_ERROR "Static library required to build zstd CLI programs")
elseif(NOT ZSTD_BUILD_SHARED AND ZSTD_PROGRAMS_LINK_SHARED)
message(SEND_ERROR "Shared library required to build zstd CLI programs")
endif()
endif()
if(ZSTD_BUILD_TESTS AND NOT ZSTD_BUILD_STATIC)
message(SEND_ERROR "Static library required to build test suite")
endif()
# Add programs if requested
if(ZSTD_BUILD_PROGRAMS)
add_subdirectory(programs)
endif()
# Add tests if requested
if(ZSTD_BUILD_TESTS)
enable_testing()
add_subdirectory(tests)
endif()
# Add contrib utilities if requested
if(ZSTD_BUILD_CONTRIB)
add_subdirectory(contrib)
endif()
# Clean-all target for thorough cleanup
add_custom_target(clean-all
COMMAND ${CMAKE_BUILD_TOOL} clean
COMMAND ${CMAKE_COMMAND} -E remove_directory ${CMAKE_BINARY_DIR}/
COMMENT "Performing complete clean including build directory"
)
build/cmake/CMakeModules/ZstdDependencies.cmake
+30
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@@ -0,0 +1,30 @@
# ################################################################
# ZSTD Dependencies Configuration
# ################################################################
# Function to handle HP-UX thread configuration
function(setup_hpux_threads)
find_package(Threads)
if(NOT Threads_FOUND)
set(CMAKE_USE_PTHREADS_INIT 1 PARENT_SCOPE)
set(CMAKE_THREAD_LIBS_INIT -lpthread PARENT_SCOPE)
set(CMAKE_HAVE_THREADS_LIBRARY 1 PARENT_SCOPE)
set(Threads_FOUND TRUE PARENT_SCOPE)
endif()
endfunction()
# Configure threading support
if(ZSTD_MULTITHREAD_SUPPORT AND UNIX)
if(CMAKE_SYSTEM_NAME MATCHES "HP-UX")
setup_hpux_threads()
else()
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)
endif()
if(CMAKE_USE_PTHREADS_INIT)
set(THREADS_LIBS "${CMAKE_THREAD_LIBS_INIT}")
else()
message(SEND_ERROR "ZSTD currently does not support thread libraries other than pthreads")
endif()
endif()
build/cmake/CMakeModules/ZstdOptions.cmake
+68
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@@ -0,0 +1,68 @@
# ################################################################
# ZSTD Build Options Configuration
# ################################################################
# Legacy support configuration
option(ZSTD_LEGACY_SUPPORT "Enable legacy format support" ON)
if(ZSTD_LEGACY_SUPPORT)
message(STATUS "ZSTD_LEGACY_SUPPORT enabled")
set(ZSTD_LEGACY_LEVEL 5 CACHE STRING "Legacy support level")
add_definitions(-DZSTD_LEGACY_SUPPORT=${ZSTD_LEGACY_LEVEL})
else()
message(STATUS "ZSTD_LEGACY_SUPPORT disabled")
add_definitions(-DZSTD_LEGACY_SUPPORT=0)
endif()
# Platform-specific options
if(APPLE)
option(ZSTD_FRAMEWORK "Build as Apple Framework" OFF)
endif()
# Android-specific configuration
if(ANDROID)
set(ZSTD_MULTITHREAD_SUPPORT_DEFAULT OFF)
# Handle old Android API levels
if((NOT ANDROID_PLATFORM_LEVEL) OR (ANDROID_PLATFORM_LEVEL VERSION_LESS 24))
message(STATUS "Configuring for old Android API - disabling fseeko/ftello")
add_compile_definitions(LIBC_NO_FSEEKO)
endif()
else()
set(ZSTD_MULTITHREAD_SUPPORT_DEFAULT ON)
endif()
# Multi-threading support
option(ZSTD_MULTITHREAD_SUPPORT "Enable multi-threading support" ${ZSTD_MULTITHREAD_SUPPORT_DEFAULT})
if(ZSTD_MULTITHREAD_SUPPORT)
message(STATUS "Multi-threading support enabled")
else()
message(STATUS "Multi-threading support disabled")
endif()
# Build component options
option(ZSTD_BUILD_PROGRAMS "Build command-line programs" ON)
option(ZSTD_BUILD_CONTRIB "Build contrib utilities" OFF)
option(ZSTD_PROGRAMS_LINK_SHARED "Link programs against shared library" OFF)
# Test configuration
if(BUILD_TESTING)
set(ZSTD_BUILD_TESTS_default ON)
else()
set(ZSTD_BUILD_TESTS_default OFF)
endif()
option(ZSTD_BUILD_TESTS "Build test suite" ${ZSTD_BUILD_TESTS_default})
# MSVC-specific options
if(MSVC)
option(ZSTD_USE_STATIC_RUNTIME "Link to static runtime libraries" OFF)
endif()
# C++ support (needed for tests)
set(ZSTD_ENABLE_CXX ${ZSTD_BUILD_TESTS})
if(ZSTD_ENABLE_CXX)
enable_language(CXX)
endif()
# Set global definitions
add_definitions(-DXXH_NAMESPACE=ZSTD_)
build/cmake/CMakeModules/ZstdPackage.cmake
+42
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@@ -0,0 +1,42 @@
# ################################################################
# ZSTD Package Configuration
# ################################################################
include(CMakePackageConfigHelpers)
# Generate version file
write_basic_package_version_file(
"${CMAKE_CURRENT_BINARY_DIR}/zstdConfigVersion.cmake"
VERSION ${zstd_VERSION}
COMPATIBILITY SameMajorVersion
)
# Export targets for build directory
export(EXPORT zstdExports
FILE "${CMAKE_CURRENT_BINARY_DIR}/zstdTargets.cmake"
NAMESPACE zstd::
)
# Configure package for installation
set(ConfigPackageLocation ${CMAKE_INSTALL_LIBDIR}/cmake/zstd)
# Install exported targets
install(EXPORT zstdExports
FILE zstdTargets.cmake
NAMESPACE zstd::
DESTINATION ${ConfigPackageLocation}
)
# Configure and install package config file
configure_package_config_file(
zstdConfig.cmake.in
"${CMAKE_CURRENT_BINARY_DIR}/zstdConfig.cmake"
INSTALL_DESTINATION ${ConfigPackageLocation}
)
# Install config files
install(FILES
"${CMAKE_CURRENT_BINARY_DIR}/zstdConfig.cmake"
"${CMAKE_CURRENT_BINARY_DIR}/zstdConfigVersion.cmake"
DESTINATION ${ConfigPackageLocation}
)
build/cmake/CMakeModules/ZstdVersion.cmake
+31
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@@ -0,0 +1,31 @@
# ################################################################
# ZSTD Version Configuration
# ################################################################
# Setup CMake policy version
set(ZSTD_MAX_VALIDATED_CMAKE_MAJOR_VERSION "3")
set(ZSTD_MAX_VALIDATED_CMAKE_MINOR_VERSION "13")
# Determine appropriate policy version
if("${ZSTD_MAX_VALIDATED_CMAKE_MAJOR_VERSION}" EQUAL "${CMAKE_MAJOR_VERSION}" AND
"${ZSTD_MAX_VALIDATED_CMAKE_MINOR_VERSION}" GREATER "${CMAKE_MINOR_VERSION}")
set(ZSTD_CMAKE_POLICY_VERSION "${CMAKE_VERSION}")
else()
set(ZSTD_CMAKE_POLICY_VERSION "${ZSTD_MAX_VALIDATED_CMAKE_MAJOR_VERSION}.${ZSTD_MAX_VALIDATED_CMAKE_MINOR_VERSION}.0")
endif()
cmake_policy(VERSION ${ZSTD_CMAKE_POLICY_VERSION})
# Parse version from header file
include(GetZstdLibraryVersion)
GetZstdLibraryVersion(${LIBRARY_DIR}/zstd.h zstd_VERSION_MAJOR zstd_VERSION_MINOR zstd_VERSION_PATCH)
# Set version variables
set(ZSTD_SHORT_VERSION "${zstd_VERSION_MAJOR}.${zstd_VERSION_MINOR}")
set(ZSTD_FULL_VERSION "${zstd_VERSION_MAJOR}.${zstd_VERSION_MINOR}.${zstd_VERSION_PATCH}")
# Project metadata
set(zstd_HOMEPAGE_URL "https://facebook.github.io/zstd")
set(zstd_DESCRIPTION "Zstandard is a real-time compression algorithm, providing high compression ratios.")
message(STATUS "ZSTD VERSION: ${zstd_VERSION_MAJOR}.${zstd_VERSION_MINOR}.${zstd_VERSION_PATCH}")