官网下载的cmake源码

# IF(0) # CMake handles policy settings in its own build. CMAKE_MINIMUM_REQUIRED(VERSION 2.8.12 FATAL_ERROR) if(POLICY CMP0065) cmake_policy(SET CMP0065 NEW) #3.4 don't use `-rdynamic` with executables endif() if(POLICY CMP0074) cmake_policy(SET CMP0074 NEW) #3.12.0 `find_package()`` uses ``<PackageName>_ROOT`` variables. endif() ENDIF() # PROJECT(libarchive C) # SET(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/build/cmake") if(NOT CMAKE_RUNTIME_OUTPUT_DIRECTORY) set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${libarchive_BINARY_DIR}/bin) endif() IF(0) # CMake handles build type selection in its own build. # # Set the Build type for make based generators. # You can choose following types: # Debug : Debug build # Release : Release build # RelWithDebInfo : Release build with Debug Info # MinSizeRel : Release Min Size build IF(NOT CMAKE_BUILD_TYPE) SET(CMAKE_BUILD_TYPE "Release" CACHE STRING "Build Type" FORCE) ENDIF(NOT CMAKE_BUILD_TYPE) # Set a value type to properly display CMAKE_BUILD_TYPE on GUI if the # value type is "UNINITIALIZED". GET_PROPERTY(cached_type CACHE CMAKE_BUILD_TYPE PROPERTY TYPE) IF("${cached_type}" STREQUAL "UNINITIALIZED") SET(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING "Build Type" FORCE) ENDIF("${cached_type}" STREQUAL "UNINITIALIZED") # Check the Build Type. IF(NOT "${CMAKE_BUILD_TYPE}" MATCHES "^(Debug|Release|RelWithDebInfo|MinSizeRel)\$") MESSAGE(FATAL_ERROR "Unknown keyword for CMAKE_BUILD_TYPE: ${CMAKE_BUILD_TYPE}\n" "Acceptable keywords: Debug,Release,RelWithDebInfo,MinSizeRel") ENDIF(NOT "${CMAKE_BUILD_TYPE}" MATCHES "^(Debug|Release|RelWithDebInfo|MinSizeRel)\$") ENDIF() # On MacOS, prefer MacPorts libraries to system libraries. # I haven't come up with a compelling argument for this to be conditional. list(APPEND CMAKE_PREFIX_PATH /opt/local) # Enable @rpath in the install name. # detail in "cmake --help-policy CMP0042" SET(CMAKE_MACOSX_RPATH ON) # # Version - read from 'version' file. # FILE(STRINGS ${CMAKE_CURRENT_SOURCE_DIR}/build/version _version) STRING(REGEX REPLACE "^([0-9])[0-9][0-9][0-9][0-9][0-9][0-9][a-z]*$" "\\1" _major ${_version}) STRING(REGEX REPLACE "^[0-9]([0-9][0-9][0-9])[0-9][0-9][0-9][a-z]*$" "\\1" _minor ${_version}) STRING(REGEX REPLACE "^[0-9][0-9][0-9][0-9]([0-9][0-9][0-9])[a-z]*$" "\\1" _revision ${_version}) STRING(REGEX REPLACE "^[0-9][0-9][0-9][0-9][0-9][0-9][0-9]([a-z]*)$" "\\1" _quality ${_version}) SET(_version_number ${_major}${_minor}${_revision}) STRING(REGEX REPLACE "[0]*([^0]*[0-9])$" "\\1" _trimmed_minor ${_minor}) STRING(REGEX REPLACE "[0]*([^0]*[0-9])$" "\\1" _trimmed_revision ${_revision}) # SET(VERSION "${_major}.${_trimmed_minor}.${_trimmed_revision}${_quality}") SET(BSDCPIO_VERSION_STRING "${VERSION}") SET(BSDTAR_VERSION_STRING "${VERSION}") SET(BSDCAT_VERSION_STRING "${VERSION}") SET(LIBARCHIVE_VERSION_NUMBER "${_version_number}") SET(LIBARCHIVE_VERSION_STRING "${VERSION}") # INTERFACE_VERSION increments with every release # libarchive 2.7 == interface version 9 = 2 + 7 # libarchive 2.8 == interface version 10 = 2 + 8 # libarchive 2.9 == interface version 11 = 2 + 9 # libarchive 3.0 == interface version 12 # libarchive 3.1 == interface version 13 math(EXPR INTERFACE_VERSION "13 + ${_minor}") # Set SOVERSION == Interface version # ?? Should there be more here ?? SET(SOVERSION "${INTERFACE_VERSION}") # Enable CMAKE_PUSH_CHECK_STATE() and CMAKE_POP_CHECK_STATE() macros # saving and restoring the state of the variables. INCLUDE(${CMake_SOURCE_DIR}/Modules/CMakePushCheckState.cmake) # Initialize the state of the variables. This initialization is not # necessary but this shows you what value the variables initially have. SET(CMAKE_REQUIRED_DEFINITIONS) SET(CMAKE_REQUIRED_INCLUDES) SET(CMAKE_REQUIRED_LIBRARIES) SET(CMAKE_REQUIRED_FLAGS) # Disable warnings to avoid changing 3rd party code. IF(CMAKE_C_COMPILER_ID MATCHES "^(GNU|LCC|Clang|AppleClang|IBMClang|XLClang|XL|VisualAge|SunPro|HP|Intel|IntelLLVM|NVHPC)$") SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -w") ELSEIF(CMAKE_C_COMPILER_ID STREQUAL "PathScale") SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -woffall") ENDIF() # Activate POSIX APIs. if(CMAKE_SYSTEM_NAME MATCHES "^(Linux)$") add_definitions(-D_DEFAULT_SOURCE -D_BSD_SOURCE) string(APPEND CMAKE_REQUIRED_DEFINITIONS " -D_DEFAULT_SOURCE -D_BSD_SOURCE") endif() if(NOT CMAKE_SYSTEM_NAME MATCHES "BSD|Darwin|Windows") add_definitions(-D_XOPEN_SOURCE=600) string(APPEND CMAKE_REQUIRED_DEFINITIONS " -D_XOPEN_SOURCE=600") endif() IF(0) # CMake does not need flags specific to libarchive upstream development. if (CMAKE_BUILD_TYPE STREQUAL "Debug") OPTION(ENABLE_WERROR "Treat warnings as errors - default is ON for Debug, OFF otherwise." ON) else () OPTION(ENABLE_WERROR "Treat warnings as errors - default is ON for Debug, OFF otherwise." OFF) endif () # Especially for early development, we want to be a little # aggressive about diagnosing build problems; this can get # relaxed somewhat in final shipping versions. IF (CMAKE_C_COMPILER_ID MATCHES "^GNU$" OR CMAKE_C_COMPILER_ID MATCHES "^Clang$") SET(CMAKE_REQUIRED_FLAGS "-Wall -Wformat -Wformat-security") ################################################################# # Set compile flags for all build types. SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wformat -Wformat-security") if (ENABLE_WERROR) SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror") endif () ################################################################# # Set compile flags for debug build. # This is added into CMAKE_C_FLAGS when CMAKE_BUILD_TYPE is "Debug" SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -g") SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -Wextra") SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -Wunused") SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -Wshadow") SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -Wmissing-prototypes") SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -Wcast-qual") # Ideally this will be a compile/link time check, yet there's no obvious way # how considering how old our minimum required cmake version is. The official # cmake.org side does not host the manual pages even. Normally we can use # either of the following two, yet neither is supported as of 3.0.2 # - check_linker_flag - does not exist # - try_compile - does not support linker flags # # The CI fails with this on MacOS IF(NOT CMAKE_SYSTEM_NAME MATCHES "Darwin") # Place the functions and data into separate sections, allowing the linker # to garbage collect the unused ones. SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ffunction-sections -fdata-sections") SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections") SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--gc-sections") # Printing the discarded section is "too much", so enable on demand. #SET(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} -Wl,--print-gc-sections") #SET(CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG} -Wl,--print-gc-sections") ENDIF(NOT CMAKE_SYSTEM_NAME MATCHES "Darwin") ENDIF (CMAKE_C_COMPILER_ID MATCHES "^GNU$" OR CMAKE_C_COMPILER_ID MATCHES "^Clang$") IF (CMAKE_C_COMPILER_ID MATCHES "^XL$") SET(CMAKE_C_COMPILER "xlc_r") SET(CMAKE_REQUIRED_FLAGS "-qflag=e:e -qformat=sec") ################################################################# # Set compile flags for all build types. SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -qflag=e:e -qformat=sec") if (ENABLE_WERROR) SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -qhalt=w") endif () ################################################################# # Set compile flags for debug build. # This is added