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libgit2/CMakeLists.txt
Patrick Steinhardt 511fb9e6f8 cmake: always disable deprecation-sync warnings 
We currently disable deprecation synchronization warnings in case we're
building with Clang. We check for Clang by doing a string comparison on
the compiler identification, but this seems to have been broken by an
update in macOS' image as the compiler ID has changed to "AppleClang".
Let's just unconditionally disable this warning on Unix platforms. We
never add the deprecated attribute anyway, so the warning doesn't help
us at all.
2020-06-01 14:06:20 +02:00

312 lines
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CMake
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# CMake build script for the libgit2 project
#
# Building (out of source build):
# > mkdir build && cd build
# > cmake .. [-DSETTINGS=VALUE]
# > cmake --build .
#
# Testing:
# > ctest -V
#
# Install:
# > cmake --build . --target install
CMAKE_MINIMUM_REQUIRED(VERSION 3.5.1)
project(libgit2 C)
# Add find modules to the path
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${libgit2_SOURCE_DIR}/cmake/")
INCLUDE(CheckLibraryExists)
INCLUDE(CheckFunctionExists)
INCLUDE(CheckSymbolExists)
INCLUDE(CheckStructHasMember)
INCLUDE(CheckPrototypeDefinition) # Added in CMake 3.0
INCLUDE(AddCFlagIfSupported)
INCLUDE(FindPkgLibraries)
INCLUDE(FindThreads)
INCLUDE(FindStatNsec)
INCLUDE(GNUInstallDirs)
INCLUDE(IdeSplitSources)
INCLUDE(FeatureSummary)
INCLUDE(EnableWarnings)
# Build options
#
OPTION(SONAME "Set the (SO)VERSION of the target" ON)
OPTION(BUILD_SHARED_LIBS "Build Shared Library (OFF for Static)" ON)
OPTION(THREADSAFE "Build libgit2 as threadsafe" ON)
OPTION(BUILD_CLAR "Build Tests using the Clar suite" ON)
OPTION(BUILD_EXAMPLES "Build library usage example apps" OFF)
OPTION(BUILD_FUZZERS "Build the fuzz targets" OFF)
OPTION(ENABLE_TRACE "Enables tracing support" ON)
OPTION(LIBGIT2_FILENAME "Name of the produced binary" OFF)
OPTION(USE_SSH "Link with libssh2 to enable SSH support" ON)
OPTION(USE_HTTPS "Enable HTTPS support. Can be set to a specific backend" ON)
OPTION(USE_SHA1 "Enable SHA1. Can be set to CollisionDetection(ON)/HTTPS/Generic" ON)
OPTION(USE_GSSAPI "Link with libgssapi for SPNEGO auth" OFF)
OPTION(USE_STANDALONE_FUZZERS "Enable standalone fuzzers (compatible with gcc)" OFF)
OPTION(USE_LEAK_CHECKER "Run tests with leak checker" OFF)
OPTION(DEBUG_POOL "Enable debug pool allocator" OFF)
OPTION(ENABLE_WERROR "Enable compilation with -Werror" OFF)
OPTION(USE_BUNDLED_ZLIB "Use the bundled version of zlib" OFF)
SET(USE_HTTP_PARSER "" CACHE STRING "Specifies the HTTP Parser implementation; either system or builtin.")
OPTION(DEPRECATE_HARD "Do not include deprecated functions in the library" OFF)
SET(REGEX_BACKEND "" CACHE STRING "Regular expression implementation. One of regcomp_l, pcre2, pcre, regcomp, or builtin.")
IF (UNIX)
IF (NOT USE_HTTPS)
OPTION(USE_NTLMCLIENT "Enable NTLM support on Unix." OFF )
ELSE()
OPTION(USE_NTLMCLIENT "Enable NTLM support on Unix." ON )
ENDIF()
ENDIF()
IF (UNIX AND NOT APPLE)
OPTION(ENABLE_REPRODUCIBLE_BUILDS "Enable reproducible builds" OFF)
ENDIF()
IF (APPLE)
OPTION(USE_ICONV "Link with and use iconv library" ON)
ENDIF()
IF(MSVC)
# This option must match the settings used in your program, in particular if you
# are linking statically
OPTION(STATIC_CRT "Link the static CRT libraries" ON)
# If you want to embed a copy of libssh2 into libgit2, pass a
# path to libssh2
OPTION(EMBED_SSH_PATH "Path to libssh2 to embed (Windows)" OFF)
ENDIF()
IF(WIN32)
# By default, libgit2 is built with WinHTTP. To use the built-in
# HTTP transport, invoke CMake with the "-DWINHTTP=OFF" argument.
OPTION(WINHTTP "Use Win32 WinHTTP routines" ON)
ENDIF()
IF(MSVC)
# Enable MSVC CRTDBG memory leak reporting when in debug mode.
OPTION(MSVC_CRTDBG "Enable CRTDBG memory leak reporting" OFF)
ENDIF()
FILE(STRINGS "${libgit2_SOURCE_DIR}/include/git2/version.h" GIT2_HEADER REGEX "^#define LIBGIT2_VERSION \"[^\"]*\"$")
STRING(REGEX REPLACE "^.*LIBGIT2_VERSION \"([0-9]+).*$" "\\1" LIBGIT2_VERSION_MAJOR "${GIT2_HEADER}")
STRING(REGEX REPLACE "^.*LIBGIT2_VERSION \"[0-9]+\\.([0-9]+).*$" "\\1" LIBGIT2_VERSION_MINOR "${GIT2_HEADER}")
STRING(REGEX REPLACE "^.*LIBGIT2_VERSION \"[0-9]+\\.[0-9]+\\.([0-9]+).*$" "\\1" LIBGIT2_VERSION_REV "${GIT2_HEADER}")
SET(LIBGIT2_VERSION_STRING "${LIBGIT2_VERSION_MAJOR}.${LIBGIT2_VERSION_MINOR}.${LIBGIT2_VERSION_REV}")
FILE(STRINGS "${libgit2_SOURCE_DIR}/include/git2/version.h" GIT2_HEADER_SOVERSION REGEX "^#define LIBGIT2_SOVERSION \"([0-9.]+)\"$")
STRING(REGEX REPLACE "^.*LIBGIT2_SOVERSION \"([0-9.]+)\"$" "\\1" LIBGIT2_SOVERSION "${GIT2_HEADER_SOVERSION}")
IF (DEPRECATE_HARD)
ADD_DEFINITIONS(-DGIT_DEPRECATE_HARD)
ENDIF()
# Platform specific compilation flags
IF (MSVC)
IF (STDCALL)
MESSAGE(FATAL_ERROR "The STDCALL option is no longer supported; libgit2 is now always built as a cdecl library. If you're using PInvoke, please add the CallingConventions.Cdecl attribute for support.")
ENDIF()
ADD_DEFINITIONS(-D_SCL_SECURE_NO_WARNINGS)
ADD_DEFINITIONS(-D_CRT_SECURE_NO_DEPRECATE)
ADD_DEFINITIONS(-D_CRT_NONSTDC_NO_DEPRECATE)
STRING(REPLACE "/Zm1000" " " CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
# /GF - String pooling
# /MP - Parallel build
SET(CMAKE_C_FLAGS "/GF /MP /nologo ${CMAKE_C_FLAGS}")
# /Gd - explicitly set cdecl calling convention
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /Gd")
IF (NOT (MSVC_VERSION LESS 1900))
# /guard:cf - Enable Control Flow Guard
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /guard:cf")
ENDIF()
IF (STATIC_CRT)
SET(CRT_FLAG_DEBUG "/MTd")
SET(CRT_FLAG_RELEASE "/MT")
ELSE()
SET(CRT_FLAG_DEBUG "/MDd")
SET(CRT_FLAG_RELEASE "/MD")
ENDIF()
IF (MSVC_CRTDBG)
SET(GIT_MSVC_CRTDBG 1)
SET(CRT_FLAG_DEBUG "${CRT_FLAG_DEBUG}")
SET(CMAKE_C_STANDARD_LIBRARIES "${CMAKE_C_STANDARD_LIBRARIES} Dbghelp.lib")
ENDIF()
# /Zi - Create debugging information
# /Od - Disable optimization
# /D_DEBUG - #define _DEBUG
# /MTd - Statically link the multithreaded debug version of the CRT
# /MDd - Dynamically link the multithreaded debug version of the CRT
# /RTC1 - Run time checks
SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} /Zi /Od /D_DEBUG /RTC1 ${CRT_FLAG_DEBUG}")
# /DNDEBUG - Disables asserts
# /MT - Statically link the multithreaded release version of the CRT
# /MD - Dynamically link the multithreaded release version of the CRT
# /O2 - Optimize for speed
# /Oy - Enable frame pointer omission (FPO) (otherwise CMake will automatically turn it off)
# /GL - Link time code generation (whole program optimization)
# /Gy - Function-level linking
SET(CMAKE_C_FLAGS_RELEASE "/DNDEBUG /O2 /Oy /GL /Gy ${CRT_FLAG_RELEASE}")
# /Oy- - Disable frame pointer omission (FPO)
SET(CMAKE_C_FLAGS_RELWITHDEBINFO "/DNDEBUG /Zi /O2 /Oy- /GL /Gy ${CRT_FLAG_RELEASE}")
# /O1 - Optimize for size
SET(CMAKE_C_FLAGS_MINSIZEREL "/DNDEBUG /O1 /Oy /GL /Gy ${CRT_FLAG_RELEASE}")
# /IGNORE:4221 - Ignore empty compilation units
SET(CMAKE_STATIC_LINKER_FLAGS "/IGNORE:4221")
# /DYNAMICBASE - Address space load randomization (ASLR)
# /NXCOMPAT - Data execution prevention (DEP)
# /LARGEADDRESSAWARE - >2GB user address space on x86
# /VERSION - Embed version information in PE header
SET(CMAKE_EXE_LINKER_FLAGS "/DYNAMICBASE /NXCOMPAT /LARGEADDRESSAWARE /VERSION:${LIBGIT2_VERSION_MAJOR}.${LIBGIT2_VERSION_MINOR}")
IF (NOT (MSVC_VERSION LESS 1900))
# /GUARD:CF - Enable Control Flow Guard
SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /GUARD:CF")
ENDIF()
# /DEBUG - Create a PDB
# /LTCG - Link time code generation (whole program optimization)
# /OPT:REF /OPT:ICF - Fold out duplicate code at link step
# /INCREMENTAL:NO - Required to use /LTCG
# /DEBUGTYPE:cv,fixup - Additional data embedded in the PDB (requires /INCREMENTAL:NO, so not on for Debug)
SET(CMAKE_EXE_LINKER_FLAGS_DEBUG "/DEBUG")
SET(CMAKE_EXE_LINKER_FLAGS_RELEASE "/RELEASE /LTCG /OPT:REF /OPT:ICF /INCREMENTAL:NO")
SET(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "/DEBUG /RELEASE /LTCG /OPT:REF /OPT:ICF /INCREMENTAL:NO /DEBUGTYPE:cv,fixup")
SET(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "/RELEASE /LTCG /OPT:REF /OPT:ICF /INCREMENTAL:NO")
# Same linker settings for DLL as EXE
SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}")
SET(CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG}")
SET(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE}")
SET(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}")
SET(CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL}")
ELSE ()
IF (ENABLE_REPRODUCIBLE_BUILDS)
SET(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> Dqc <TARGET> <LINK_FLAGS> <OBJECTS>")
SET(CMAKE_C_ARCHIVE_APPEND "<CMAKE_AR> Dq <TARGET> <LINK_FLAGS> <OBJECTS>")
SET(CMAKE_C_ARCHIVE_FINISH "<CMAKE_RANLIB> -D <TARGET>")
ENDIF()
SET(CMAKE_C_FLAGS "-D_GNU_SOURCE ${CMAKE_C_FLAGS}")
ENABLE_WARNINGS(all)
ENABLE_WARNINGS(extra)
IF (CMAKE_SYSTEM_NAME MATCHES "(Solaris|SunOS)")
SET(CMAKE_C_FLAGS "-D_POSIX_C_SOURCE=200112L -D__EXTENSIONS__ -D_POSIX_PTHREAD_SEMANTICS ${CMAKE_C_FLAGS}")
ENDIF()
SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -D_DEBUG -O0")
IF (MINGW OR MSYS) # MinGW and MSYS always do PIC and complain if we tell them to
STRING(REGEX REPLACE "-fPIC" "" CMAKE_SHARED_LIBRARY_C_FLAGS "${CMAKE_SHARED_LIBRARY_C_FLAGS}")
ELSEIF (BUILD_SHARED_LIBS)
ADD_C_FLAG_IF_SUPPORTED(-fvisibility=hidden)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
ENDIF ()
IF (MINGW)
# MinGW >= 3.14 uses the C99-style stdio functions
# automatically, but forks like mingw-w64 still want
# us to define this in order to use them
ADD_DEFINITIONS(-D__USE_MINGW_ANSI_STDIO=1)
ENDIF ()
enable_warnings(documentation)
disable_warnings(documentation-deprecated-sync)
disable_warnings(missing-field-initializers)
enable_warnings(strict-aliasing)
enable_warnings(strict-prototypes)
enable_warnings(declaration-after-statement)
enable_warnings(shift-count-overflow)
enable_warnings(unused-const-variable)
enable_warnings(unused-function)
enable_warnings(int-conversion)
# MinGW uses gcc, which expects POSIX formatting for printf, but
# uses the Windows C library, which uses its own format specifiers.
# Disable format specifier warnings.
if(MINGW)
disable_warnings(format)
disable_warnings(format-security)
else()
enable_warnings(format)
enable_warnings(format-security)
endif()
ENDIF()
# Ensure that MinGW provides the correct header files.
IF (WIN32 AND NOT CYGWIN)
ADD_DEFINITIONS(-DWIN32 -D_WIN32_WINNT=0x0600)
ENDIF()
IF( NOT CMAKE_CONFIGURATION_TYPES )
# Build Debug by default
IF (NOT CMAKE_BUILD_TYPE)
SET(CMAKE_BUILD_TYPE "Debug" CACHE STRING "Choose the type of build, options are: Debug Release RelWithDebInfo MinSizeRel." FORCE)
ENDIF ()
ELSE()
# Using a multi-configuration generator eg MSVC or Xcode
# that uses CMAKE_CONFIGURATION_TYPES and not CMAKE_BUILD_TYPE
ENDIF()
IF(BUILD_FUZZERS AND NOT USE_STANDALONE_FUZZERS)
# The actual sanitizer link target will be added when linking the fuzz
# targets.
SET(CMAKE_REQUIRED_FLAGS "-fsanitize=fuzzer-no-link")
ADD_C_FLAG(-fsanitize=fuzzer-no-link)
UNSET(CMAKE_REQUIRED_FLAGS)
ENDIF ()
ADD_SUBDIRECTORY(src)
# Tests
IF (NOT MSVC)
IF (NOT BUILD_SHARED_LIBS)
SET(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
ENDIF()
ENDIF ()
IF (BUILD_CLAR)
ENABLE_TESTING()
ADD_SUBDIRECTORY(tests)
ENDIF ()
IF (BUILD_EXAMPLES)
ADD_SUBDIRECTORY(examples)
ENDIF ()
IF(BUILD_FUZZERS)
IF(NOT USE_STANDALONE_FUZZERS)
IF(BUILD_EXAMPLES)
MESSAGE(FATAL_ERROR "Cannot build the fuzzer targets and the examples together")
ENDIF()
IF(BUILD_CLAR)
MESSAGE(FATAL_ERROR "Cannot build the fuzzer targets and the tests together")
ENDIF()
ENDIF()
ADD_SUBDIRECTORY(fuzzers)
ENDIF()
FEATURE_SUMMARY(WHAT ENABLED_FEATURES DESCRIPTION "Enabled features:")
FEATURE_SUMMARY(WHAT DISABLED_FEATURES DESCRIPTION "Disabled features:")
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