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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 VERSION "1.0.1" LANGUAGES 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()
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:")
|
