PROJECT(libgit2 C)

CMAKE_MINIMUM_REQUIRED(VERSION 2.8.11)

CMAKE_POLICY(SET CMP0015 NEW)

IF (POLICY CMP0051)

CMAKE_POLICY(SET CMP0051 NEW)

ENDIF()

IF (POLICY CMP0042)

CMAKE_POLICY(SET CMP0042 NEW)

ENDIF()

SET(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${libgit2_SOURCE_DIR}/cmake/Modules/")

INCLUDE(CheckLibraryExists)

INCLUDE(CheckFunctionExists)

INCLUDE(CheckSymbolExists)

INCLUDE(CheckStructHasMember)

INCLUDE(AddCFlagIfSupported)

INCLUDE(FindPkgConfig)

INCLUDE(FindThreads)

INCLUDE(FindStatNsec)

INCLUDE(IdeSplitSources)

INCLUDE(FeatureSummary)

INCLUDE(EnableWarnings)

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( TAGS "Generate tags" OFF )

OPTION( PROFILE "Generate profiling information" OFF )

OPTION( ENABLE_TRACE "Enables tracing support" OFF )

OPTION( LIBGIT2_FILENAME "Name of the produced binary" OFF )

SET(SHA1_BACKEND "CollisionDetection" CACHE STRING "Backend to use for SHA1. One of Generic, OpenSSL, Win32, CommonCrypto, CollisionDetection. ")

OPTION( USE_SSH "Link with libssh to enable SSH support" ON )

OPTION( USE_HTTPS "Enable HTTPS support. Can be set to a specific backend" ON )

OPTION( USE_GSSAPI "Link with libgssapi for SPNEGO auth" OFF )

OPTION( VALGRIND "Configure build for valgrind" OFF )

OPTION( CURL "Use curl for HTTP if available" ON)

OPTION( USE_EXT_HTTP_PARSER "Use system HTTP_Parser if available" ON)

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 )

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 is only available when building with MSVC. By default, libgit2

# is build using the cdecl calling convention, which is useful if you're

# writing C. However, the CLR and Win32 API both expect stdcall.

#

# If you are writing a CLR program and want to link to libgit2, you'll want

# to turn this on by invoking CMake with the "-DSTDCALL=ON" argument.

OPTION( STDCALL "Build libgit2 with the __stdcall convention" OFF )

# 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 (MSVC)

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}")

IF (STDCALL)

# /Gz - stdcall calling convention

SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /Gz")

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}")

# /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}")

# /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 "-std=c99 -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(missing-field-initializers)

ENABLE_WARNINGS(strict-aliasing)

ENABLE_WARNINGS(strict-prototypes)

ENABLE_WARNINGS(declaration-after-statement)

ENABLE_WARNINGS(shift-count-overflow)

DISABLE_WARNINGS(unused-const-variable)

DISABLE_WARNINGS(unused-function)

IF (APPLE) # Apple deprecated OpenSSL

DISABLE_WARNINGS(deprecated-declarations)

ENDIF()

IF (PROFILE)

SET(CMAKE_C_FLAGS "-pg ${CMAKE_C_FLAGS}")

SET(CMAKE_EXE_LINKER_FLAGS "-pg ${CMAKE_EXE_LINKER_FLAGS}")

ENDIF ()

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()

ADD_SUBDIRECTORY(src)

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 (TAGS)

FIND_PROGRAM(CTAGS ctags)

IF (NOT CTAGS)

MESSAGE(FATAL_ERROR "Could not find ctags command")

ENDIF ()

FILE(GLOB_RECURSE SRC_ALL *.[ch])

ADD_CUSTOM_COMMAND(

OUTPUT tags

COMMAND ${CTAGS} -a ${SRC_ALL}

DEPENDS ${SRC_ALL}

)

ADD_CUSTOM_TARGET(

do_tags ALL

DEPENDS tags

)

ENDIF ()

IF (BUILD_EXAMPLES)

ADD_SUBDIRECTORY(examples)

ENDIF ()

IF(CMAKE_VERSION VERSION_GREATER 3)

FEATURE_SUMMARY(WHAT ENABLED_FEATURES DESCRIPTION "Enabled features:")

FEATURE_SUMMARY(WHAT DISABLED_FEATURES DESCRIPTION "Disabled features:")

ELSE()

PRINT_ENABLED_FEATURES()

PRINT_DISABLED_FEATURES()

ENDIF()