thodg/libgit2/src/CMakeLists.txt

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• Hash : 19eb1e4b
  Author :
  Date : 2020-06-05T10:07:33
  

  cmake: specify project version We currently do not set up a project version within CMake, meaning that it can't be use by other projects including libgit2 as a sub-project and also not by other tools like IDEs. This commit changes this to always set up a project version, but instead of extracting it from the "version.h" header we now set it up directly. This is mostly to avoid mis-use of the previous `LIBGIT2_VERSION` variables, as we should now always use the `libgit2_VERSION` ones that are set up by CMake if one provides the "VERSION" keyword to the `project()` call. While this is one more moving target we need to adjust on releases, this commit also adjusts our release script to verify that the project version was incremented as expected.

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• src/CMakeLists.txt

• add_library(git2internal OBJECT)
  set_target_properties(git2internal PROPERTIES C_STANDARD 90)
  
  IF(DEBUG_POOL)
  	SET(GIT_DEBUG_POOL 1)
  ENDIF()
  ADD_FEATURE_INFO(debugpool GIT_DEBUG_POOL "debug pool allocator")
  
  INCLUDE(PkgBuildConfig)
  
  # This variable will contain the libraries we need to put into
  # libgit2.pc's Requires.private. That is, what we're linking to or
  # what someone who's statically linking us needs to link to.
  SET(LIBGIT2_PC_REQUIRES "")
  # This will be set later if we use the system's http-parser library or
  # use iconv (OSX) and will be written to the Libs.private field in the
  # pc file.
  SET(LIBGIT2_PC_LIBS "")
  
  SET(LIBGIT2_INCLUDES
  	"${CMAKE_CURRENT_BINARY_DIR}"
  	"${libgit2_SOURCE_DIR}/src"
  	"${libgit2_SOURCE_DIR}/include")
  SET(LIBGIT2_SYSTEM_INCLUDES "")
  SET(LIBGIT2_LIBS "")
  
  enable_warnings(missing-declarations)
  
  # Enable tracing
  IF(ENABLE_TRACE)
  	SET(GIT_TRACE 1)
  ENDIF()
  ADD_FEATURE_INFO(tracing GIT_TRACE "tracing support")
  
  CHECK_FUNCTION_EXISTS(futimens HAVE_FUTIMENS)
  IF (HAVE_FUTIMENS)
  	SET(GIT_USE_FUTIMENS 1)
  ENDIF ()
  
  CHECK_PROTOTYPE_DEFINITION(qsort_r
  	"void qsort_r(void *base, size_t nmemb, size_t size, void *thunk, int (*compar)(void *, const void *, const void *))"
  	"" "stdlib.h" HAVE_QSORT_R_BSD)
  IF (HAVE_QSORT_R_BSD)
  	target_compile_definitions(git2internal PRIVATE HAVE_QSORT_R_BSD)
  ENDIF()
  
  CHECK_PROTOTYPE_DEFINITION(qsort_r
  	"void qsort_r(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *, void *), void *arg)"
  	"" "stdlib.h" HAVE_QSORT_R_GNU)
  IF (HAVE_QSORT_R_GNU)
  	target_compile_definitions(git2internal PRIVATE HAVE_QSORT_R_GNU)
  ENDIF()
  
  CHECK_FUNCTION_EXISTS(qsort_s HAVE_QSORT_S)
  IF (HAVE_QSORT_S)
  	target_compile_definitions(git2internal PRIVATE HAVE_QSORT_S)
  ENDIF ()
  
  # Find required dependencies
  
  IF(WIN32)
  	LIST(APPEND LIBGIT2_LIBS ws2_32)
  ELSEIF(CMAKE_SYSTEM_NAME MATCHES "(Solaris|SunOS)")
  	LIST(APPEND LIBGIT2_LIBS socket nsl)
  	LIST(APPEND LIBGIT2_PC_LIBS "-lsocket" "-lnsl")
  ELSEIF(CMAKE_SYSTEM_NAME MATCHES "Haiku")
  	LIST(APPEND LIBGIT2_LIBS network)
  	LIST(APPEND LIBGIT2_PC_LIBS "-lnetwork")
  ENDIF()
  
  CHECK_LIBRARY_EXISTS(rt clock_gettime "time.h" NEED_LIBRT)
  IF(NEED_LIBRT)
  	LIST(APPEND LIBGIT2_LIBS rt)
  	LIST(APPEND LIBGIT2_PC_LIBS "-lrt")
  ENDIF()
  
  IF(THREADSAFE)
  	LIST(APPEND LIBGIT2_LIBS ${CMAKE_THREAD_LIBS_INIT})
  	LIST(APPEND LIBGIT2_PC_LIBS ${CMAKE_THREAD_LIBS_INIT})
  ENDIF()
  ADD_FEATURE_INFO(threadsafe THREADSAFE "threadsafe support")
  
  
  if(WIN32 AND EMBED_SSH_PATH)
  	file(GLOB SRC_SSH "${EMBED_SSH_PATH}/src/*.c")
  	list(SORT SRC_SSH)
  	target_sources(git2internal PRIVATE ${SRC_SSH})
  
  	list(APPEND LIBGIT2_SYSTEM_INCLUDES "${EMBED_SSH_PATH}/include")
  	file(WRITE "${EMBED_SSH_PATH}/src/libssh2_config.h" "#define HAVE_WINCNG\n#define LIBSSH2_WINCNG\n#include \"../win32/libssh2_config.h\"")
  	set(GIT_SSH 1)
  endif()
  
  IF (WIN32 AND WINHTTP)
  	SET(GIT_WINHTTP 1)
  
  	# Since MinGW does not come with headers or an import library for winhttp,
  	# we have to include a private header and generate our own import library
  	IF (MINGW)
  		ADD_SUBDIRECTORY("${libgit2_SOURCE_DIR}/deps/winhttp" "${libgit2_BINARY_DIR}/deps/winhttp")
  		LIST(APPEND LIBGIT2_LIBS winhttp)
  		LIST(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/winhttp")
  	ELSE()
  		LIST(APPEND LIBGIT2_LIBS "winhttp")
  		LIST(APPEND LIBGIT2_PC_LIBS "-lwinhttp")
  	ENDIF ()
  
  	LIST(APPEND LIBGIT2_LIBS "rpcrt4" "crypt32" "ole32")
  	LIST(APPEND LIBGIT2_PC_LIBS "-lrpcrt4" "-lcrypt32" "-lole32")
  ENDIF()
  
  include(SelectHTTPSBackend)
  include(SelectHashes)
  target_sources(git2internal PRIVATE ${SRC_SHA1})
  
  # Specify regular expression implementation
  FIND_PACKAGE(PCRE)
  
  IF(REGEX_BACKEND STREQUAL "")
  	CHECK_SYMBOL_EXISTS(regcomp_l "regex.h;xlocale.h" HAVE_REGCOMP_L)
  
  	IF(HAVE_REGCOMP_L)
  		SET(REGEX_BACKEND "regcomp_l")
  	ELSEIF(PCRE_FOUND)
  		SET(REGEX_BACKEND "pcre")
  	ELSE()
  		SET(REGEX_BACKEND "builtin")
  	ENDIF()
  ENDIF()
  
  IF(REGEX_BACKEND STREQUAL "regcomp_l")
  	ADD_FEATURE_INFO(regex ON "using system regcomp_l")
  	SET(GIT_REGEX_REGCOMP_L 1)
  ELSEIF(REGEX_BACKEND STREQUAL "pcre2")
  	FIND_PACKAGE(PCRE2)
  
  	IF(NOT PCRE2_FOUND)
  		MESSAGE(FATAL_ERROR "PCRE2 support was requested but not found")
  	ENDIF()
  
  	ADD_FEATURE_INFO(regex ON "using system PCRE2")
  	SET(GIT_REGEX_PCRE2 1)
  
  	LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${PCRE2_INCLUDE_DIRS})
  	LIST(APPEND LIBGIT2_LIBS ${PCRE2_LIBRARIES})
  	LIST(APPEND LIBGIT2_PC_REQUIRES "libpcre2-8")
  ELSEIF(REGEX_BACKEND STREQUAL "pcre")
  	ADD_FEATURE_INFO(regex ON "using system PCRE")
  	SET(GIT_REGEX_PCRE 1)
  
  	LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${PCRE_INCLUDE_DIRS})
  	LIST(APPEND LIBGIT2_LIBS ${PCRE_LIBRARIES})
  	LIST(APPEND LIBGIT2_PC_REQUIRES "libpcre")
  ELSEIF(REGEX_BACKEND STREQUAL "regcomp")
  	ADD_FEATURE_INFO(regex ON "using system regcomp")
  	SET(GIT_REGEX_REGCOMP 1)
  ELSEIF(REGEX_BACKEND STREQUAL "builtin")
  	ADD_FEATURE_INFO(regex ON "using bundled PCRE")
  	SET(GIT_REGEX_BUILTIN 1)
  
  	ADD_SUBDIRECTORY("${libgit2_SOURCE_DIR}/deps/pcre" "${libgit2_BINARY_DIR}/deps/pcre")
  	LIST(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/pcre")
  	LIST(APPEND LIBGIT2_OBJECTS $<TARGET_OBJECTS:pcre>)
  ELSE()
  	MESSAGE(FATAL_ERROR "The REGEX_BACKEND option provided is not supported")
  ENDIF()
  
  # Optional external dependency: http-parser
  IF(USE_HTTP_PARSER STREQUAL "system")
  	FIND_PACKAGE(HTTP_Parser)
  
  	IF (HTTP_PARSER_FOUND AND HTTP_PARSER_VERSION_MAJOR EQUAL 2)
  		LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${HTTP_PARSER_INCLUDE_DIRS})
  		LIST(APPEND LIBGIT2_LIBS ${HTTP_PARSER_LIBRARIES})
  		LIST(APPEND LIBGIT2_PC_LIBS "-lhttp_parser")
  		ADD_FEATURE_INFO(http-parser ON "http-parser support (system)")
  	ELSE()
  		MESSAGE(FATAL_ERROR "http-parser support was requested but not found")
  	ENDIF()
  ELSE()
  	MESSAGE(STATUS "http-parser version 2 was not found or disabled; using bundled 3rd-party sources.")
  	ADD_SUBDIRECTORY("${libgit2_SOURCE_DIR}/deps/http-parser" "${libgit2_BINARY_DIR}/deps/http-parser")
  	LIST(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/http-parser")
  	LIST(APPEND LIBGIT2_OBJECTS "$<TARGET_OBJECTS:http-parser>")
  	ADD_FEATURE_INFO(http-parser ON "http-parser support (bundled)")
  ENDIF()
  
  # Optional external dependency: zlib
  IF(NOT USE_BUNDLED_ZLIB)
  	FIND_PACKAGE(ZLIB)
  	IF(ZLIB_FOUND)
  		LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${ZLIB_INCLUDE_DIRS})
  		LIST(APPEND LIBGIT2_LIBS ${ZLIB_LIBRARIES})
  		IF(APPLE OR CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
  			LIST(APPEND LIBGIT2_PC_LIBS "-lz")
  		ELSE()
  			LIST(APPEND LIBGIT2_PC_REQUIRES "zlib")
  		ENDIF()
  		ADD_FEATURE_INFO(zlib ON "using system zlib")
  	ELSE()
  		MESSAGE(STATUS "zlib was not found; using bundled 3rd-party sources." )
  	ENDIF()
  ENDIF()
  IF(USE_BUNDLED_ZLIB OR NOT ZLIB_FOUND)
  	ADD_SUBDIRECTORY("${libgit2_SOURCE_DIR}/deps/zlib" "${libgit2_BINARY_DIR}/deps/zlib")
  	LIST(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/zlib")
  	LIST(APPEND LIBGIT2_OBJECTS $<TARGET_OBJECTS:zlib>)
  	ADD_FEATURE_INFO(zlib ON "using bundled zlib")
  ENDIF()
  
  # Optional external dependency: libssh2
  IF (USE_SSH)
  	FIND_PKGLIBRARIES(LIBSSH2 libssh2)
  ENDIF()
  IF (LIBSSH2_FOUND)
  	SET(GIT_SSH 1)
  	LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${LIBSSH2_INCLUDE_DIRS})
  	LIST(APPEND LIBGIT2_LIBS ${LIBSSH2_LIBRARIES})
  	LIST(APPEND LIBGIT2_PC_LIBS ${LIBSSH2_LDFLAGS})
  
  	CHECK_LIBRARY_EXISTS("${LIBSSH2_LIBRARIES}" libssh2_userauth_publickey_frommemory "${LIBSSH2_LIBRARY_DIRS}" HAVE_LIBSSH2_MEMORY_CREDENTIALS)
  	IF (HAVE_LIBSSH2_MEMORY_CREDENTIALS)
  		SET(GIT_SSH_MEMORY_CREDENTIALS 1)
  	ENDIF()
  ELSE()
  	MESSAGE(STATUS "LIBSSH2 not found. Set CMAKE_PREFIX_PATH if it is installed outside of the default search path.")
  ENDIF()
  ADD_FEATURE_INFO(SSH GIT_SSH "SSH transport support")
  
  # Optional external dependency: ntlmclient
  IF (USE_NTLMCLIENT)
  	SET(GIT_NTLM 1)
  	ADD_SUBDIRECTORY("${libgit2_SOURCE_DIR}/deps/ntlmclient" "${libgit2_BINARY_DIR}/deps/ntlmclient")
  	LIST(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/ntlmclient")
  	LIST(APPEND LIBGIT2_OBJECTS "$<TARGET_OBJECTS:ntlmclient>")
  ENDIF()
  ADD_FEATURE_INFO(ntlmclient GIT_NTLM "NTLM authentication support for Unix")
  
  # Optional external dependency: GSSAPI
  
  INCLUDE(SelectGSSAPI)
  
  # Optional external dependency: iconv
  IF (USE_ICONV)
  	FIND_PACKAGE(Iconv)
  ENDIF()
  IF (ICONV_FOUND)
  	SET(GIT_USE_ICONV 1)
  	LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${ICONV_INCLUDE_DIR})
  	LIST(APPEND LIBGIT2_LIBS ${ICONV_LIBRARIES})
  	LIST(APPEND LIBGIT2_PC_LIBS ${ICONV_LIBRARIES})
  ENDIF()
  ADD_FEATURE_INFO(iconv GIT_USE_ICONV "iconv encoding conversion support")
  
  
  IF (THREADSAFE)
  	IF (NOT WIN32)
  		FIND_PACKAGE(Threads REQUIRED)
  	ENDIF()
  
  	SET(GIT_THREADS 1)
  ENDIF()
  
  IF (USE_NSEC)
  	SET(GIT_USE_NSEC 1)
  ENDIF()
  
  IF (HAVE_STRUCT_STAT_ST_MTIM)
  	SET(GIT_USE_STAT_MTIM 1)
  ELSEIF (HAVE_STRUCT_STAT_ST_MTIMESPEC)
  	SET(GIT_USE_STAT_MTIMESPEC 1)
  ELSEIF (HAVE_STRUCT_STAT_ST_MTIME_NSEC)
  	SET(GIT_USE_STAT_MTIME_NSEC 1)
  ENDIF()
  
  target_compile_definitions(git2internal PRIVATE _FILE_OFFSET_BITS=64)
  
  # Collect sourcefiles
  file(GLOB SRC_H
  	"${libgit2_SOURCE_DIR}/include/git2.h"
  	"${libgit2_SOURCE_DIR}/include/git2/*.h"
  	"${libgit2_SOURCE_DIR}/include/git2/sys/*.h")
  list(SORT SRC_H)
  target_sources(git2internal PRIVATE ${SRC_H})
  
  # On Windows use specific platform sources
  if(WIN32 AND NOT CYGWIN)
  	SET(WIN_RC "win32/git2.rc")
  
  	file(GLOB SRC_OS win32/*.c win32/*.h)
  	list(SORT SRC_OS)
  	target_sources(git2internal PRIVATE ${SRC_OS})
  elseif(AMIGA)
  	target_compile_definitions(git2internal PRIVATE NO_ADDRINFO NO_READDIR_R NO_MMAP)
  else()
  	file(GLOB SRC_OS unix/*.c unix/*.h)
  	list(SORT SRC_OS)
  	target_sources(git2internal PRIVATE ${SRC_OS})
  endif()
  
  IF (USE_LEAK_CHECKER STREQUAL "valgrind")
  	target_compile_definitions(git2internal PRIVATE VALGRIND)
  ENDIF()
  
  file(GLOB SRC_GIT2 *.c *.h
  	allocators/*.c allocators/*.h
  	streams/*.c streams/*.h
  	transports/*.c transports/*.h
  	xdiff/*.c xdiff/*.h)
  list(SORT SRC_GIT2)
  target_sources(git2internal PRIVATE ${SRC_GIT2})
  
  IF(APPLE)
  	# The old Secure Transport API has been deprecated in macOS 10.15.
  	SET_SOURCE_FILES_PROPERTIES(streams/stransport.c PROPERTIES COMPILE_FLAGS -Wno-deprecated)
  ENDIF()
  
  # the xdiff dependency is not (yet) warning-free, disable warnings as
  # errors for the xdiff sources until we've sorted them out
  IF(MSVC)
  	SET_SOURCE_FILES_PROPERTIES(xdiff/xdiffi.c PROPERTIES COMPILE_FLAGS -WX-)
  	SET_SOURCE_FILES_PROPERTIES(xdiff/xutils.c PROPERTIES COMPILE_FLAGS -WX-)
  ENDIF()
  
  # Determine architecture of the machine
  IF (CMAKE_SIZEOF_VOID_P EQUAL 8)
  	SET(GIT_ARCH_64 1)
  ELSEIF (CMAKE_SIZEOF_VOID_P EQUAL 4)
  	SET(GIT_ARCH_32 1)
  ELSEIF (CMAKE_SIZEOF_VOID_P)
  	MESSAGE(FATAL_ERROR "Unsupported architecture (pointer size is ${CMAKE_SIZEOF_VOID_P} bytes)")
  ELSE()
  	MESSAGE(FATAL_ERROR "Unsupported architecture (CMAKE_SIZEOF_VOID_P is unset)")
  ENDIF()
  
  CONFIGURE_FILE(features.h.in git2/sys/features.h)
  
  IDE_SPLIT_SOURCES(git2internal)
  LIST(APPEND LIBGIT2_OBJECTS $<TARGET_OBJECTS:git2internal>)
  
  TARGET_INCLUDE_DIRECTORIES(git2internal PRIVATE ${LIBGIT2_INCLUDES} PUBLIC ${libgit2_SOURCE_DIR}/include)
  TARGET_INCLUDE_DIRECTORIES(git2internal SYSTEM PRIVATE ${LIBGIT2_SYSTEM_INCLUDES})
  
  SET(LIBGIT2_OBJECTS ${LIBGIT2_OBJECTS} PARENT_SCOPE)
  SET(LIBGIT2_INCLUDES ${LIBGIT2_INCLUDES} PARENT_SCOPE)
  SET(LIBGIT2_SYSTEM_INCLUDES ${LIBGIT2_SYSTEM_INCLUDES} PARENT_SCOPE)
  SET(LIBGIT2_LIBS ${LIBGIT2_LIBS} PARENT_SCOPE)
  
  IF(XCODE_VERSION)
  	# This is required for Xcode to actually link the libgit2 library
  	# when using only object libraries.
  	FILE(WRITE ${CMAKE_CURRENT_BINARY_DIR}/dummy.c "")
  	LIST(APPEND LIBGIT2_OBJECTS ${CMAKE_CURRENT_BINARY_DIR}/dummy.c)
  ENDIF()
  
  # Compile and link libgit2
  ADD_LIBRARY(git2 ${WIN_RC} ${LIBGIT2_OBJECTS})
  TARGET_LINK_LIBRARIES(git2 ${LIBGIT2_LIBS})
  
  SET_TARGET_PROPERTIES(git2 PROPERTIES C_STANDARD 90)
  SET_TARGET_PROPERTIES(git2 PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${libgit2_BINARY_DIR})
  SET_TARGET_PROPERTIES(git2 PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${libgit2_BINARY_DIR})
  SET_TARGET_PROPERTIES(git2 PROPERTIES ARCHIVE_OUTPUT_DIRECTORY ${libgit2_BINARY_DIR})
  
  # Workaround for Cmake bug #0011240 (see http://public.kitware.com/Bug/view.php?id=11240)
  # Win64+MSVC+static libs = linker error
  IF(MSVC AND GIT_ARCH_64 AND NOT BUILD_SHARED_LIBS)
    SET_TARGET_PROPERTIES(git2 PROPERTIES STATIC_LIBRARY_FLAGS "/MACHINE:x64")
  ENDIF()
  
  IDE_SPLIT_SOURCES(git2)
  
  if(SONAME)
  	set_target_properties(git2 PROPERTIES VERSION ${libgit2_VERSION})
  	set_target_properties(git2 PROPERTIES SOVERSION "${libgit2_VERSION_MAJOR}.${libgit2_VERSION_MINOR}")
  	if(LIBGIT2_FILENAME)
  		target_compile_definitions(git2internal PRIVATE LIBGIT2_FILENAME=\"${LIBGIT2_FILENAME}\")
  		set_target_properties(git2 PROPERTIES OUTPUT_NAME ${LIBGIT2_FILENAME})
  	elseif(DEFINED LIBGIT2_PREFIX)
  		set_target_properties(git2 PROPERTIES PREFIX "${LIBGIT2_PREFIX}")
  	endif()
  endif()
  
  PKG_BUILD_CONFIG(NAME libgit2
  	VERSION ${libgit2_VERSION}
  	DESCRIPTION "The git library, take 2"
  	LIBS_SELF git2
  	PRIVATE_LIBS ${LIBGIT2_PC_LIBS}
  	REQUIRES ${LIBGIT2_PC_REQUIRES}
  )
  
  IF (MSVC_IDE)
     # Precompiled headers
     SET_TARGET_PROPERTIES(git2 PROPERTIES COMPILE_FLAGS "/Yuprecompiled.h /FIprecompiled.h")
     SET_SOURCE_FILES_PROPERTIES(win32/precompiled.c COMPILE_FLAGS "/Ycprecompiled.h")
  ENDIF ()
  
  # Install
  INSTALL(TARGETS git2
  	RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
  	LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
  	ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
  )
  INSTALL(DIRECTORY ${libgit2_SOURCE_DIR}/include/git2 DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
  INSTALL(FILES ${libgit2_SOURCE_DIR}/include/git2.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
  

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