Add CMake build system for libobjc2. This will replace the existing build
systems after some further testing. Currently, we have three build systems for libobjc2: - GNUmakefile, which provides a number of options but not very cleanly (i.e. the only way of knowing what they are is to read the source) and doesn't correctly build the Objective-C++ runtime. - Makefile, which works correctly for a single configuration, but requires tweaking by hand to build others. - Makefile.clang, which is experimental, doesn't really work, and confuses people. The new CMake system: - Correctly installs in a GNUstep location if one exists, or in a system location otherwise. This is configurable at build time. - Provides inspectable options for all of the configuration choices (run ccmake to see them all) - Easily supports cross-compilation and out-of-tree builds - Is easy to extend and inspect - Automatically builds the LLVM optimisations (which already use CMake, as it's the only clean way of building LLVM optimisations out of tree) and can be easily configured not to if they are not required. - Will build a single libobjc.so for platforms that provide a separate C++ runtime and a separate libobjcxx for ones that don't. - Can generate build files for make, ninja, XCode, Eclipse, and Visual Studio For those unfamiliar with CMake, the best way of building is an out-of-tree build. For the simplest case, it's just a matter of: $ mkdir build $ cd build $ cmake .. $ make $ sudo -E make install If you wish to edit any of the configuration options, the easiest way is to run ccmake instead of cmake. You can also run ccmake . from the build directory to edit the options after initial configuration. For faster builds , try using ninja instead of make. Add -G Ninja to the [c]cmake command line and then run ninja instead of make.main
theraven
13 years ago
parent
713957f9d2
commit
3081618c47
@ -0,0 +1,218 @@
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cmake_minimum_required(VERSION 2.8)
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project(libobjc)
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list(INSERT CMAKE_C_FLAGS_DEBUG 0 "-g -O0 -fno-inline")
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list(INSERT CMAKE_C_FLAGS_RELEASE 0 "-O3")
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list(APPEND CMAKE_C_FLAGS "-std=gnu99")
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set(libobjc_VERSION 4.6)
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add_definitions(
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-DGNUSTEP -D__OBJC_RUNTIME_INTERNAL__=1 -D_XOPEN_SOURCE=500 -D__BSD_VISIBLE=1 -D_BSD_SOURCE=1)
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set(libobjc_ASM_SRCS
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block_trampolines.S
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objc_msgSend.S)
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set(libobjc_OBJC_SRCS
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NSBlocks.m
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Protocol2.m
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arc.m
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associate.m
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blocks_runtime.m
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properties.m)
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set(libobjc_C_SRCS
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abi_version.c
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alias_table.c
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block_to_imp.c
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caps.c
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category_loader.c
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class_table.c
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dtable.c
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eh_personality.c
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encoding2.c
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gc_none.c
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hash_table.c
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hooks.c
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ivar.c
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legacy_malloc.c
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loader.c
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mutation.m
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protocol.c
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runtime.c
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sarray2.c
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selector_table.c
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sendmsg2.c
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statics_loader.c
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toydispatch.c)
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set(libobjc_HDRS
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objc/Availability.h
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objc/Object.h
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objc/Protocol.h
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objc/blocks_private.h
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objc/blocks_runtime.h
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objc/capabilities.h
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objc/developer.h
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objc/encoding.h
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objc/hooks.h
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objc/objc-api.h
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objc/objc-arc.h
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objc/objc-auto.h
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objc/objc.h
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objc/runtime-deprecated.h
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objc/runtime.h
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objc/slot.h
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)
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set(libobjcxx_CXX_SRCS objcxx_eh.cc)
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# For release builds, we disable spamming the terminal with warnings about
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# selector type mismatches
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if (CMAKE_BUILD_TYPE STREQUAL Release)
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ADD_DEFINITIONS(-DNO_SELECTOR_MISMATCH_WARNINGS)
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else ()
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ADD_DEFINITIONS(-DGC_DEBUG)
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endif ()
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set(TYPE_DEPENDENT_DISPATCH TRUE CACHE BOOL
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"Enable type-dependent dispatch")
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if (TYPE_DEPENDENT_DISPATCH)
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add_definitions(-DTYPE_DEPENDENT_DISPATCH)
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endif ()
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set(LOW_MEMORY FALSE CACHE BOOL
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"Enable low-memory profile *HIGHLY EXPERIMENTAL*")
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if (LOW_MEMORY)
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add_definitions(-D__OBJC_LOW_MEMORY__)
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endif ()
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set(BOEHM_GC FALSE CACHE BOOL
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"Enable garbage collection support (not recommended)")
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if (BOEHM_GC)
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include(FindPkgConfig)
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pkg_check_modules(GC REQUIRED bdw-gc)
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link_directories(${GC_LIBRARY_DIRS})
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# If there's a threaded version, use it
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find_library(LIBGC gc-threaded PATHS "${GC_LIBRARY_DIRS}")
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if (LIBGC)
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else ()
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find_library(LIBGC gc PATHS GC_LIBRARY_DIRS)
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endif ()
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message("-- Using Boehm GC library: ${LIBGC}")
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include_directories(GC_INCLUDE_DIRS)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${GC_CFLAGS}")
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set(CMAKE_OBJC_FLAGS "${CMAKE_OBJC_FLAGS} -fobjc-gc")
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set(CMAKE_LINK_FLAGS "${CMAKE_LINK_FLAGS} ${GC_CFLAGS}")
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add_definitions(-DENABLE_GC)
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endif ()
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set(LEGACY_COMPAT FALSE CACHE BOOL
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"Enable legacy compatibility features")
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if (LEGACY_COMPAT)
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list(APPEND libobjc_C_SRCS legacy_malloc.c)
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else ()
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add_definitions(-DNO_LEGACY)
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endif ()
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set(LLVM_OPTS TRUE CACHE BOOL
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"Build LLVM Objective-C optimisations")
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if (LLVM_OPTS)
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add_subdirectory(opts)
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endif ()
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if (${CMAKE_C_COMPILER_ID} MATCHES Clang*)
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set(CMAKE_OBJC_FLAGS "${CMAKE_OBJC_FLAGS} -Wno-deprecated-objc-isa-usage -Wno-objc-root-class")
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else (${CMAKE_C_COMPILER_ID} MATCHES Clang*)
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MESSAGE("WARNING: It is strongly recommended that you compile with clang")
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endif (${CMAKE_C_COMPILER_ID} MATCHES Clang*)
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set_source_files_properties(
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${libobjc_OBJC_SRCS}
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PROPERTIES LANGUAGE C
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COMPILE_FLAGS "${CMAKE_OBJC_FLAGS}"
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)
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#
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# C++ Runtime interaction
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#
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# Try to find libcxxrt.so. We can link to this to provide the C++ ABI layer,
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# if it exists.
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find_library(CXX_RUNTIME cxxrt)
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# If it doesn't, then look for GNU libsupc++.so instead (either works, they're
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# ABI compatible).
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if (NOT CXX_RUNTIME)
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find_library(CXX_RUNTIME supc++)
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endif (NOT CXX_RUNTIME)
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# If we have a C++ ABI library, then we can produce a single libobjc that works
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# for Objective-C and Objective-C++. If not, then we need to provide a
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# separate libobjcxx.
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if (CXX_RUNTIME)
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message("-- Using ${CXX_RUNTIME} as the C++ runtime library")
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set(libobjc_CXX_SRCS ${libobjcxx_CXX_SRCS})
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# We don't want to link the STL implementation (e.g. libstdc++) if we have
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# a separate C++ runtime.
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set(CMAKE_CXX_IMPLICIT_LINK_LIBRARIES "")
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else (CXX_RUNTIME)
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message("-- No C++ runtime library found")
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add_library(objcxx SHARED ${libobjcxx_CXX_SRCS})
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set_target_properties(objcxx PROPERTIES
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LINKER_LANGUAGE C
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SOVERSION ${libobjc_VERSION}
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)
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endif (CXX_RUNTIME)
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add_library(objc SHARED ${libobjc_C_SRCS} ${libobjc_ASM_SRCS} ${libobjc_OBJC_SRCS} ${libobjc_CXX_SRCS} ${libobjc_HDRS})
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set_target_properties(objc PROPERTIES
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LINKER_LANGUAGE C
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PUBLIC_HEADER "${libobjc_HDRS}"
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SOVERSION ${libobjc_VERSION}
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)
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# Currently, we actually need pthreads, but we should use the platform's native
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# threading implementation (we do for everything except thread-local storage)
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set(CMAKE_THREAD_PREFER_PTHREAD)
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include(FindThreads)
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list(APPEND CMAKE_LINK_FLAGS CMAKE_THREAD_LIBS_INIT)
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# Explicitly link the C++ runtime and libgc if we are compiling with gc support.
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target_link_libraries(objc ${CXX_RUNTIME})
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if (LIBGC)
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target_link_libraries(objc ${LIBGC})
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endif ()
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#
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# Installation
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#
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set(GNUSTEP_LOCAL_ROOT "$ENV{GNUSTEP_LOCAL_ROOT}")
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set(GNUSTEP_SYSTEM_ROOT "$ENV{GNUSTEP_SYSTEM_ROOT}")
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# If we have GNUstep environment variables, then default to installing in the
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# GNUstep local environment.
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if (GNUSTEP_LOCAL_ROOT)
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set(DEFAULT_INSTALL_TYPE "Local")
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else ()
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set(DEFAULT_INSTALL_TYPE "None")
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endif ()
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set(GNUSTEP_INSTALL_TYPE ${DEFAULT_INSTALL_TYPE} CACHE STRING
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"GNUstep installation type. Options are None, System or Local.")
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if (${GNUSTEP_INSTALL_TYPE} STREQUAL "System")
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SET(LIB_INSTALL_PATH "${GNUSTEP_SYSTEM_ROOT}/Library/Libraries")
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SET(HEADER_INSTALL_PATH "${GNUSTEP_SYSTEM_ROOT}/Library/Headers")
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elseif (${GNUSTEP_INSTALL_TYPE} STREQUAL "Local")
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SET(LIB_INSTALL_PATH "${GNUSTEP_SYSTEM_ROOT}/Library/Libraries")
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SET(HEADER_INSTALL_PATH "${GNUSTEP_SYSTEM_ROOT}/Library/Headers")
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else ()
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SET(LIB_INSTALL_PATH lib)
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SET(HEADER_INSTALL_PATH "include/objc")
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elseif (${GNUSTEP_INSTALL_TYPE} EQUAL "Local")
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endif ()
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install(TARGETS objc
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LIBRARY DESTINATION ${LIB_INSTALL_PATH}
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ARCHIVE DESTINATION ${LIB_INSTALL_PATH}
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PUBLIC_HEADER DESTINATION ${HEADER_INSTALL_PATH})
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