[PATCH] Add a cmake build system.
Dan Albert
danalbert at google.com
Thu Jun 26 23:45:32 PDT 2014
I've tested that this builds both in the tree and standalone on Linux and
OS X.
On Thu Jun 26 2014 at 11:43:25 PM, Dan Albert <danalbert at google.com> wrote:
> No longer have to perform a full rebuild every time. This also makes
> building on Linux simpler, and allows building libcxxabi to be built
> from within the llvm tree (under projects/).
>
> This does not yet support building the unwinder in src/Unwind. That will
> be added in a later patch. Will also add support for tests with lit in a
> later patch.
> ---
> CMakeLists.txt | 214 ++++++++++++++++++++++++++++++
> ++++++++++++++++++++
> cmake/config-ix.cmake | 27 +++++++
> src/CMakeLists.txt | 74 +++++++++++++++++
> www/index.html | 10 +++
> 4 files changed, 325 insertions(+)
> create mode 100644 CMakeLists.txt
> create mode 100644 cmake/config-ix.cmake
> create mode 100644 src/CMakeLists.txt
>
> diff --git a/CMakeLists.txt b/CMakeLists.txt
> new file mode 100644
> index 0000000..26c4d91
> --- /dev/null
> +++ b/CMakeLists.txt
> @@ -0,0 +1,214 @@
> +#==========================================================
> =====================
> +# Setup Project
> +#==========================================================
> =====================
> +
> +cmake_minimum_required(VERSION 2.8.11)
> +
> +if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
> + project(libcxxabi)
> +
> + # Rely on llvm-config.
> + set(CONFIG_OUTPUT)
> + find_program(LLVM_CONFIG "llvm-config")
> + if(LLVM_CONFIG)
> + message(STATUS "Found LLVM_CONFIG as ${LLVM_CONFIG}")
> + set(CONFIG_COMMAND ${LLVM_CONFIG}
> + "--bindir"
> + "--libdir"
> + "--prefix"
> + "--src-root")
> + execute_process(
> + COMMAND ${CONFIG_COMMAND}
> + RESULT_VARIABLE HAD_ERROR
> + OUTPUT_VARIABLE CONFIG_OUTPUT
> + )
> + if(NOT HAD_ERROR)
> + string(REGEX REPLACE
> + "[ \t]*[\r\n]+[ \t]*" ";"
> + CONFIG_OUTPUT ${CONFIG_OUTPUT})
> + else()
> + string(REPLACE ";" " " CONFIG_COMMAND_STR "${CONFIG_COMMAND}")
> + message(STATUS "${CONFIG_COMMAND_STR}")
> + message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
> + endif()
> + else()
> + message(FATAL_ERROR "llvm-config not found -- ${LLVM_CONFIG}")
> + endif()
> +
> + list(GET CONFIG_OUTPUT 0 TOOLS_BINARY_DIR)
> + list(GET CONFIG_OUTPUT 1 LIBRARY_DIR)
> + list(GET CONFIG_OUTPUT 2 LLVM_OBJ_ROOT)
> + list(GET CONFIG_OUTPUT 3 MAIN_SRC_DIR)
> +
> + set(LLVM_TOOLS_BINARY_DIR ${TOOLS_BINARY_DIR} CACHE PATH "Path to
> llvm/bin")
> + set(LLVM_LIBRARY_DIR ${LIBRARY_DIR} CACHE PATH "Path to llvm/lib")
> + set(LLVM_BINARY_DIR ${LLVM_OBJ_ROOT} CACHE PATH "Path to LLVM build
> tree")
> + set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source
> tree")
> +
> + set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR}/share/llvm/cmake")
> + set(LLVMCONFIG_FILE "${LLVM_CMAKE_PATH}/LLVMConfig.cmake")
> + if(EXISTS ${LLVMCONFIG_FILE})
> + list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
> + include(${LLVMCONFIG_FILE})
> + else()
> + message(FATAL_ERROR "Not found: ${LLVMCONFIG_FILE}")
> + endif()
> +
> + set(PACKAGE_NAME libcxxabi)
> + set(PACKAGE_VERSION "${LLVM_PACKAGE_VERSION}")
> + set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
> + set(PACKAGE_BUGREPORT "llvmbugs at cs.uiuc.edu")
> +
> + if(EXISTS ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
> + set(LLVM_LIT ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
> + else()
> + # Seek installed Lit.
> + find_program(LLVM_LIT "lit.py" ${LLVM_MAIN_SRC_DIR}/utils/lit
> + DOC "Path to lit.py")
> + endif()
> +
> + if(LLVM_LIT)
> + # Define the default arguments to use with 'lit', and an option for
> the user
> + # to override.
> + set(LIT_ARGS_DEFAULT "-sv")
> + if (MSVC OR XCODE)
> + set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
> + endif()
> + set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options
> for lit")
> +
> + # On Win32 hosts, provide an option to specify the path to the
> GnuWin32 tools.
> + if( WIN32 AND NOT CYGWIN )
> + set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools")
> + endif()
> + else()
> + set(LLVM_INCLUDE_TESTS OFF)
> + endif()
> +
> + set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
> + set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
> +
> + set(LIBCXXABI_BUILT_STANDALONE 1)
> +endif()
> +
> +#==========================================================
> =====================
> +# Setup CMake Options
> +#==========================================================
> =====================
> +
> +# Define options.
> +option(LIBCXXABI_ENABLE_RTTI "Use run time type information." ON)
> +option(LIBCXXABI_ENABLE_ASSERTIONS "Enable assertions independent of
> build mode." ON)
> +option(LIBCXXABI_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
> +option(LIBCXXABI_ENABLE_WERROR "Fail and stop if a warning is
> triggered." OFF)
> +option(LIBCXXABI_ENABLE_CXX11 "Enable -std=c++11 and use of c++11
> language features if the compiler supports it." ON)
> +option(LIBCXXABI_ENABLE_SHARED "Build libc++abi as a shared library." ON)
> +
> +#==========================================================
> =====================
> +# Configure System
> +#==========================================================
> =====================
> +
> +# Add path for custom modules
> +set(CMAKE_MODULE_PATH
> + "${CMAKE_CURRENT_SOURCE_DIR}/cmake"
> + "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
> + ${CMAKE_MODULE_PATH}
> + )
> +
> +# Configure compiler.
> +include(config-ix)
> +
> +#==========================================================
> =====================
> +# Setup Compiler Flags
> +#==========================================================
> =====================
> +
> +# Get required flags.
> +macro(append_if list condition var)
> + if (${condition})
> + list(APPEND ${list} ${var})
> + endif()
> +endmacro()
> +
> +if (LIBCXXABI_HAS_NOSTDINCXX_FLAG)
> + list(APPEND LIBCXXABI_CXX_REQUIRED_FLAGS -nostdinc++)
> +endif()
> +if (LIBCXXABI_ENABLE_CXX11 AND LIBCXXABI_HAS_STDCXX11_FLAG)
> + list(APPEND LIBCXXABI_CXX_REQUIRED_FLAGS -std=c++11)
> +endif()
> +
> +# Get warning flags
> +if (NOT MSVC)
> + append_if(LIBCXXABI_CXX_WARNING_FLAGS LIBCXXABI_HAS_WALL_FLAG -Wall)
> + append_if(LIBCXXABI_CXX_WARNING_FLAGS LIBCXXABI_HAS_WNO_UNUSED_FUNCTION_FLAG
> -Wno-unused-function)
> + list(APPEND LIBCXXABI_CXX_REQUIRED_FLAGS -Werror=return-type)
> +endif()
> +
> +append_if(LIBCXXABI_CXX_WARNING_FLAGS LIBCXXABI_HAS_W_FLAG -W)
> +append_if(LIBCXXABI_CXX_WARNING_FLAGS LIBCXXABI_HAS_WNO_UNUSED_PARAMETER_FLAG
> -Wno-unused-parameter)
> +append_if(LIBCXXABI_CXX_WARNING_FLAGS LIBCXXABI_HAS_WWRITE_STRINGS_FLAG
> -Wwrite-strings)
> +append_if(LIBCXXABI_CXX_WARNING_FLAGS LIBCXXABI_HAS_WNO_LONG_LONG_FLAG
> -Wno-long-long)
> +if (LIBCXXABI_ENABLE_WERROR)
> + append_if(LIBCXXABI_CXX_WARNING_FLAGS LIBCXXABI_HAS_WERROR_FLAG
> -Werror)
> + append_if(LIBCXXABI_CXX_WARNING_FLAGS LIBCXXABI_HAS_WX_FLAG -WX)
> +else()
> + append_if(LIBCXXABI_CXX_WARNING_FLAGS LIBCXXABI_HAS_WNO_ERROR_FLAG
> -Wno-error)
> + append_if(LIBCXXABI_CXX_WARNING_FLAGS LIBCXXABI_HAS_NO_WX_FLAG -WX-)
> +endif()
> +if (LIBCXXABI_ENABLE_PEDANTIC)
> + append_if(LIBCXXABI_CXX_WARNING_FLAGS LIBCXXABI_HAS_PEDANTIC_FLAG
> -pedantic)
> +endif()
> +
> +# Get feature flags.
> +# Exceptions
> +# Catches C++ exceptions only and tells the compiler to assume that
> extern C
> +# functions never throw a C++ exception.
> +append_if(LIBCXXABI_CXX_FEATURE_FLAGS LIBCXXABI_HAS_EHSC_FLAG -EHsc)
> +# RTTI
> +if (NOT LIBCXXABI_ENABLE_RTTI)
> + list(APPEND LIBCXXABI_CXX_FEATURE_FLAGS -D_LIBCPP_NO_RTTI)
> + append_if(LIBCXXABI_CXX_FEATURE_FLAGS LIBCXXABI_HAS_NO_GR_FLAG -GR-)
> + append_if(LIBCXXABI_CXX_FEATURE_FLAGS LIBCXXABI_HAS_FNO_RTTI_FLAG
> -fno-rtti)
> +endif()
> +# Assert
> +string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
> +if (LIBCXXABI_ENABLE_ASSERTIONS)
> + # MSVC doesn't like _DEBUG on release builds. See PR 4379.
> + if (NOT MSVC)
> + list(APPEND LIBCXXABI_CXX_FEATURE_FLAGS -D_DEBUG)
> + endif()
> + # On Release builds cmake automatically defines NDEBUG, so we
> + # explicitly undefine it:
> + if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
> + list(APPEND LIBCXXABI_CXX_FEATURE_FLAGS -UNDEBUG)
> + endif()
> +else()
> + if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
> + list(APPEND LIBCXXABI_CXX_FEATURE_FLAGS -DNDEBUG)
> + endif()
> +endif()
> +# Static library
> +if (NOT LIBCXXABI_ENABLE_SHARED)
> + list(APPEND LIBCXXABI_CXX_FEATURE_FLAGS -D_LIBCPP_BUILD_STATIC)
> +endif()
> +
> +# This is the _ONLY_ place where add_definitions is called.
> +if (MSVC)
> + add_definitions(-D_CRT_SECURE_NO_WARNINGS)
> +endif()
> +
> +string(REPLACE ";" " " LIBCXXABI_CXX_REQUIRED_FLAGS
> "${LIBCXXABI_CXX_REQUIRED_FLAGS}")
> +set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXXABI_CXX_REQUIRED_FLAGS}")
> +
> +string(REPLACE ";" " " LIBCXXABI_CXX_WARNING_FLAGS
> "${LIBCXXABI_CXX_WARNING_FLAGS}")
> +set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXXABI_CXX_WARNING_FLAGS}")
> +
> +string(REPLACE ";" " " LIBCXXABI_CXX_FEATURE_FLAGS
> "${LIBCXXABI_CXX_FEATURE_FLAGS}")
> +set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXXABI_CXX_FEATURE_FLAGS}")
> +
> +#==========================================================
> =====================
> +# Setup Source Code
> +#==========================================================
> =====================
> +
> +include_directories(include)
> +
> +# Add source code. This also contains all of the logic for deciding
> linker flags
> +# soname, etc...
> +add_subdirectory(src)
> diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
> new file mode 100644
> index 0000000..96da3f5
> --- /dev/null
> +++ b/cmake/config-ix.cmake
> @@ -0,0 +1,27 @@
> +include(CheckLibraryExists)
> +include(CheckCXXCompilerFlag)
> +
> +# Check compiler flags
> +check_cxx_compiler_flag(-std=c++11
> LIBCXXABI_HAS_STDCXX11_FLAG)
> +check_cxx_compiler_flag(-fPIC LIBCXXABI_HAS_FPIC_FLAG)
> +check_cxx_compiler_flag(-nodefaultlibs
> LIBCXXABI_HAS_NODEFAULTLIBS_FLAG)
> +check_cxx_compiler_flag(-nostdinc++
> LIBCXXABI_HAS_NOSTDINCXX_FLAG)
> +check_cxx_compiler_flag(-Wall LIBCXXABI_HAS_WALL_FLAG)
> +check_cxx_compiler_flag(-W LIBCXXABI_HAS_W_FLAG)
> +check_cxx_compiler_flag(-Wno-unused-function LIBCXXABI_HAS_WNO_UNUSED_
> FUNCTION_FLAG)
> +check_cxx_compiler_flag(-Wno-unused-parameter LIBCXXABI_HAS_WNO_UNUSED_
> PARAMETER_FLAG)
> +check_cxx_compiler_flag(-Wwrite-strings
> LIBCXXABI_HAS_WWRITE_STRINGS_FLAG)
> +check_cxx_compiler_flag(-Wno-long-long
> LIBCXXABI_HAS_WNO_LONG_LONG_FLAG)
> +check_cxx_compiler_flag(-pedantic
> LIBCXXABI_HAS_PEDANTIC_FLAG)
> +check_cxx_compiler_flag(-Werror LIBCXXABI_HAS_WERROR_FLAG)
> +check_cxx_compiler_flag(-Wno-error
> LIBCXXABI_HAS_WNO_ERROR_FLAG)
> +check_cxx_compiler_flag(-fno-rtti
> LIBCXXABI_HAS_FNO_RTTI_FLAG)
> +check_cxx_compiler_flag(/WX LIBCXXABI_HAS_WX_FLAG)
> +check_cxx_compiler_flag(/WX- LIBCXXABI_HAS_NO_WX_FLAG)
> +check_cxx_compiler_flag(/EHsc LIBCXXABI_HAS_EHSC_FLAG)
> +check_cxx_compiler_flag(/EHs- LIBCXXABI_HAS_NO_EHS_FLAG)
> +check_cxx_compiler_flag(/EHa- LIBCXXABI_HAS_NO_EHA_FLAG)
> +check_cxx_compiler_flag(/GR- LIBCXXABI_HAS_NO_GR_FLAG)
> +
> +# Check libraries
> +check_library_exists(c printf "" LIBCXXABI_HAS_C_LIB)
> diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
> new file mode 100644
> index 0000000..416f433
> --- /dev/null
> +++ b/src/CMakeLists.txt
> @@ -0,0 +1,74 @@
> +# Get sources
> +file(GLOB LIBCXXABI_SOURCES *.cpp)
> +
> +# Add all the headers to the project for IDEs.
> +if (MSVC_IDE OR XCODE)
> + file(GLOB_RECURSE LIBCXXABI_HEADERS ${CMAKE_CURRENT_SOURCE_DIR}/..
> /include/*)
> + # Force them all into the headers dir on MSVC, otherwise they end up at
> + # project scope because they don't have extensions.
> + if (MSVC_IDE)
> + source_group("Header Files" FILES ${LIBCXXABI_HEADERS})
> + endif()
> +endif()
> +
> +if (LIBCXXABI_ENABLE_SHARED)
> + add_library(cxxabi SHARED
> + ${LIBCXXABI_SOURCES}
> + ${LIBCXXABI_HEADERS}
> + )
> +else()
> + add_library(cxxabi STATIC
> + ${LIBCXXABI_SOURCES}
> + ${LIBCXXABI_HEADERS}
> + )
> +endif()
> +
> +if (LIBCXXABI_LIBCXX_PATH)
> + target_include_directories(cxxabi PRIVATE "${LIBCXXABI_LIBCXX_PATH}/
> include")
> +elseif (NOT LIBCXXABI_BUILT_STANDALONE)
> + target_include_directories(cxxabi PRIVATE
> + "${LLVM_MAIN_SRC_DIR}/
> projects/libcxx/include")
> +elseif (NOT APPLE)
> + message(FATAL_ERROR "LIBCXXABI_LIBCXX_PATH is not set.")
> +endif()
> +
> +# Generate library list.
> +set(libraries ${LIBCXXABI_CXX_ABI_LIBRARIES})
> +append_if(libraries LIBCXXABI_HAS_C_LIB c)
> +
> +target_link_libraries(cxxabi ${libraries})
> +
> +# Setup flags.
> +append_if(compile_flags LIBCXXABI_HAS_FPIC_FLAG -fPIC)
> +append_if(link_flags LIBCXXABI_HAS_NODEFAULTLIBS_FLAG -nodefaultlibs)
> +
> +if ( APPLE )
> + if ( CMAKE_OSX_DEPLOYMENT_TARGET STREQUAL "10.6" )
> + list(APPEND compile_flags "-U__STRICT_ANSI__")
> + list(APPEND link_flags
> + "-compatibility_version 1"
> + "-current_version ${LIBCXXABI_VERSION}"
> + "-install_name /usr/lib/libc++abi.1.dylib"
> + "/usr/lib/libSystem.B.dylib")
> + else()
> + list(APPEND link_flags
> + "-compatibility_version 1"
> + "-install_name /usr/lib/libc++abi.1.dylib")
> + endif()
> +endif()
> +
> +string(REPLACE ";" " " link_flags "${link_flags}")
> +
> +set_target_properties(cxxabi
> + PROPERTIES
> + COMPILE_FLAGS "${compile_flags}"
> + LINK_FLAGS "${link_flags}"
> + OUTPUT_NAME "c++abi"
> + VERSION "1.0"
> + SOVERSION "1"
> + )
> +
> +install(TARGETS cxxabi
> + LIBRARY DESTINATION lib
> + ARCHIVE DESTINATION lib
> + )
> diff --git a/www/index.html b/www/index.html
> index a174afd..4960b95 100644
> --- a/www/index.html
> +++ b/www/index.html
> @@ -79,6 +79,16 @@
> <li><code>svn co http://llvm.org/svn/llvm-project/libcxxabi/trunk
> libcxxabi</code></li>
> </ul>
>
> + <p>To build on Linux:</p>
> + <ul>
> + <li><code>cd libcxxabi</code></li>
> + <li><code>mkdir build && cd build</code></li>
> + <li><code>CC=clang CXX=clang++ cmake LIBCXXABI_LIBCXX_PATH=path/to/libcxx
> ..</code></li>
> + <li><code>make</code></li>
> + </ul>
> +
> + <p>You can also checkout libcxxabi to llvm/projects to build in tree.<p>
> +
> <p>Send discussions to the
> (<a href="http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev">clang
> mailing list</a>).</p>
>
> --
> 2.0.0.526.g5318336
>
>
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