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# See docs/CMake.html for instructions about how to build LLVM with CMake.
cmake_minimum_required(VERSION 3.4.3)
# CMake 3.1 and higher include generator expressions of the form
# $<TARGETLIB:obj> in the SOURCES property. These need to be
# stripped everywhere that access the SOURCES property, so we just
# defer to the OLD behavior of not including generator expressions
# in the output for now.
cmake_policy(SET CMP0051 OLD)
cmake_policy(SET CMP0056 NEW)
cmake_policy(SET CMP0057 NEW)
endif()
if(NOT DEFINED LLVM_VERSION_PATCH)
set(LLVM_VERSION_PATCH 0)
endif()
if(NOT DEFINED LLVM_VERSION_SUFFIX)
set(LLVM_VERSION_SUFFIX svn)
endif()
if (NOT PACKAGE_VERSION)
set(PACKAGE_VERSION
"${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}${LLVM_VERSION_SUFFIX}")
endif()
if ((CMAKE_GENERATOR MATCHES "Visual Studio") AND (CMAKE_GENERATOR_TOOLSET STREQUAL ""))
message(WARNING "Visual Studio generators use the x86 host compiler by "
"default, even for 64-bit targets. This can result in linker "
"instability and out of memory errors. To use the 64-bit "
"host compiler, pass -Thost=x64 on the CMake command line.")
endif()
VERSION ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}
LANGUAGES C CXX ASM)
if (NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
message(STATUS "No build type selected, default to Debug")
set(CMAKE_BUILD_TYPE "Debug" CACHE STRING "Build type (default Debug)" FORCE)
# This should only apply if you are both on an Apple host, and targeting Apple.
if(CMAKE_HOST_APPLE AND APPLE)
# if CMAKE_LIBTOOL is not set, try and find it with xcrun or find_program
if(NOT CMAKE_LIBTOOL)
if(NOT CMAKE_XCRUN)
find_program(CMAKE_XCRUN NAMES xcrun)
endif()
if(CMAKE_XCRUN)
execute_process(COMMAND ${CMAKE_XCRUN} -find libtool
OUTPUT_VARIABLE CMAKE_LIBTOOL
OUTPUT_STRIP_TRAILING_WHITESPACE)
endif()
if(NOT CMAKE_LIBTOOL OR NOT EXISTS CMAKE_LIBTOOL)
find_program(CMAKE_LIBTOOL NAMES libtool)
endif()
get_property(languages GLOBAL PROPERTY ENABLED_LANGUAGES)
if(CMAKE_LIBTOOL)
set(CMAKE_LIBTOOL ${CMAKE_LIBTOOL} CACHE PATH "libtool executable")
message(STATUS "Found libtool - ${CMAKE_LIBTOOL}")
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execute_process(COMMAND ${CMAKE_LIBTOOL} -V
OUTPUT_VARIABLE LIBTOOL_V_OUTPUT
OUTPUT_STRIP_TRAILING_WHITESPACE)
if("${LIBTOOL_V_OUTPUT}" MATCHES ".*cctools-([0-9.]+).*")
string(REGEX REPLACE ".*cctools-([0-9.]+).*" "\\1" LIBTOOL_VERSION
${LIBTOOL_V_OUTPUT})
if(NOT LIBTOOL_VERSION VERSION_LESS "862")
set(LIBTOOL_NO_WARNING_FLAG "-no_warning_for_no_symbols")
endif()
endif()
foreach(lang ${languages})
set(CMAKE_${lang}_CREATE_STATIC_LIBRARY
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"${CMAKE_LIBTOOL} -static ${LIBTOOL_NO_WARNING_FLAG} -o <TARGET> \
<LINK_FLAGS> <OBJECTS> ")
endforeach()
endif()
# If DYLD_LIBRARY_PATH is set we need to set it on archiver commands
if(DYLD_LIBRARY_PATH)
set(dyld_envar "DYLD_LIBRARY_PATH=${DYLD_LIBRARY_PATH}")
foreach(lang ${languages})
foreach(cmd ${CMAKE_${lang}_CREATE_STATIC_LIBRARY})
list(APPEND CMAKE_${lang}_CREATE_STATIC_LIBRARY_NEW
"${dyld_envar} ${cmd}")
endforeach()
set(CMAKE_${lang}_CREATE_STATIC_LIBRARY
${CMAKE_${lang}_CREATE_STATIC_LIBRARY_NEW})
endforeach()
endif()
# Side-by-side subprojects layout: automatically set the
# LLVM_EXTERNAL_${project}_SOURCE_DIR using LLVM_ALL_PROJECTS
# This allows an easy way of setting up a build directory for llvm and another
# one for llvm+clang+... using the same sources.
set(LLVM_ALL_PROJECTS "clang;libcxx;libcxxabi;lldb;compiler-rt;lld;polly")
set(LLVM_ENABLE_PROJECTS "" CACHE STRING
"Semicolon-separated list of projects to build (${LLVM_ALL_PROJECTS}), or \"all\".")
if( LLVM_ENABLE_PROJECTS STREQUAL "all" )
set( LLVM_ENABLE_PROJECTS ${LLVM_ALL_PROJECTS})
endif()
foreach(proj ${LLVM_ENABLE_PROJECTS})
set(PROJ_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../${proj}")
if(NOT EXISTS "${PROJ_DIR}" OR NOT IS_DIRECTORY "${PROJ_DIR}")
message(FATAL_ERROR "LLVM_ENABLE_PROJECTS requests ${proj} but directory not found: ${PROJ_DIR}")
endif()
string(TOUPPER "${proj}" upper_proj)
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STRING(REGEX REPLACE "-" "_" upper_proj ${upper_proj})
set(LLVM_EXTERNAL_${upper_proj}_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../${proj}")
# There is a widely spread opinion that clang-tools-extra should be merged
# into clang. The following simulates it by always enabling clang-tools-extra
# when enabling clang.
if (proj STREQUAL "clang")
set(LLVM_EXTERNAL_CLANG_TOOLS_EXTRA_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../clang-tools-extra")
endif()
endforeach()
# Build llvm with ccache if the package is present
set(LLVM_CCACHE_BUILD OFF CACHE BOOL "Set to ON for a ccache enabled build")
if(LLVM_CCACHE_BUILD)
find_program(CCACHE_PROGRAM ccache)
if(CCACHE_PROGRAM)
set(LLVM_CCACHE_SIZE "" CACHE STRING "Size of ccache")
set(LLVM_CCACHE_DIR "" CACHE STRING "Directory to keep ccached data")
set(CCACHE_PROGRAM "CCACHE_CPP2=yes CCACHE_HASHDIR=yes ${CCACHE_PROGRAM}")
if (LLVM_CCACHE_SIZE)
set(CCACHE_PROGRAM "CCACHE_SIZE=${LLVM_CCACHE_SIZE} ${CCACHE_PROGRAM}")
endif()
if (LLVM_CCACHE_DIR)
set(CCACHE_PROGRAM "CCACHE_DIR=${LLVM_CCACHE_DIR} ${CCACHE_PROGRAM}")
endif()
set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ${CCACHE_PROGRAM})
else()
message(FATAL_ERROR "Unable to find the program ccache. Set LLVM_CCACHE_BUILD to OFF")
endif()
endif()
option(LLVM_DEPENDENCY_DEBUGGING "Dependency debugging mode to verify correctly expressed library dependencies (Darwin only)" OFF)
# Some features of the LLVM build may be disallowed when dependency debugging is
# enabled. In particular you cannot use ccache because we want to force compile
# operations to always happen.
if(LLVM_DEPENDENCY_DEBUGGING)
if(NOT CMAKE_HOST_APPLE)
message(FATAL_ERROR "Dependency debugging is only currently supported on Darwin hosts.")
endif()
if(LLVM_CCACHE_BUILD)
message(FATAL_ERROR "Cannot enable dependency debugging while using ccache.")
endif()
endif()
option(LLVM_ENABLE_DAGISEL_COV "Debug: Prints tablegen patterns that were used for selecting" OFF)
# Add path for custom modules
set(CMAKE_MODULE_PATH
${CMAKE_MODULE_PATH}
"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
"${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules"
)
# Generate a CompilationDatabase (compile_commands.json file) for our build,
# for use by clang_complete, YouCompleteMe, etc.
set(CMAKE_EXPORT_COMPILE_COMMANDS 1)
option(LLVM_INSTALL_BINUTILS_SYMLINKS
"Install symlinks from the binutils tool names to the corresponding LLVM tools." OFF)
option(LLVM_INSTALL_UTILS "Include utility binaries in the 'install' target." OFF)
option(LLVM_INSTALL_TOOLCHAIN_ONLY "Only include toolchain files in the 'install' target." OFF)
option(LLVM_USE_FOLDERS "Enable solution folders in Visual Studio. Disable for Express versions." ON)
if ( LLVM_USE_FOLDERS )
set_property(GLOBAL PROPERTY USE_FOLDERS ON)
endif()
include(VersionFromVCS)
option(LLVM_APPEND_VC_REV
"Embed the version control system revision id in LLVM" ON)
set(PACKAGE_NAME LLVM)
set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
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