diff options
Diffstat (limited to 'CMakeLists.txt')
| -rw-r--r-- | CMakeLists.txt | 105 |
1 files changed, 59 insertions, 46 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 483b673773a7..97835a1e945e 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -1,55 +1,68 @@ -# See docs/CMake.html for instructions about how to build Compiler-RT with CMake. +# CMake build for CompilerRT. +# +# This build assumes that CompilerRT is checked out into the +# 'projects/compiler-rt' inside of an LLVM tree, it is not a stand-alone build +# system. +# +# An important constraint of the build is that it only produces libraries +# based on the ability of the host toolchain to target various platforms. -PROJECT( CompilerRT C ) -CMAKE_MINIMUM_REQUIRED( VERSION 2.6 ) +include(LLVMParseArguments) -set(PACKAGE_NAME compiler-rt) -set(PACKAGE_VERSION 1.0svn) -set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}") -set(PACKAGE_BUGREPORT "llvmbugs@cs.uiuc.edu") +# The CompilerRT build system requires CMake version 2.8.8 or higher in order +# to use its support for building convenience "libraries" as a collection of +# .o files. This is particularly useful in producing larger, more complex +# runtime libraries. +cmake_minimum_required(VERSION 2.8.8) -SET( CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules ) +# FIXME: Below we assume that the target build of LLVM/Clang is x86, which is +# not at all valid. Much of this can be fixed just by switching to use +# a just-built-clang binary for the compiles. -# add definitions -include(DefineCompilerFlags) +# Detect whether the current target platform is 32-bit or 64-bit, and setup +# the correct commandline flags needed to attempt to target 32-bit and 64-bit. +if(CMAKE_SIZEOF_VOID_P EQUAL 4) + set(TARGET_X86_64_CFLAGS "-m64") + set(TARGET_I386_CFLAGS "") +else() + if(NOT CMAKE_SIZEOF_VOID_P EQUAL 8) + message(FATAL_ERROR "Please use a sane architecture with 4 or 8 byte pointers.") + endif() + set(TARGET_X86_64_CFLAGS "") + set(TARGET_I386_CFLAGS "-m32") +endif() -# Disallow in-source build -INCLUDE( MacroEnsureOutOfSourceBuild ) -MACRO_ENSURE_OUT_OF_SOURCE_BUILD( - "${PROJECT_NAME} requires an out of source build. Please create a separate build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there." - ) +# Try to compile a very simple source file to ensure we can target the given +# platform. We use the results of these tests to build only the various target +# runtime libraries supported by our current compilers cross-compiling +# abilities. +set(SIMPLE_SOURCE64 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple64.c) +file(WRITE ${SIMPLE_SOURCE64} "#include <stdlib.h>\nint main() {}") +try_compile(CAN_TARGET_X86_64 ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE64} + COMPILE_DEFINITIONS "${TARGET_X86_64_CFLAGS}" + CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_X86_64_CFLAGS}") -INCLUDE( ${CMAKE_SOURCE_DIR}/cmake/ConfigureChecks.cmake ) -CONFIGURE_FILE( ${CMAKE_SOURCE_DIR}/cmake/config.h.cmake - ${CMAKE_CURRENT_BINARY_DIR}/config.h ) +set(SIMPLE_SOURCE32 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple32.c) +file(WRITE ${SIMPLE_SOURCE32} "#include <stdlib.h>\nint main() {}") +try_compile(CAN_TARGET_I386 ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE32} + COMPILE_DEFINITIONS "${TARGET_I386_CFLAGS}" + CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_I386_CFLAGS}") -INCLUDE_DIRECTORIES( - ${CMAKE_CURRENT_BINARY_DIR} -) +# Because compiler-rt spends a lot of time setting up custom compile flags, +# define a handy helper function for it. The compile flags setting in CMake +# has serious issues that make its syntax challenging at best. +function(set_target_compile_flags target) + foreach(arg ${ARGN}) + set(argstring "${argstring} ${arg}") + endforeach() + set_property(TARGET ${target} PROPERTY COMPILE_FLAGS "${argstring}") +endfunction() -SET( Achitectures - i386 x86_64 ppc arm - ) +add_subdirectory(lib) -SET( Configurations - Debug Release Profile - ) - -# Only build Blocks Runtime if the compiler has enough support -IF( WIN32 OR MSVC OR HAVE_OSATOMIC_COMPARE_AND_SWAP_INT OR HAVE_SYNC_BOOL_COMPARE_AND_SWAP_INT ) - SET(BUILD_BLOCKS_RUNTIME TRUE) -ELSE( WIN32 OR MSVC OR HAVE_OSATOMIC_COMPARE_AND_SWAP_INT OR HAVE_SYNC_BOOL_COMPARE_AND_SWAP_INT ) - SET(BUILD_BLOCKS_RUNTIME FALSE) -ENDIF( WIN32 OR MSVC OR HAVE_OSATOMIC_COMPARE_AND_SWAP_INT OR HAVE_SYNC_BOOL_COMPARE_AND_SWAP_INT ) - -IF( BUILD_BLOCKS_RUNTIME ) - ADD_SUBDIRECTORY( BlocksRuntime ) -ELSE( BUILD_BLOCKS_RUNTIME ) - MESSAGE(STATUS "No suitable atomic operation routines detected, skipping Blocks Runtime") -ENDIF( BUILD_BLOCKS_RUNTIME ) - -ADD_SUBDIRECTORY( lib ) - -# Enable Test Suit: -INCLUDE( MacroAddCheckTest ) -ADD_SUBDIRECTORY( test ) +if(LLVM_INCLUDE_TESTS) + # Currently the tests have not been ported to CMake, so disable this + # directory. + # + #add_subdirectory(test) +endif() |