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llvm-mirror/cmake/modules/CrossCompile.cmake
Chris Bieneman 401492ce04 Enabling LLVM & Clang to be cross-compiled using CMake from a single configuration command line
The basic idea is similar to the existing cross compilation support. A directory must be configured to build host versions of tablegen tools and llvm-config. This directory can be user provided (and configured), or it can be created during the build. During a build the native build directory will be configured and built to supply the tablegen tools used during the build. A user could also explicitly provide the tablegen executables to run on the CMake command line.

llvm-svn: 217105
2014-09-03 23:21:18 +00:00

34 lines
1.4 KiB
CMake

if(NOT DEFINED LLVM_NATIVE_BUILD)
set(LLVM_NATIVE_BUILD "${CMAKE_BINARY_DIR}/native")
message(STATUS "Setting native build dir to ${LLVM_NATIVE_BUILD}")
endif(NOT DEFINED LLVM_NATIVE_BUILD)
add_custom_command(OUTPUT ${LLVM_NATIVE_BUILD}
COMMAND ${CMAKE_COMMAND} -E make_directory ${LLVM_NATIVE_BUILD}
COMMENT "Creating ${LLVM_NATIVE_BUILD}...")
add_custom_command(OUTPUT ${LLVM_NATIVE_BUILD}/CMakeCache.txt
COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" ${CMAKE_SOURCE_DIR}
WORKING_DIRECTORY ${LLVM_NATIVE_BUILD}
DEPENDS ${LLVM_NATIVE_BUILD}
COMMENT "Configuring native LLVM...")
add_custom_target(ConfigureNativeLLVM DEPENDS ${LLVM_NATIVE_BUILD}/CMakeCache.txt)
set_directory_properties(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES ${LLVM_NATIVE_BUILD})
if(NOT IS_DIRECTORY ${LLVM_NATIVE_BUILD})
if(${CMAKE_HOST_SYSTEM_NAME} MATCHES "Darwin")
set(HOST_SYSROOT_FLAGS -DCMAKE_OSX_SYSROOT=macosx)
endif(${CMAKE_HOST_SYSTEM_NAME} MATCHES "Darwin")
message(STATUS "Configuring native build...")
execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory
${LLVM_NATIVE_BUILD} )
message(STATUS "Configuring native targets...")
execute_process(COMMAND ${CMAKE_COMMAND} -DCMAKE_BUILD_TYPE=Release
-G "${CMAKE_GENERATOR}" -DLLVM_TARGETS_TO_BUILD=${LLVM_TARGETS_TO_BUILD} ${HOST_SYSROOT_FLAGS} ${CMAKE_SOURCE_DIR}
WORKING_DIRECTORY ${LLVM_NATIVE_BUILD} )
endif(NOT IS_DIRECTORY ${LLVM_NATIVE_BUILD})