CrossCompile.cmake
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include(AddLLVM)
include(LLVMExternalProjectUtils)
function(llvm_create_cross_target project_name target_name toolchain buildtype)
if(NOT DEFINED ${project_name}_${target_name}_BUILD)
set(${project_name}_${target_name}_BUILD
"${CMAKE_CURRENT_BINARY_DIR}/${target_name}")
set(${project_name}_${target_name}_BUILD
${${project_name}_${target_name}_BUILD} PARENT_SCOPE)
message(STATUS "Setting native build dir to " ${${project_name}_${target_name}_BUILD})
endif(NOT DEFINED ${project_name}_${target_name}_BUILD)
if (EXISTS ${LLVM_MAIN_SRC_DIR}/cmake/platforms/${toolchain}.cmake)
set(CROSS_TOOLCHAIN_FLAGS_INIT
-DCMAKE_TOOLCHAIN_FILE=\"${LLVM_MAIN_SRC_DIR}/cmake/platforms/${toolchain}.cmake\")
else()
set(CROSS_TOOLCHAIN_FLAGS_INIT
-DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
)
endif()
set(CROSS_TOOLCHAIN_FLAGS_${target_name} ${CROSS_TOOLCHAIN_FLAGS_INIT}
CACHE STRING "Toolchain configuration for ${target_name}")
# project specific version of the flags up above
set(CROSS_TOOLCHAIN_FLAGS_${project_name}_${target_name} ""
CACHE STRING "Toolchain configuration for ${Pproject_name}_${target_name}")
if (buildtype)
set(build_type_flags "-DCMAKE_BUILD_TYPE=${buildtype}")
endif()
if (LLVM_USE_LINKER AND NOT CMAKE_CROSSCOMPILING)
set(linker_flag "-DLLVM_USE_LINKER=${LLVM_USE_LINKER}")
endif()
if (LLVM_EXTERNAL_CLANG_SOURCE_DIR)
# Propagate LLVM_EXTERNAL_CLANG_SOURCE_DIR so that clang-tblgen can be built
set(external_clang_dir "-DLLVM_EXTERNAL_CLANG_SOURCE_DIR=${LLVM_EXTERNAL_CLANG_SOURCE_DIR}")
endif()
add_custom_command(OUTPUT ${${project_name}_${target_name}_BUILD}
COMMAND ${CMAKE_COMMAND} -E make_directory ${${project_name}_${target_name}_BUILD}
COMMENT "Creating ${${project_name}_${target_name}_BUILD}...")
add_custom_target(CREATE_${project_name}_${target_name}
DEPENDS ${${project_name}_${target_name}_BUILD})
# Escape semicolons in the targets list so that cmake doesn't expand
# them to spaces.
string(REPLACE ";" "$<SEMICOLON>" targets_to_build_arg
"${LLVM_TARGETS_TO_BUILD}")
string(REPLACE ";" "$<SEMICOLON>" experimental_targets_to_build_arg
"${LLVM_EXPERIMENTAL_TARGETS_TO_BUILD}")
string(REPLACE ";" "$<SEMICOLON>" llvm_enable_projects_arg
"${LLVM_ENABLE_PROJECTS}")
string(REPLACE ";" "$<SEMICOLON>" llvm_external_projects_arg
"${LLVM_EXTERNAL_PROJECTS}")
set(external_project_source_dirs)
foreach(project ${LLVM_EXTERNAL_PROJECTS})
canonicalize_tool_name(${project} name)
list(APPEND external_project_source_dirs
"-DLLVM_EXTERNAL_${name}_SOURCE_DIR=${LLVM_EXTERNAL_${name}_SOURCE_DIR}")
endforeach()
add_custom_command(OUTPUT ${${project_name}_${target_name}_BUILD}/CMakeCache.txt
COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}"
-DCMAKE_MAKE_PROGRAM="${CMAKE_MAKE_PROGRAM}"
${CROSS_TOOLCHAIN_FLAGS_${target_name}} ${CMAKE_CURRENT_SOURCE_DIR}
${CROSS_TOOLCHAIN_FLAGS_${project_name}_${target_name}}
-DLLVM_TARGET_IS_CROSSCOMPILE_HOST=TRUE
-DLLVM_TARGETS_TO_BUILD="${targets_to_build_arg}"
-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="${experimental_targets_to_build_arg}"
-DLLVM_DEFAULT_TARGET_TRIPLE="${TARGET_TRIPLE}"
-DLLVM_TARGET_ARCH="${LLVM_TARGET_ARCH}"
-DLLVM_ENABLE_PROJECTS="${llvm_enable_projects_arg}"
-DLLVM_EXTERNAL_PROJECTS="${llvm_external_projects_arg}"
${external_project_source_dirs}
-DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN="${LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN}"
${build_type_flags} ${linker_flag} ${external_clang_dir}
${ARGN}
WORKING_DIRECTORY ${${project_name}_${target_name}_BUILD}
DEPENDS CREATE_${project_name}_${target_name}
COMMENT "Configuring ${target_name} ${project_name}...")
add_custom_target(CONFIGURE_${project_name}_${target_name}
DEPENDS ${${project_name}_${target_name}_BUILD}/CMakeCache.txt)
endfunction()
# Sets up a native build for a tool, used e.g. for cross-compilation and
# LLVM_OPTIMIZED_TABLEGEN. Always builds in Release.
# - target: The target to build natively
# - output_path_var: A variable name which receives the path to the built target
# - DEPENDS: Any additional dependencies for the target
function(build_native_tool target output_path_var)
cmake_parse_arguments(ARG "" "" "DEPENDS" ${ARGN})
if(CMAKE_CONFIGURATION_TYPES)
set(output_path "${${PROJECT_NAME}_NATIVE_BUILD}/Release/bin/${target}")
else()
set(output_path "${${PROJECT_NAME}_NATIVE_BUILD}/bin/${target}")
endif()
llvm_ExternalProject_BuildCmd(build_cmd ${target} ${${PROJECT_NAME}_NATIVE_BUILD}
CONFIGURATION Release)
add_custom_command(OUTPUT "${output_path}"
COMMAND ${build_cmd}
DEPENDS CONFIGURE_${PROJECT_NAME}_NATIVE ${ARG_DEPENDS}
WORKING_DIRECTORY "${${PROJECT_NAME}_NATIVE_BUILD}"
COMMENT "Building native ${target}..."
USES_TERMINAL)
set(${output_path_var} "${output_path}" PARENT_SCOPE)
endfunction()