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401492ce04
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
123 lines
4.7 KiB
CMake
123 lines
4.7 KiB
CMake
# LLVM_TARGET_DEFINITIONS must contain the name of the .td file to process.
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# Extra parameters for `tblgen' may come after `ofn' parameter.
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# Adds the name of the generated file to TABLEGEN_OUTPUT.
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function(tablegen project ofn)
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# Validate calling context.
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foreach(v
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${project}_TABLEGEN_EXE
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LLVM_MAIN_SRC_DIR
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LLVM_MAIN_INCLUDE_DIR
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)
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if(NOT ${v})
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message(FATAL_ERROR "${v} not set")
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endif()
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endforeach()
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file(GLOB local_tds "*.td")
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file(GLOB_RECURSE global_tds "${LLVM_MAIN_INCLUDE_DIR}/llvm/*.td")
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if (IS_ABSOLUTE ${LLVM_TARGET_DEFINITIONS})
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set(LLVM_TARGET_DEFINITIONS_ABSOLUTE ${LLVM_TARGET_DEFINITIONS})
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else()
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set(LLVM_TARGET_DEFINITIONS_ABSOLUTE
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${CMAKE_CURRENT_SOURCE_DIR}/${LLVM_TARGET_DEFINITIONS})
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endif()
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add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
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# Generate tablegen output in a temporary file.
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COMMAND ${${project}_TABLEGEN_EXE} ${ARGN} -I ${CMAKE_CURRENT_SOURCE_DIR}
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-I ${LLVM_MAIN_SRC_DIR}/lib/Target -I ${LLVM_MAIN_INCLUDE_DIR}
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${LLVM_TARGET_DEFINITIONS_ABSOLUTE}
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-o ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
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# The file in LLVM_TARGET_DEFINITIONS may be not in the current
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# directory and local_tds may not contain it, so we must
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# explicitly list it here:
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DEPENDS ${${project}_TABLEGEN_EXE} ${local_tds} ${global_tds}
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${LLVM_TARGET_DEFINITIONS_ABSOLUTE}
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COMMENT "Building ${ofn}..."
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)
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add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
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# Only update the real output file if there are any differences.
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# This prevents recompilation of all the files depending on it if there
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# aren't any.
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COMMAND ${CMAKE_COMMAND} -E copy_if_different
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${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
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${CMAKE_CURRENT_BINARY_DIR}/${ofn}
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DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
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COMMENT "Updating ${ofn}..."
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)
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# `make clean' must remove all those generated files:
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set_property(DIRECTORY APPEND
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PROPERTY ADDITIONAL_MAKE_CLEAN_FILES ${ofn}.tmp ${ofn})
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set(TABLEGEN_OUTPUT ${TABLEGEN_OUTPUT} ${CMAKE_CURRENT_BINARY_DIR}/${ofn} PARENT_SCOPE)
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set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${ofn} PROPERTIES
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GENERATED 1)
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endfunction()
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# Creates a target for publicly exporting tablegen dependencies.
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function(add_public_tablegen_target target)
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if(NOT TABLEGEN_OUTPUT)
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message(FATAL_ERROR "Requires tablegen() definitions as TABLEGEN_OUTPUT.")
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endif()
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add_custom_target(${target}
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DEPENDS ${TABLEGEN_OUTPUT})
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if(LLVM_COMMON_DEPENDS)
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add_dependencies(${target} ${LLVM_COMMON_DEPENDS})
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endif()
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set_target_properties(${target} PROPERTIES FOLDER "Tablegenning")
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set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} ${target} PARENT_SCOPE)
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endfunction()
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macro(add_tablegen target project)
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set(${target}_OLD_LLVM_LINK_COMPONENTS ${LLVM_LINK_COMPONENTS})
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set(LLVM_LINK_COMPONENTS ${LLVM_LINK_COMPONENTS} TableGen)
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add_llvm_utility(${target} ${ARGN})
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set(LLVM_LINK_COMPONENTS ${${target}_OLD_LLVM_LINK_COMPONENTS})
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set(${project}_TABLEGEN "${target}" CACHE
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STRING "Native TableGen executable. Saves building one when cross-compiling.")
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# Upgrade existing LLVM_TABLEGEN setting.
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if(${project} STREQUAL LLVM)
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if(${LLVM_TABLEGEN} STREQUAL tblgen)
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set(LLVM_TABLEGEN "${target}" CACHE
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STRING "Native TableGen executable. Saves building one when cross-compiling."
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FORCE)
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endif()
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endif()
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# Effective tblgen executable to be used:
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set(${project}_TABLEGEN_EXE ${${project}_TABLEGEN} PARENT_SCOPE)
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if(CMAKE_CROSSCOMPILING)
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if( ${${project}_TABLEGEN} STREQUAL "${target}" )
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set(${project}_TABLEGEN_EXE "${LLVM_NATIVE_BUILD}/bin/${target}")
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set(${project}_TABLEGEN_EXE ${${project}_TABLEGEN_EXE} PARENT_SCOPE)
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add_custom_command(OUTPUT ${${project}_TABLEGEN_EXE}
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COMMAND ${CMAKE_COMMAND} --build . --target ${target} --config $<CONFIGURATION>
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DEPENDS ${LLVM_NATIVE_BUILD}/CMakeCache.txt
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WORKING_DIRECTORY ${LLVM_NATIVE_BUILD}
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COMMENT "Building native TableGen...")
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add_custom_target(${project}NativeTableGen DEPENDS ${${project}_TABLEGEN_EXE})
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add_dependencies(${project}NativeTableGen ConfigureNativeLLVM)
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add_dependencies(${target} ${project}NativeTableGen)
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endif()
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endif()
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if( MINGW )
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if(CMAKE_SIZEOF_VOID_P MATCHES "8")
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set_target_properties(${target} PROPERTIES LINK_FLAGS -Wl,--stack,16777216)
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endif(CMAKE_SIZEOF_VOID_P MATCHES "8")
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endif( MINGW )
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if (${project} STREQUAL LLVM AND NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
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install(TARGETS ${target}
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EXPORT LLVMExports
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RUNTIME DESTINATION bin)
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endif()
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set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS ${target})
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endmacro()
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