86 lines
3.3 KiB
CMake
86 lines
3.3 KiB
CMake
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set(LLVM_LINK_COMPONENTS support)
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set(BUILDVARIABLES_SRCPATH ${CMAKE_CURRENT_SOURCE_DIR}/BuildVariables.inc.in)
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set(BUILDVARIABLES_OBJPATH ${CMAKE_CURRENT_BINARY_DIR}/BuildVariables.inc)
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# Add the llvm-config tool.
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add_llvm_tool(llvm-config
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llvm-config.cpp
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)
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# Compute the substitution values for various items.
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get_property(SUPPORT_SYSTEM_LIBS TARGET LLVMSupport PROPERTY LLVM_SYSTEM_LIBS)
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get_property(WINDOWSMANIFEST_SYSTEM_LIBS TARGET LLVMWindowsManifest PROPERTY LLVM_SYSTEM_LIBS)
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foreach(l ${SUPPORT_SYSTEM_LIBS} ${WINDOWSMANIFEST_SYSTEM_LIBS})
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if(MSVC)
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set(SYSTEM_LIBS ${SYSTEM_LIBS} "${l}.lib")
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else()
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if (l MATCHES "^-")
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# If it's an option, pass it without changes.
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set(SYSTEM_LIBS ${SYSTEM_LIBS} "${l}")
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else()
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# Otherwise assume it's a library name we need to link with.
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if(IS_ABSOLUTE ${l})
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set(SYSTEM_LIBS ${SYSTEM_LIBS} "${l}")
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else()
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set(SYSTEM_LIBS ${SYSTEM_LIBS} "-l${l}")
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endif()
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endif()
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endif()
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endforeach()
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string(REPLACE ";" " " SYSTEM_LIBS "${SYSTEM_LIBS}")
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# Fetch target specific compile options, e.g. RTTI option
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get_property(COMPILE_FLAGS TARGET llvm-config PROPERTY COMPILE_FLAGS)
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# NOTE: We don't want to start extracting any random C/CXX flags that the
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# user may add that could affect the ABI. We only want to extract flags
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# that have been added by the LLVM build system.
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string(REGEX MATCH "-stdlib=[^ ]+" LLVM_CXX_STDLIB_FLAG ${CMAKE_CXX_FLAGS})
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string(REGEX MATCH "-std=[^ ]+" LLVM_C_STD_FLAG ${CMAKE_C_FLAGS})
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# Use configure_file to create BuildVariables.inc.
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set(LLVM_SRC_ROOT ${LLVM_MAIN_SRC_DIR})
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set(LLVM_OBJ_ROOT ${LLVM_BINARY_DIR})
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set(LLVM_CPPFLAGS "${LLVM_DEFINITIONS}")
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set(LLVM_CFLAGS "${LLVM_C_STD_FLAG} ${LLVM_DEFINITIONS}")
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# The language standard potentially affects the ABI/API of LLVM, so we want
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# to make sure it is reported by llvm-config.
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set(LLVM_CXXFLAGS "${CMAKE_CXX${CMAKE_CXX_STANDARD}_STANDARD_COMPILE_OPTION} ${LLVM_CXX_STDLIB_FLAG} ${COMPILE_FLAGS} ${LLVM_DEFINITIONS}")
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set(LLVM_BUILD_SYSTEM cmake)
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set(LLVM_HAS_RTTI ${LLVM_CONFIG_HAS_RTTI})
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set(LLVM_DYLIB_VERSION "${LLVM_VERSION_MAJOR}${LLVM_VERSION_SUFFIX}")
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# Use the C++ link flags, since they should be a superset of C link flags.
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set(LLVM_LDFLAGS "${CMAKE_CXX_LINK_FLAGS}")
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set(LLVM_BUILDMODE ${CMAKE_BUILD_TYPE})
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set(LLVM_SYSTEM_LIBS ${SYSTEM_LIBS})
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string(REPLACE ";" " " LLVM_TARGETS_BUILT "${LLVM_TARGETS_TO_BUILD}")
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llvm_canonicalize_cmake_booleans(
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LLVM_BUILD_LLVM_DYLIB
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LLVM_LINK_LLVM_DYLIB
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LLVM_HAS_RTTI
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BUILD_SHARED_LIBS)
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llvm_expand_pseudo_components(LLVM_DYLIB_COMPONENTS_expanded "${LLVM_DYLIB_COMPONENTS}")
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configure_file(${BUILDVARIABLES_SRCPATH} ${BUILDVARIABLES_OBJPATH} @ONLY)
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# Set build-time environment(s).
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add_definitions(-DCMAKE_CFG_INTDIR="${CMAKE_CFG_INTDIR}")
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if(LLVM_ENABLE_MODULES)
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target_compile_options(llvm-config PUBLIC
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"-fmodules-ignore-macro=CMAKE_CFG_INTDIR"
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)
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endif()
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# Add the dependency on the generation step.
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add_file_dependencies(${CMAKE_CURRENT_SOURCE_DIR}/llvm-config.cpp ${BUILDVARIABLES_OBJPATH})
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if(CMAKE_CROSSCOMPILING AND NOT LLVM_CONFIG_PATH)
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build_native_tool(llvm-config LLVM_CONFIG_PATH)
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set(LLVM_CONFIG_PATH "${LLVM_CONFIG_PATH}" CACHE STRING "")
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add_custom_target(NativeLLVMConfig DEPENDS ${LLVM_CONFIG_PATH})
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add_dependencies(llvm-config NativeLLVMConfig)
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endif()
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