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When dealing with system libraries which are absolute paths, use the absolute path rather than the `-l` option. This ensures that the system library can be properly linked against. This is needed to enable using proper link dependencies in CMake.
88 lines
3.3 KiB
CMake
88 lines
3.3 KiB
CMake
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}${LLVM_VERSION_SUFFIX}")
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set(LLVM_HAS_GLOBAL_ISEL "ON")
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# Use the C++ link flags, since they should be a superset of C link flags.
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set(LLVM_LDFLAGS "${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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LLVM_HAS_GLOBAL_ISEL
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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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