0b3c65feea
Introduce toolchain_cc_optimize_for_* family of macros. Each macro represents a general optimization class. Each macro is then responsible for setting an output variable to that class-of-optimization's flag. The names of these output variables are decided from the root CMakeLists.txt. No functional change expected. Clang's optimization flags are compatible with gcc, and are thus inherited. This is motivated by the wish to abstract Zephyr's usage of toolchains, permitting easier porting to other (commercial) toolchains. Signed-off-by: Mark Ruvald Pedersen <mped@oticon.com>
59 lines
2.3 KiB
CMake
59 lines
2.3 KiB
CMake
# Configuration for host installed llvm
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#
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set(NOSTDINC "")
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# Note that NOSYSDEF_CFLAG may be an empty string, and
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# set_ifndef() does not work with empty string.
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if(NOT DEFINED NOSYSDEF_CFLAG)
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set(NOSYSDEF_CFLAG -undef)
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endif()
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find_program(CMAKE_C_COMPILER clang PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
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find_program(CMAKE_CXX_COMPILER clang++ PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
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find_program(CMAKE_AR llvm-ar PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
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find_program(CMAKE_LINKER llvm-link PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
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find_program(CMAKE_NM llvm-nm PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
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find_program(CMAKE_OBJDUMP llvm-objdump PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
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find_program(CMAKE_RANLIB llvm-ranlib PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
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find_program(CMAKE_OBJCOPY objcopy PATH ${TOOLCHAIN_HOME})
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find_program(CMAKE_READELF readelf PATH ${TOOLCHAIN_HOME})
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foreach(file_name include include-fixed)
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execute_process(
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COMMAND ${CMAKE_C_COMPILER} --print-file-name=${file_name}
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OUTPUT_VARIABLE _OUTPUT
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)
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string(REGEX REPLACE "\n" "" _OUTPUT ${_OUTPUT})
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list(APPEND NOSTDINC ${_OUTPUT})
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endforeach()
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foreach(isystem_include_dir ${NOSTDINC})
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list(APPEND isystem_include_flags -isystem ${isystem_include_dir})
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endforeach()
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# This libgcc code is partially duplicated in compiler/*/target.cmake
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execute_process(
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COMMAND ${CMAKE_C_COMPILER} ${TOOLCHAIN_C_FLAGS} --print-libgcc-file-name
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OUTPUT_VARIABLE LIBGCC_FILE_NAME
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OUTPUT_STRIP_TRAILING_WHITESPACE
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)
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assert_exists(LIBGCC_FILE_NAME)
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get_filename_component(LIBGCC_DIR ${LIBGCC_FILE_NAME} DIRECTORY)
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assert_exists(LIBGCC_DIR)
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list(APPEND LIB_INCLUDE_DIR "-L\"${LIBGCC_DIR}\"")
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list(APPEND TOOLCHAIN_LIBS gcc)
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set(CMAKE_REQUIRED_FLAGS -nostartfiles -nostdlib ${isystem_include_flags} -Wl,--unresolved-symbols=ignore-in-object-files)
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string(REPLACE ";" " " CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
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# Load toolchain_cc-family macros
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# Clang and GCC are almost feature+flag compatible, so reuse freestanding gcc
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include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_security_fortify.cmake)
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include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_security_canaries.cmake)
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include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_optimizations.cmake)
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