109 lines
3.5 KiB
CMake
109 lines
3.5 KiB
CMake
# Configures CMake for using GCC, this script is re-used by several
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# GCC-based toolchains
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set(CMAKE_C_COMPILER ${CROSS_COMPILE}gcc CACHE INTERNAL " " FORCE)
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set(CMAKE_OBJCOPY ${CROSS_COMPILE}objcopy CACHE INTERNAL " " FORCE)
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set(CMAKE_OBJDUMP ${CROSS_COMPILE}objdump CACHE INTERNAL " " FORCE)
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#set(CMAKE_LINKER ${CROSS_COMPILE}ld CACHE INTERNAL " " FORCE) # Not in use yet
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set(CMAKE_AR ${CROSS_COMPILE}ar CACHE INTERNAL " " FORCE)
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set(CMAKE_RANLILB ${CROSS_COMPILE}ranlib CACHE INTERNAL " " FORCE)
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set(CMAKE_READELF ${CROSS_COMPILE}readelf CACHE INTERNAL " " FORCE)
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set(CMAKE_GDB ${CROSS_COMPILE}gdb CACHE INTERNAL " " FORCE)
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assert_exists(CMAKE_READELF)
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if(CONFIG_CPLUSPLUS)
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set(cplusplus_compiler ${CROSS_COMPILE}g++)
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else()
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if(EXISTS ${CROSS_COMPILE}g++)
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set(cplusplus_compiler ${CROSS_COMPILE}g++)
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else()
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# When the toolchain doesn't support C++, and we aren't building
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# with C++ support just set it to something so CMake doesn't
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# crash, it won't actually be called
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set(cplusplus_compiler ${CMAKE_C_COMPILER})
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endif()
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endif()
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set(CMAKE_CXX_COMPILER ${cplusplus_compiler} CACHE INTERNAL " " FORCE)
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set(NOSTDINC "")
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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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if(MSYS)
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# TODO: Remove this when
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# https://github.com/zephyrproject-rtos/zephyr/issues/4687 is
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# resolved
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execute_process(
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COMMAND cygpath -u ${_OUTPUT}
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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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endif()
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list(APPEND NOSTDINC ${_OUTPUT})
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endforeach()
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include($ENV{ZEPHYR_BASE}/cmake/gcc-m-cpu.cmake)
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if("${ARCH}" STREQUAL "arm")
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list(APPEND TOOLCHAIN_C_FLAGS
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-mthumb
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-mcpu=${GCC_M_CPU}
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)
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include($ENV{ZEPHYR_BASE}/cmake/fpu-for-gcc-m-cpu.cmake)
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if(CONFIG_FLOAT)
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list(APPEND TOOLCHAIN_C_FLAGS -mfpu=${FPU_FOR_${GCC_M_CPU}})
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if (CONFIG_FP_SOFTABI)
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list(APPEND TOOLCHAIN_C_FLAGS -mfloat-abi=soft)
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elseif(CONFIG_FP_HARDABI)
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list(APPEND TOOLCHAIN_C_FLAGS -mfloat-abi=hard)
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endif()
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endif()
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elseif("${ARCH}" STREQUAL "arc")
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list(APPEND TOOLCHAIN_C_FLAGS
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-mcpu=${GCC_M_CPU}
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)
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endif()
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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_DIR
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OUTPUT_STRIP_TRAILING_WHITESPACE
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)
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execute_process(
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COMMAND ${CMAKE_C_COMPILER} ${TOOLCHAIN_C_FLAGS} --print-multi-directory
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OUTPUT_VARIABLE NEWLIB_DIR
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OUTPUT_STRIP_TRAILING_WHITESPACE
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)
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get_filename_component(LIBGCC_DIR ${LIBGCC_DIR} DIRECTORY)
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assert(LIBGCC_DIR "LIBGCC_DIR not found")
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LIST(APPEND LIB_INCLUDE_DIR -L${LIBGCC_DIR})
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LIST(APPEND TOOLCHAIN_LIBS gcc)
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set(LIBC_INCLUDE_DIR ${SYSROOT_DIR}/include)
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set(LIBC_LIBRARY_DIR ${SYSROOT_DIR}/lib/${NEWLIB_DIR})
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# For CMake to be able to test if a compiler flag is supported by the
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# toolchain we need to give CMake the necessary flags to compile and
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# link a dummy C file.
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#
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# CMake checks compiler flags with check_c_compiler_flag() (Which we
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# wrap with target_cc_option() in extentions.cmake)
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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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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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