92 lines
3.4 KiB
CMake
92 lines
3.4 KiB
CMake
# SPDX-License-Identifier: Apache-2.0
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# Configures CMake for using GCC
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find_program(CMAKE_C_COMPILER gcc )
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find_program(CMAKE_OBJCOPY objcopy)
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find_program(CMAKE_OBJDUMP objdump)
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#find_program(CMAKE_LINKER ld ) # Not in use yet
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find_program(CMAKE_AR ar )
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find_program(CMAKE_RANLILB ranlib )
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find_program(CMAKE_READELF readelf)
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find_program(CMAKE_GDB gdb )
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# -march={pentium,lakemont,...} do not automagically imply -m32, so
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# adding it here.
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# There's only one 64bits ARCH (actually: -mx32). Let's exclude it to
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# avoid a confusing game of "who's last on the command line wins".
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# Maybe the -m32/-miamcu FLAGS should all be next to -march= in the
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# longer term?
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if(NOT CONFIG_X86_64)
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string(PREPEND CMAKE_ASM_FLAGS "-m32 ")
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string(PREPEND CMAKE_C_FLAGS "-m32 ")
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string(PREPEND CMAKE_CXX_FLAGS "-m32 ")
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string(PREPEND CMAKE_SHARED_LINKER_FLAGS "-m32 ") # unused?
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endif()
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if(CONFIG_CPLUSPLUS)
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set(cplusplus_compiler g++)
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else()
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if(EXISTS g++)
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set(cplusplus_compiler 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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find_program(CMAKE_CXX_COMPILER ${cplusplus_compiler} CACHE INTERNAL " " FORCE)
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# The x32 version of libgcc is usually not available (can't trust gcc
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# -mx32 --print-libgcc-file-name) so don't fail to build for something
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# that is currently not needed. See comments in compiler/gcc/target.cmake
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if (NOT CONFIG_X86_64)
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# Convert to list as cmake Modules/*.cmake do it
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STRING(REGEX REPLACE " +" ";" PRINT_LIBGCC_ARGS ${CMAKE_C_FLAGS})
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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} ${PRINT_LIBGCC_ARGS} --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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# While most x86_64 Linux distributions implement "multilib" and have
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# 32 bits libraries off the shelf, things like
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# "/usr/lib/gcc/x86_64-linux-gnu/7/IAMCU/libgcc.a" are unheard of.
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# So this fails CONFIG_X86_IAMCU=y with a "cannot find -lgcc" error which
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# is clearer than "undefined reference to __udivdi3, etc."
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LIST(APPEND TOOLCHAIN_LIBS gcc)
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endif()
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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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foreach(file_name include)
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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 ${_OUTPUT})
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endforeach()
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# Load toolchain_cc-family macros
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# Significant overlap with freestanding gcc compiler so reuse it
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include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_freestanding.cmake)
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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(${ZEPHYR_BASE}/cmake/compiler/gcc/target_optimizations.cmake)
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include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_cpp.cmake)
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include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_asm.cmake)
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include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_baremetal.cmake)
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include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_warnings.cmake)
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