36bb00d1f5
Support for ARM Compiler C library. This commit add support for the ARM Compiler C libary in: - Kconfig - libc/armstdc A new Kconfig symbol is added to allow a toolchain to specify if they support linking with the minimal C library. Also the CMake variable `TOOLCHAIN_HAS_NEWLIB` is exported to Kconfig so that CONFIG_NEWLIB_LIBS can only be enabled if the toolchain has newlib. The armclang toolchain selects the CMake scatter file generator and disables support for the LD linker template which is not supported by armlink. For the ARM Compiler C library, a corresponding lib/libc/armstc/ folder with a minimal implementation to work with the ARM Compiler C library is added. Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
77 lines
2.5 KiB
CMake
77 lines
2.5 KiB
CMake
# find the compilers for C, CPP, assembly
|
|
find_program(CMAKE_C_COMPILER ${CROSS_COMPILE}armclang PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
|
|
find_program(CMAKE_CXX_COMPILER ${CROSS_COMPILE}armclang PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
|
|
find_program(CMAKE_ASM_COMPILER ${CROSS_COMPILE}armclang PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
|
|
|
|
# The CMAKE_REQUIRED_FLAGS variable is used by check_c_compiler_flag()
|
|
# (and other commands which end up calling check_c_source_compiles())
|
|
# to add additional compiler flags used during checking. These flags
|
|
# are unused during "real" builds of Zephyr source files linked into
|
|
# the final executable.
|
|
#
|
|
include(${ZEPHYR_BASE}/cmake/gcc-m-cpu.cmake)
|
|
set(CMAKE_SYSTEM_PROCESSOR ${GCC_M_CPU})
|
|
|
|
list(APPEND TOOLCHAIN_C_FLAGS
|
|
-fshort-enums
|
|
)
|
|
|
|
if(CONFIG_ARM64)
|
|
list(APPEND TOOLCHAIN_C_FLAGS -mcpu=${GCC_M_CPU})
|
|
|
|
list(APPEND TOOLCHAIN_C_FLAGS -mabi=lp64)
|
|
list(APPEND TOOLCHAIN_LD_FLAGS -mabi=lp64)
|
|
else()
|
|
list(APPEND TOOLCHAIN_C_FLAGS -mcpu=${GCC_M_CPU})
|
|
|
|
if(CONFIG_COMPILER_ISA_THUMB2)
|
|
list(APPEND TOOLCHAIN_C_FLAGS -mthumb)
|
|
endif()
|
|
|
|
list(APPEND TOOLCHAIN_C_FLAGS -mabi=aapcs)
|
|
|
|
# Defines a mapping from GCC_M_CPU to FPU
|
|
|
|
if(CONFIG_CPU_HAS_FPU_DOUBLE_PRECISION)
|
|
set(PRECISION_TOKEN)
|
|
else()
|
|
set(PRECISION_TOKEN sp-)
|
|
endif()
|
|
|
|
set(FPU_FOR_cortex-m4 fpv4-${PRECISION_TOKEN}d16)
|
|
set(FPU_FOR_cortex-m7 fpv5-${PRECISION_TOKEN}d16)
|
|
set(FPU_FOR_cortex-m33 fpv5-${PRECISION_TOKEN}d16)
|
|
|
|
if(CONFIG_FPU)
|
|
list(APPEND TOOLCHAIN_C_FLAGS -mfpu=${FPU_FOR_${GCC_M_CPU}})
|
|
if (CONFIG_FP_SOFTABI)
|
|
list(APPEND TOOLCHAIN_C_FLAGS -mfloat-abi=softfp)
|
|
elseif(CONFIG_FP_HARDABI)
|
|
list(APPEND TOOLCHAIN_C_FLAGS -mfloat-abi=hard)
|
|
endif()
|
|
endif()
|
|
endif()
|
|
|
|
foreach(file_name include/stddef.h)
|
|
execute_process(
|
|
COMMAND ${CMAKE_C_COMPILER} --print-file-name=${file_name}
|
|
OUTPUT_VARIABLE _OUTPUT
|
|
)
|
|
get_filename_component(_OUTPUT "${_OUTPUT}" DIRECTORY)
|
|
string(REGEX REPLACE "\n" "" _OUTPUT ${_OUTPUT})
|
|
|
|
list(APPEND NOSTDINC ${_OUTPUT})
|
|
endforeach()
|
|
|
|
foreach(isystem_include_dir ${NOSTDINC})
|
|
list(APPEND isystem_include_flags -isystem ${isystem_include_dir})
|
|
endforeach()
|
|
|
|
set(CMAKE_REQUIRED_FLAGS ${isystem_include_flags})
|
|
string(REPLACE ";" " " CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
|
|
|
|
if(CONFIG_ARMCLANG_STD_LIBC)
|
|
# Zephyr requires AEABI portability to ensure correct functioning of the C
|
|
# library, for example error numbers, errno.h.
|
|
list(APPEND TOOLCHAIN_C_FLAGS -D_AEABI_PORTABILITY_LEVEL=1)
|
|
endif()
|