blob: c97004829730cda85a05a6c91c5009ca99714103 [file] [log] [blame]
# SPDX-License-Identifier: Apache-2.0
set_ifndef(C++ g++)
# Configures CMake for using GCC, this script is re-used by several
# GCC-based toolchains
find_package(Deprecated COMPONENTS SPARSE)
find_program(CMAKE_C_COMPILER ${CROSS_COMPILE}${CC} PATHS ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
if(${CMAKE_C_COMPILER} STREQUAL CMAKE_C_COMPILER-NOTFOUND)
message(FATAL_ERROR "C compiler ${CROSS_COMPILE}${CC} not found - Please check your toolchain installation")
endif()
if(CONFIG_CPP)
set(cplusplus_compiler ${CROSS_COMPILE}${C++})
else()
if(EXISTS ${CROSS_COMPILE}${C++})
set(cplusplus_compiler ${CROSS_COMPILE}${C++})
else()
# When the toolchain doesn't support C++, and we aren't building
# with C++ support just set it to something so CMake doesn't
# crash, it won't actually be called
set(cplusplus_compiler ${CMAKE_C_COMPILER})
endif()
endif()
find_program(CMAKE_CXX_COMPILER ${cplusplus_compiler} PATHS ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
set(NOSTDINC "")
# Note that NOSYSDEF_CFLAG may be an empty string, and
# set_ifndef() does not work with empty string.
if(NOT DEFINED NOSYSDEF_CFLAG)
set(NOSYSDEF_CFLAG -undef)
endif()
foreach(file_name include/stddef.h include-fixed/limits.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 ${_OUTPUT})
endforeach()
include(${ZEPHYR_BASE}/cmake/gcc-m-cpu.cmake)
include(${ZEPHYR_BASE}/cmake/gcc-m-fpu.cmake)
if("${ARCH}" STREQUAL "arm")
include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_arm.cmake)
elseif("${ARCH}" STREQUAL "arm64")
include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_arm64.cmake)
elseif("${ARCH}" STREQUAL "arc")
include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_arc.cmake)
elseif("${ARCH}" STREQUAL "riscv")
include(${CMAKE_CURRENT_LIST_DIR}/target_riscv.cmake)
elseif("${ARCH}" STREQUAL "x86")
include(${CMAKE_CURRENT_LIST_DIR}/target_x86.cmake)
elseif("${ARCH}" STREQUAL "sparc")
include(${CMAKE_CURRENT_LIST_DIR}/target_sparc.cmake)
elseif("${ARCH}" STREQUAL "mips")
include(${CMAKE_CURRENT_LIST_DIR}/target_mips.cmake)
endif()
if(SYSROOT_DIR)
# The toolchain has specified a sysroot dir, pass it to the compiler
list(APPEND TOOLCHAIN_C_FLAGS
--sysroot=${SYSROOT_DIR}
)
# Use sysroot dir to set the libc path's
execute_process(
COMMAND ${CMAKE_C_COMPILER} ${TOOLCHAIN_C_FLAGS} --print-multi-directory
OUTPUT_VARIABLE NEWLIB_DIR
OUTPUT_STRIP_TRAILING_WHITESPACE
)
set(LIBC_LIBRARY_DIR "\"${SYSROOT_DIR}\"/lib/${NEWLIB_DIR}")
endif()
# This libgcc code is partially duplicated in compiler/*/target.cmake
execute_process(
COMMAND ${CMAKE_C_COMPILER} ${TOOLCHAIN_C_FLAGS} --print-libgcc-file-name
OUTPUT_VARIABLE LIBGCC_FILE_NAME
OUTPUT_STRIP_TRAILING_WHITESPACE
)
assert_exists(LIBGCC_FILE_NAME)
get_filename_component(LIBGCC_DIR ${LIBGCC_FILE_NAME} DIRECTORY)
assert_exists(LIBGCC_DIR)
LIST(APPEND LIB_INCLUDE_DIR "-L\"${LIBGCC_DIR}\"")
LIST(APPEND TOOLCHAIN_LIBS gcc)
# For CMake to be able to test if a compiler flag is supported by the
# toolchain we need to give CMake the necessary flags to compile and
# link a dummy C file.
#
# CMake checks compiler flags with check_c_compiler_flag() (Which we
# wrap with target_cc_option() in extensions.cmake)
foreach(isystem_include_dir ${NOSTDINC})
list(APPEND isystem_include_flags -isystem "\"${isystem_include_dir}\"")
endforeach()
# 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.
#
# Appending onto any existing values lets users specify
# toolchain-specific flags at generation time.
list(APPEND CMAKE_REQUIRED_FLAGS
-nostartfiles
-nostdlib
${isystem_include_flags}
-Wl,--unresolved-symbols=ignore-in-object-files
-Wl,--entry=0 # Set an entry point to avoid a warning
)
string(REPLACE ";" " " CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")