blob: b325028e2b38f265fa3cdb129faef2b8d24240cd [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_program(CMAKE_C_COMPILER ${CROSS_COMPILE}${CC} PATHS ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
if(CONFIG_CPLUSPLUS)
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()
list(APPEND TOOLCHAIN_LIBS
gcc
hal
)
# 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 extentions.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 ${isystem_include_flags} -Wl,--unresolved-symbols=ignore-in-object-files)
string(REPLACE ";" " " CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")