esp-idf/tools/cmake/toolchain-esp32s2.cmake

include($ENV{IDF_PATH}/tools/cmake/utilities.cmake)

set(CMAKE_SYSTEM_NAME Generic)

set(CMAKE_C_COMPILER xtensa-esp32s2-elf-gcc)
set(CMAKE_CXX_COMPILER xtensa-esp32s2-elf-g++)
set(CMAKE_ASM_COMPILER xtensa-esp32s2-elf-gcc)
set(_CMAKE_TOOLCHAIN_PREFIX xtensa-esp32s2-elf-)

set(_CMAKE_TOOLCHAIN_COMMON_FLAGS "-mlongcalls -fno-builtin-memcpy -fno-builtin-memset -fno-builtin-bzero")

remove_duplicated_flags("${_CMAKE_TOOLCHAIN_COMMON_FLAGS} ${CMAKE_C_FLAGS}" UNIQ_CMAKE_C_FLAGS)
set(CMAKE_C_FLAGS "${UNIQ_CMAKE_C_FLAGS}" CACHE STRING "C Compiler Base Flags" FORCE)

remove_duplicated_flags("${_CMAKE_TOOLCHAIN_COMMON_FLAGS} ${CMAKE_CXX_FLAGS}" UNIQ_CMAKE_CXX_FLAGS)
set(CMAKE_CXX_FLAGS "${UNIQ_CMAKE_CXX_FLAGS}" CACHE STRING "C++ Compiler Base Flags" FORCE)

remove_duplicated_flags("${_CMAKE_TOOLCHAIN_COMMON_FLAGS} ${CMAKE_ASM_FLAGS}" UNIQ_CMAKE_ASM_FLAGS)
set(CMAKE_ASM_FLAGS "${UNIQ_CMAKE_ASM_FLAGS}" CACHE STRING "ASM Compiler Base Flags" FORCE)

remove_duplicated_flags("-nostartfiles ${CMAKE_EXE_LINKER_FLAGS}" UNIQ_CMAKE_SAFE_EXE_LINKER_FLAGS)
set(CMAKE_EXE_LINKER_FLAGS "${UNIQ_CMAKE_SAFE_EXE_LINKER_FLAGS}" CACHE STRING "Linker Base Flags" FORCE)