zephyr/cmake/toolchain/xcc/generic.cmake

set(TOOLCHAIN_HOME /opt/xtensa/XtDevTools/install/tools/$ENV{TOOLCHAIN_VER}/XtensaTools)

set(COMPILER gcc)

set(CROSS_COMPILE_TARGET xt)
set(SYSROOT_TARGET       xtensa-elf)

set(CROSS_COMPILE  ${TOOLCHAIN_HOME}/bin/${CROSS_COMPILE_TARGET}-)
set(SYSROOT_DIR    ${TOOLCHAIN_HOME}/${SYSROOT_TARGET})

# xt-xcc does not support -Og, so make it -O0
set(OPTIMIZE_FOR_DEBUG_FLAG "-O0")

set(CC xcc)
set(C++ xc++)

set(NOSYSDEF_CFLAG "")

list(APPEND TOOLCHAIN_C_FLAGS -fms-extensions)

# xcc doesn't have this, so we need to define it here.
# This is the same as in the xcc toolchain spec files.
list(APPEND TOOLCHAIN_C_FLAGS
  -D__SIZEOF_LONG__=4
  )