通过查看 toolchain/toolchain-external/ext-toolchain-wrapper.c 源文件，可以得知，设置BR_DEBUG_WRAPPER环境变量可以输出参数信息

进到 /home/lvdata/develop/class_by_os/linux/buildroot/out_of_build/armv5te_build_out/目录，

BR_DEBUG_WRAPPER=1  ./host/usr/bin/arm-none-linux-gnueabi-gcc

或

export BR_DEBUG_WRAPPER=1

./host/usr/bin/arm-none-linux-gnueabi-gcc

或者加到 out_of_build.sh脚本中

#!/bin/bashexport BR_DEBUG_WRAPPER=1export LC_ALL=Cexport LANG=C#export BUILDROOT_DL_DIR="下载目录位置"REPO_DIR=$(pwd)/../../buildroot_reposecho "make -C ${REPO_DIR} O=$(pwd) $@"make -C ${REPO_DIR}  O=$(pwd) $@#make manual-txtExecuting /home/lvdata/develop/class_by_os/linux/buildroot/out_of_build/armv5te_build_out/host/opt/ext-toolchain/bin/arm-none-linux-gnueabi-gcc --sysroot /home/lvdata/develop/class_by_os/linux/buildroot/out_of_build/armv5te_build_out/host/usr/arm-buildroot-linux-gnueabi/sysroot -march=armv5te -mtune=arm926ej-s -mabi=aapcs-linux -msoft-float -marm -pipe -mfloat-abi=soft

可以看到使用的是arm926ej-s的cpu架构