STAGING_DIR=/home/openwrt/gl-inet-mt300n-v2/master-d20f4fc/staging_dir/toolchain-mipsel_24kc_gcc-7.3.0_musl
export STAGING_DIR
CROSS=${STAGING_DIR}/bin/mipsel-openwrt-linux-musl-

CC=${CROSS}gcc

pingid:pingid.c