problem of cross compile gopacket in mips

[superironbird]

I got a problem of cross compiling program based on gopacket :
the env of go is-------->
GOARCH="mips"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/root/go"
GORACE=""
GOROOT="/usr/local/go"
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="mips-linux-gcc"
GOGCCFLAGS="-fPIC -mabi=32 -march=mips32 -pthread -fmessage-length=0"
CXX="mips-linux-g++"
CGO_ENABLED="1"
CGO_CFLAGS="-I/usr/include"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-L/root/Desktop/libpcap-1.9.0"
PKG_CONFIG="pkg-config"

the result of it is:

runtime/cgo

cc1: warnings being treated as errors
In file included from gcc_libinit.c:8:
/usr/include/pthread.h:675: Warning：‘regparm’ attribute directive ignored
/usr/include/pthread.h:687: Warning：‘regparm’ attribute directive ignored
/usr/include/pthread.h:732: Warning：‘regparm’ attribute directive ignored

I change the include path to "-I/root/Desktop/libpcap-1.9.0" ,the result is:
loading DWARF type: decoding dwarf section info at offset 0x157: unexpected opcode

I have no idea about that.Can u help me?: )