3516EV100 ffmpeg的最小编译。

有2个疑问求助
1）3516EV100所在的编译linux虚拟机是不是一定要是32位的？
2）我的configure文件始终提示如下错误：
./configure --prefix=/usr/local/ffmpeg \
--enable-cross-compile \
--arch=arm \
--cpu=cortex-a7 \
--target-os=linux\
--cross-prefix=/opt/hisi-linux/x86-arm/arm-hisiv500-linux/target/bin/arm-hisiv500-linux- \
--cc=/opt/hisi-linux/x86-arm/arm-hisiv500-linux/target/bin/arm-hisiv500-linux-gcc \
--extra-cflags="-o2 -mcpu=cortex-a7 -mfloat-abi=softfp -mfpu=neon-vfpv4 -mno-unaligned-access -fno-aggressive-loop-optimizations -I/opt/hisi-linux/x86-arm/arm-hisiv500-linux/target/usr/include" \
--extra-ld="/opt/hisi-linux/x86-arm/arm-hisiv500-linux/target/bin/arm-hisiv500-linux-gcc -o" \
--extra-ldflags="-static -s mcpu=cortex-a7 -mfloat-abi=softfp -mfpu=neon-vfpv4 -mno-unaligned-access -fno-aggressive-loop-optimizations -L/lib -lm -L/opt/hisi-linux/x86-arm/arm-hisiv500-linux/target/lib  -lpthread -L/opt/hisi-linux/x86-arm/arm-hisiv500-linux/target/lib -ldl -L/opt/hisi-linux/x86-arm/arm-hisiv500-linux/lib/gcc/arm-hisiv500-linux-uclibcgnueabi -lgcc" \
--strip=/opt/hisi-linux/x86-arm/arm-hisiv500-linux/target/bin/arm-hisiv500-linux-strip \
--ar=/opt/hisi-linux/x86-arm/arm-hisiv500-linux/target/bin/arm-hisiv500-linux-ar \
--enable-small \
--disable-safe-bitstream-reader \
--disable-programs \
--disable-avdevice \
--enable-pthreads \
--enable-shared \
--disable-static \
--enable-network \
--disable-doc \
--disable-encoders \
--disable-decoders \
--enable-decoder=h264 \
--enable-decoder=hevc \
--disable-hwaccels \
--disable-swresample \
--disable-swscale \
--disable-postproc \
--disable-parsers \
--enable-parser=h264 \
--enable-parser=hevc \
--disable-demuxers \
--enable-demuxer=rtsp \
--enable-demuxer=h264 \
--enable-demuxer=hevc \
--disable-muxers \
--disable-protocols \
--disable-filters \
--disable-bsfs \
--enable-bsf=h264_metadata \
--enable-bsf=hevc_metadata \
--disable-debug \
--enable-pic \
--enable-gpl

======================

Unknown option "--extra-ld=/opt/hisi-linux/x86-arm/arm-hisiv500-linux/target/bin/arm-hisiv500-linux-gcc".