x264 mmx compile error

i486-openwrt-linux-uclibc-gcc -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -DPIC -O2 -pipe -march=i486 -fno-caller-saves -fhonour-copts -Wno-error=unused-but-set-variable -I/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/target-i386_uClibc-0.9.33/usr/include -I/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/target-i386_uClibc-0.9.33/include -I/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/toolchain-i386_gcc-4.6.2_uClibc-0.9.33/usr/include -I/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/toolchain-i386_gcc-4.6.2_uClibc-0.9.33/include -fpic -fno-strict-aliasing -std=c99 -fomit-frame-pointer -fPIC -pthread -E -o /tmp/ffconf.TfiqPYxq.o /tmp/ffconf.EiXMx4Ai.c
In file included from /tmp/ffconf.EiXMx4Ai.c:1:0:
/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/target-i386_uClibc-0.9.33/usr/include/x264.h:36:4: warning: #warning You must include stdint.h or inttypes.h before x264.h [-Wcpp]
check_func x264_encoder_encode -lx264
check_ld cc -lx264
check_cc
BEGIN /tmp/ffconf.EiXMx4Ai.c
    1   extern int x264_encoder_encode();
    2   int main(void){ x264_encoder_encode(); }
END /tmp/ffconf.EiXMx4Ai.c
i486-openwrt-linux-uclibc-gcc -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -DPIC -O2 -pipe -march=i486 -fno-caller-saves -fhonour-copts -Wno-error=unused-but-set-variable -I/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/target-i386_uClibc-0.9.33/usr/include -I/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/target-i386_uClibc-0.9.33/include -I/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/toolchain-i386_gcc-4.6.2_uClibc-0.9.33/usr/include -I/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/toolchain-i386_gcc-4.6.2_uClibc-0.9.33/include -fpic -fno-strict-aliasing -std=c99 -fomit-frame-pointer -fPIC -pthread -c -o /tmp/ffconf.TfiqPYxq.o /tmp/ffconf.EiXMx4Ai.c
i486-openwrt-linux-uclibc-gcc -L/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/target-i386_uClibc-0.9.33/usr/lib -L/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/target-i386_uClibc-0.9.33/lib -L/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/toolchain-i386_gcc-4.6.2_uClibc-0.9.33/usr/lib -L/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/toolchain-i386_gcc-4.6.2_uClibc-0.9.33/lib -Wl,--as-needed -o /tmp/ffconf.lAgnQI9K /tmp/ffconf.TfiqPYxq.o -lx264 -lmp3lame -lfaac -lm -pthread -lz
/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/target-i386_uClibc-0.9.33/usr/lib/libx264.so: undefined reference to `x264_pixel_satd_16x8_sse2'
/usr/src/trunk/bin/x86/OpenWrt-SDK-x86-for-Linux-i686-gcc-4.6.2_uClibc-0.9.33/staging_dir/target-i386_uClibc-0.9.33/usr/lib/libx264.so: undefined reference to `x264_pixel_satd_16x16_xop'