ffmpeg+libopus出错：ERROR: opus not found

[嵌入式乌托邦]

在编译含有libopus的ffmpeg时，出错了，ERROR: opus not found
libopus编译：
./configure --host=arm-linux --prefix=/usr/local/ffmpeg/ --enable-fixed-point --enable-shared --disable-static
/usr/local/ffmpeg下也能看到各种库生成了，
ffmpeg编译：
./configure --prefix=/usr/local/ffmpeg --enable-version3 --cross-prefix=arm-linux- --enable-cross-compile --target-os=linux --cc=arm-linux-gcc --arch=arm --prefix=/usr/local/ffmpeg --enable-shared --disable-static --enable-gpl --enable-nonfree --enable-ffmpeg --disable-ffplay --disable-ffserver --enable-pthreads --disable-armv5te --disable-armv6 --disable-armv6t2 --disable-yasm --disable-stripping --enable-swscale --enable-indev=oss --enable-libfaac --enable-libvo-aacenc --enable-libtwolame --enable-libvo-amrwbenc --enable-libopus --extra-cflags=-I/usr/local/ffmpeg/include --extra-ldflags=-L/usr/local/ffmpeg/lib


ERROR: opus not found

If you think configure made a mistake, make sure you are using the latest
version from Git. If the latest version fails, report the problem to the
[e-mail] mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.log" produced by configure as this will help
solving the problem.

google了一下，说是要export PKG_CONFIG_PATH=/usr/local/ffmpeg/lib/pkgconfig,我试了，还是不行。

[嵌入式乌托邦]

有没有碰到过这个问题的？

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[嵌入式乌托邦]

在这里有个一样的情况，我export PKG_CONFIG_PATH后却还是不行，只要编译选项内去掉这个--enable-libopus就没问题了。