交叉编译编译ffmpeg：ERROR: x265 not found using pkg-config（未解决）

• 具体错误

  ERROR: x265 not found using pkg-config

  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
  ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.libera.chat.
  Include the log file "ffbuild/config.log" produced by configure as this will help
  solve the problem.

• 说明

实际上都已经配置了：

export PKG_CONFIG_PATH=${BUILD_DIR}/lib/pkgconfig:${PKG_CONFIG_PATH}

./configure \
    --pkgconfigdir=${PKG_CONFIG_PATH} \
    --extra-cflags="-I${BUILD_DIR}/include" \
    --extra-ldflags="-L${BUILD_DIR}/lib" \

......

x264就没问题，x265就死活找不到。而x265是确实编译输出到相应目录。

可能是需要的链接库不对？或者是接口变了？