ubuntu在編譯ffmpeg包的時候需要用到之前編譯的x264，錯誤提示 libx264 not found.查看了config.log,后面出現了一堆：ratecontrol.c:(.text+0x7a33): undefined reference to `__pow_finite'/usr/local/lib/libx264.a(ratecontrol.o): In function `x264_ratecontrol_slice_type':ratecontrol.c:(.text+0x85ca): undefined reference to `__log2_finite'ratecontrol.c:(.text+0x8633): undefined reference to `__log2_finite'ratecontrol.c:(.text+0x878c): undefined reference to `__pow_finite'ratecontrol.c:(.text+0x87e1): undefined reference to `__pow_finite'/usr/local/lib/libx264.a(ratecontrol.o): In function `x264_ratecontrol_end':ratecontrol.c:(.text+0x8c1f): undefined reference to `__pow_finite'