GEN	libavutil/libavutil.version
GEN	libswscale/libswscale.version
GEN	libswresample/libswresample.version
GEN	libpostproc/libpostproc.version
GEN	libavresample/libavresample.version
GEN	libavcodec/libavcodec.version
GEN	libavformat/libavformat.version
GEN	libavfilter/libavfilter.version
GEN	libavdevice/libavdevice.version
CC	libavdevice/alldevices.o
In file included from src/libavutil/internal.h:177,
                 from src/libavutil/common.h:492,
                 from src/libavutil/avutil.h:297,
                 from src/libavutil/samplefmt.h:25,
                 from src/libavcodec/avcodec.h:32,
                 from src/libavformat/avformat.h:320,
                 from src/libavformat/internal.h:28,
                 from src/libavdevice/alldevices.c:24:
src/libavutil/libm.h:451: error: static declaration of ‘roundf’ follows non-static declaration
make: *** [libavdevice/alldevices.o] Error 1