gcc -Wall -O3 -fforce-addr -fomit-frame-pointer -finline-functions -funroll-loops -o dump_video.exe dump_video.o  ../lib/.libs/libtheora.a -LC:/mingw/lib C:/mingw/lib/libogg.a
dump_video.o(.text+0xb45):dump_video.c: undefined reference to `gettimeofday'
dump_video.o(.text+0xb63):dump_video.c: undefined reference to `gettimeofday'
dump_video.o(.text+0xb6d):dump_video.c: undefined reference to `gettimeofday'
make[2]: *** [dump_video.exe] Error 1
make[2]: Leaving directory `/home/User/libtheora-1.0alpha7/examples'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/User/libtheora-1.0alpha7'
make: *** [all] Error 2