gcc -Wno-maybe-uninitialized -Wshadow -O3 -ffast-math -m64  -Wall -I. -I. -std=gnu99 -mpreferred-stack-boundary=5     -fomit-frame-pointer -fno-tree-vectorize   -c -o x264.o x264.c
x264.c: In function ‘print_csp_names’:
x264.c:437:15: error: variable ‘i’ has initializer but incomplete type
     for( enum PixelFormat i = AV_PIX_FMT_NONE+1; i < AV_PIX_FMT_NB; i++ )
               ^
x264.c:437:27: error: storage size of ‘i’ isn’t known
     for( enum PixelFormat i = AV_PIX_FMT_NONE+1; i < AV_PIX_FMT_NB; i++ )
                           ^
x264.c:437:5: error: ‘enum PixelFormat’ declared in ‘for’ loop initial declaration
     for( enum PixelFormat i = AV_PIX_FMT_NONE+1; i < AV_PIX_FMT_NB; i++ )
     ^
x264.c:437:27: warning: unused variable ‘i’ [-Wunused-variable]
     for( enum PixelFormat i = AV_PIX_FMT_NONE+1; i < AV_PIX_FMT_NB; i++ )
                           ^
<builtin>: recipe for target 'x264.o' failed
make: *** [x264.o] Error 1