AV_GCC_VERSION_AT_MOST   47 libavutil/arm/bswap.h #if AV_GCC_VERSION_AT_MOST(4,4)
AV_GCC_VERSION_AT_MOST   26 libavutil/arm/intreadwrite.h #if HAVE_FAST_UNALIGNED && HAVE_INLINE_ASM && AV_GCC_VERSION_AT_MOST(4,6)
AV_GCC_VERSION_AT_MOST   33 libavutil/arm/intreadwrite.h #if AV_GCC_VERSION_AT_MOST(4,5)
AV_GCC_VERSION_AT_MOST   60 libavutil/x86/bswap.h #if AV_GCC_VERSION_AT_MOST(4,0)
AV_GCC_VERSION_AT_MOST   69 libavutil/x86/bswap.h #if AV_GCC_VERSION_AT_MOST(4,4) || defined(__INTEL_COMPILER)