+CC="${CC-${cross_prefix}gcc}"
+AR="${AR-${cross_prefix}ar}"
+RANLIB="${RANLIB-${cross_prefix}ranlib}"
+STRIP="${STRIP-${cross_prefix}strip}"
+
+if [ "x$host" = x ]; then
+ host=`./config.guess`
+fi
+# normalize a triplet into a quadruplet
+host=`./config.sub $host`
+
+# split $host
+host_cpu="${host%%-*}"
+host="${host#*-}"
+host_vendor="${host%%-*}"
+host_os="${host#*-}"
+
+case $host_os in
+ beos*)
+ SYS="BEOS"
+ define HAVE_MALLOC_H
+ ;;
+ darwin*)
+ SYS="MACOSX"
+ CFLAGS="$CFLAGS -falign-loops=16"
+ LDFLAGS="$LDFLAGS -lm"
+ if [ "$pic" = "no" ]; then
+ cc_check "" -mdynamic-no-pic && CFLAGS="$CFLAGS -mdynamic-no-pic"
+ fi
+ ;;
+ freebsd*)
+ SYS="FREEBSD"
+ LDFLAGS="$LDFLAGS -lm"
+ ;;
+ kfreebsd*-gnu)
+ SYS="FREEBSD"
+ define HAVE_MALLOC_H
+ LDFLAGS="$LDFLAGS -lm"
+ ;;
+ netbsd*)
+ SYS="NETBSD"
+ LDFLAGS="$LDFLAGS -lm"
+ ;;
+ openbsd*)
+ SYS="OPENBSD"
+ CFLAGS="$CFLAGS -I/usr/X11R6/include"
+ LDFLAGS="$LDFLAGS -lm"
+ ;;
+ *linux*)
+ SYS="LINUX"
+ define HAVE_MALLOC_H
+ LDFLAGS="$LDFLAGS -lm"
+ ;;
+ cygwin*)
+ SYS="MINGW"
+ EXE=".exe"
+ DEVNULL="NUL"
+ if cc_check "" -mno-cygwin; then
+ CFLAGS="$CFLAGS -mno-cygwin"
+ LDFLAGS="$LDFLAGS -mno-cygwin"
+ fi
+ ;;
+ mingw*)
+ SYS="MINGW"
+ EXE=".exe"
+ DEVNULL="NUL"
+ ;;
+ sunos*|solaris*)
+ SYS="SunOS"
+ define HAVE_MALLOC_H
+ LDFLAGS="$LDFLAGS -lm"
+ HAVE_GETOPT_LONG=0
+ ;;
+ *)
+ die "Unknown system $host, edit the configure"
+ ;;
+esac
+
+case $host_cpu in
+ i*86)
+ ARCH="X86"
+ AS="yasm"
+ ASFLAGS="$ASFLAGS -O2"
+ if [[ "$asm" == yes && "$CFLAGS" != *-march* ]]; then
+ CFLAGS="$CFLAGS -march=i686"
+ fi
+ if [[ "$asm" == yes && "$CFLAGS" != *-mfpmath* ]]; then
+ CFLAGS="$CFLAGS -mfpmath=sse -msse"
+ fi
+ if [ "$SYS" = MACOSX ]; then
+ ASFLAGS="$ASFLAGS -f macho -DPREFIX"
+ elif [ "$SYS" = MINGW ]; then
+ ASFLAGS="$ASFLAGS -f win32 -DPREFIX"
+ else
+ ASFLAGS="$ASFLAGS -f elf"
+ fi
+ ;;
+ x86_64)
+ ARCH="X86_64"
+ AS="yasm"
+ if [ "$SYS" = MACOSX ];then
+ ASFLAGS="$ASFLAGS -f macho64 -m amd64 -DPIC -DPREFIX"
+ if cc_check '' "-arch x86_64"; then
+ CFLAGS="$CFLAGS -arch x86_64"
+ LDFLAGS="$LDFLAGS -arch x86_64"
+ fi
+ elif [ "$SYS" = MINGW ]; then
+ ASFLAGS="$ASFLAGS -f win32 -m amd64 -DPREFIX"
+ else
+ ASFLAGS="$ASFLAGS -f elf -m amd64"
+ fi
+ ;;
+ powerpc|powerpc64)
+ ARCH="PPC"
+ if [ $SYS = MACOSX ]
+ then
+ CFLAGS="$CFLAGS -faltivec -fastf -mcpu=G4"
+ else
+ CFLAGS="$CFLAGS -maltivec -mabi=altivec"
+ define HAVE_ALTIVEC_H
+ fi
+ ;;
+ sparc)
+ if test "$(uname -m)" = "sun4u"; then
+ ARCH="UltraSparc"
+ CFLAGS="$CFLAGS -mcpu=ultrasparc"
+ LDFLAGS="$LDFLAGS -mcpu=ultrasparc"
+ AS="${cross_prefix}as"
+ ASFLAGS="$ASFLAGS -xarch=v8plusa"
+ else
+ ARCH="Sparc"
+ fi
+ ;;
+ mips|mipsel|mips64|mips64el)
+ ARCH="MIPS"
+ ;;
+ arm*)
+ ARCH="ARM"
+ AS="${AS-${cross_prefix}gcc}"
+ ;;
+ s390|s390x)
+ ARCH="S390"
+ ;;
+ parisc|parisc64)
+ ARCH="PARISC"
+ ;;
+ *)
+ ARCH="$(echo $host_cpu | tr a-z A-Z)"
+ ;;
+esac
+
+log_msg "x264 configure script"
+if [ -n "$*" ]; then
+ msg="Command line options:"
+ for i in $@; do
+ msg="$msg \"$i\""
+ done
+ log_msg "$msg"
+fi
+log_msg ""
+
+# check requirements
+
+cc_check || die "No working C compiler found."
+
+if cc_check '' -std=gnu99 ; then
+ CFLAGS="$CFLAGS -std=gnu99"
+elif cc_check '' -std=c99 ; then
+ CFLAGS="$CFLAGS -std=c99 -D_POSIX_C_SOURCE=200112L -D_BSD_SOURCE"
+fi
+
+if [ $shared = yes -a \( $ARCH = "X86_64" -o $ARCH = "PPC" -o $ARCH = "ALPHA" -o $ARCH = "ARM" \) ] ; then
+ pic="yes"
+fi
+
+if [ $asm = yes -a \( $ARCH = X86 -o $ARCH = X86_64 \) ] ; then
+ if ! as_check "lzcnt eax, eax" ; then
+ VER=`($AS --version || echo no assembler) 2>$DEVNULL | head -n 1`
+ echo "Found $VER"
+ echo "Minimum version is yasm-0.6.2"
+ echo "If you really want to compile without asm, configure with --disable-asm."
+ exit 1
+ fi
+ if ! cc_check '' '' '__asm__("pabsw %xmm0, %xmm0");' ; then
+ VER=`(as --version || echo no gnu as) 2>$DEVNULL | head -n 1`
+ echo "Found $VER"
+ echo "Minimum version is binutils-2.17"
+ echo "Your compiler can't handle inline SSSE3 asm."
+ echo "If you really want to compile without asm, configure with --disable-asm."
+ exit 1
+ fi
+ define HAVE_MMX
+fi
+
+if [ $asm = yes -a $ARCH = ARM ] ; then
+ # set flags so neon is built by default
+ echo $CFLAGS | grep -Eq '(-mcpu|-march|-mfpu|-mfloat-abi)' || CFLAGS="$CFLAGS -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp"
+
+ if cc_check '' '' '__asm__("rev ip, ip");' ; then define HAVE_ARMV6 && ASFLAGS="$ASFLAGS -DHAVE_ARMV6"
+ cc_check '' '' '__asm__("movt r0, #0");' && define HAVE_ARMV6T2 && ASFLAGS="$ASFLAGS -DHAVE_ARMV6T2"
+ cc_check '' '' '__asm__("vadd.i16 q0, q0, q0");' && define HAVE_NEON && ASFLAGS="$ASFLAGS -DHAVE_NEON"
+ ASFLAGS="$ASFLAGS -c"
+ else
+ echo "You specified a pre-ARMv6 or Thumb-1 CPU in your CFLAGS."
+ echo "If you really want to run on such a CPU, configure with --disable-asm."
+ exit 1
+ fi
+fi
+
+[ $asm = no ] && AS=""
+[ "x$AS" = x ] && asm="no"
+
+define ARCH_$ARCH
+define SYS_$SYS
+
+echo "int i = 0x42494745; double f = 0x1.0656e6469616ep+102;" > conftest.c
+$CC $CFLAGS conftest.c -c -o conftest.o 2>$DEVNULL || die "endian test failed"
+if grep -q BIGE conftest.o && grep -q FPendian conftest.o ; then
+ define WORDS_BIGENDIAN
+elif !(grep -q EGIB conftest.o && grep -q naidnePF conftest.o) ; then
+ die "endian test failed"
+fi
+