libvpx: Pull from upstream

source/libvpx/build/make/configure.sh

 #!/bin/sh
 ##
 ##  configure.sh
 ##
 ##  This script is sourced by the main configure script and contains
 ##  utility functions and other common bits that aren't strictly libvpx
 ##  related.
 ##
 ##  This build system is based in part on the FFmpeg configure script.
 ##
 
 
 #
 # Logging / Output Functions
 #
 die_unknown(){
-    echo "Unknown option \"$1\"."
-    echo "See $0 --help for available options."
-    clean_temp_files
-    exit 1
+  echo "Unknown option \"$1\"."
+  echo "See $0 --help for available options."
+  clean_temp_files
+  exit 1
 }
 
-
 die() {
-    echo "$@"
-    echo
-    echo "Configuration failed. This could reflect a misconfiguration of your"
-    echo "toolchains, improper options selected, or another problem. If you"
-    echo "don't see any useful error messages above, the next step is to look"
-    echo "at the configure error log file ($logfile) to determine what"
-    echo "configure was trying to do when it died."
-    clean_temp_files
-    exit 1
+  echo "$@"
+  echo
+  echo "Configuration failed. This could reflect a misconfiguration of your"
+  echo "toolchains, improper options selected, or another problem. If you"
+  echo "don't see any useful error messages above, the next step is to look"
+  echo "at the configure error log file ($logfile) to determine what"
+  echo "configure was trying to do when it died."
+  clean_temp_files
+  exit 1
 }
 
-
 log(){
-    echo "$@" >>$logfile
+  echo "$@" >>$logfile
 }
 
-
 log_file(){
-    log BEGIN $1
-    cat -n $1 >>$logfile
-    log END $1
+  log BEGIN $1
+  cat -n $1 >>$logfile
+  log END $1
 }
 
-
 log_echo() {
-    echo "$@"
-    log "$@"
+  echo "$@"
+  log "$@"
 }
 
-
 fwrite () {
-    outfile=$1
-    shift
-    echo "$@" >> ${outfile}
+  outfile=$1
+  shift
+  echo "$@" >> ${outfile}
 }
 
+show_help_pre(){
+  for opt in ${CMDLINE_SELECT}; do
+    opt2=`echo $opt | sed -e 's;_;-;g'`
+    if enabled $opt; then
+      eval "toggle_${opt}=\"--disable-${opt2}\""
+    else
+      eval "toggle_${opt}=\"--enable-${opt2} \""
+    fi
+  done
 
-show_help_pre(){
-    for opt in ${CMDLINE_SELECT}; do
-        opt2=`echo $opt | sed -e 's;_;-;g'`
-        if enabled $opt; then
-            eval "toggle_${opt}=\"--disable-${opt2}\""
-        else
-            eval "toggle_${opt}=\"--enable-${opt2} \""
-        fi
-    done
-
-    cat <<EOF
+  cat <<EOF
 Usage: configure [options]
 Options:
 
 Build options:
   --help                      print this message
   --log=yes|no|FILE           file configure log is written to [config.log]
   --target=TARGET             target platform tuple [generic-gnu]
   --cpu=CPU                   optimize for a specific cpu rather than a family
   --extra-cflags=ECFLAGS      add ECFLAGS to CFLAGS [$CFLAGS]
   ${toggle_extra_warnings}    emit harmless warnings (always non-fatal)
@@ skipping 10 matching lines @@
 Install options:
   ${toggle_install_docs}      control whether docs are installed
   ${toggle_install_bins}      control whether binaries are installed
   ${toggle_install_libs}      control whether libraries are installed
   ${toggle_install_srcs}      control whether sources are installed
 
 
 EOF
 }
 
-
 show_help_post(){
-    cat <<EOF
+  cat <<EOF
 
 
 NOTES:
     Object files are built at the place where configure is launched.
 
     All boolean options can be negated. The default value is the opposite
     of that shown above. If the option --disable-foo is listed, then
     the default value for foo is enabled.
 
 Supported targets:
 EOF
   show_targets ${all_platforms}
   echo
   exit 1
 }
 
-
 show_targets() {
-    while [ -n "$*" ]; do
-        if [ "${1%%-*}" = "${2%%-*}" ]; then
-            if [ "${2%%-*}" = "${3%%-*}" ]; then
-                printf "    %-24s %-24s %-24s\n" "$1" "$2" "$3"
-                shift; shift; shift
-            else
-                printf "    %-24s %-24s\n" "$1" "$2"
-                shift; shift
-            fi
-        else
-            printf "    %-24s\n" "$1"
-            shift
-        fi
-    done
+  while [ -n "$*" ]; do
+    if [ "${1%%-*}" = "${2%%-*}" ]; then
+      if [ "${2%%-*}" = "${3%%-*}" ]; then
+        printf "    %-24s %-24s %-24s\n" "$1" "$2" "$3"
+        shift; shift; shift
+      else
+        printf "    %-24s %-24s\n" "$1" "$2"
+        shift; shift
+      fi
+    else
+      printf "    %-24s\n" "$1"
+      shift
+    fi
+  done
 }
 
-
 show_help() {
-    show_help_pre
-    show_help_post
+  show_help_pre
+  show_help_post
 }
 
 #
 # List Processing Functions
 #
 set_all(){
-    value=$1
-    shift
-    for var in $*; do
-        eval $var=$value
-    done
+  value=$1
+  shift
+  for var in $*; do
+    eval $var=$value
+  done
 }
 
-
 is_in(){
-    value=$1
-    shift
-    for var in $*; do
-        [ $var = $value ] && return 0
-    done
-    return 1
+  value=$1
+  shift
+  for var in $*; do
+    [ $var = $value ] && return 0
+  done
+  return 1
 }
 
-
 add_cflags() {
-    CFLAGS="${CFLAGS} $@"
-    CXXFLAGS="${CXXFLAGS} $@"
+  CFLAGS="${CFLAGS} $@"
+  CXXFLAGS="${CXXFLAGS} $@"
 }
 
-
 add_cflags_only() {
-    CFLAGS="${CFLAGS} $@"
+  CFLAGS="${CFLAGS} $@"
 }
 
-
 add_cxxflags_only() {
-    CXXFLAGS="${CXXFLAGS} $@"
+  CXXFLAGS="${CXXFLAGS} $@"
 }
 
-
 add_ldflags() {
-    LDFLAGS="${LDFLAGS} $@"
+  LDFLAGS="${LDFLAGS} $@"
 }
 
-
 add_asflags() {
-    ASFLAGS="${ASFLAGS} $@"
+  ASFLAGS="${ASFLAGS} $@"
 }
 
-
 add_extralibs() {
-    extralibs="${extralibs} $@"
+  extralibs="${extralibs} $@"
 }
 
 #
 # Boolean Manipulation Functions
 #
 enable_feature(){
-    set_all yes $*
+  set_all yes $*
 }
 
 disable_feature(){
-    set_all no $*
+  set_all no $*
 }
 
 enabled(){
-    eval test "x\$$1" = "xyes"
+  eval test "x\$$1" = "xyes"
 }
 
 disabled(){
-    eval test "x\$$1" = "xno"
+  eval test "x\$$1" = "xno"
 }
 
-
 soft_enable() {
-    for var in $*; do
-        if ! disabled $var; then
-            log_echo "  enabling $var"
-            enable_feature $var
-        fi
-    done
+  for var in $*; do
+    if ! disabled $var; then
+      log_echo "  enabling $var"
+      enable_feature $var
+    fi
+  done
 }
 
 soft_disable() {
-    for var in $*; do
-        if ! enabled $var; then
-            log_echo "  disabling $var"
-            disable_feature $var
-        fi
-    done
+  for var in $*; do
+    if ! enabled $var; then
+      log_echo "  disabling $var"
+      disable_feature $var
+    fi
+  done
 }
 
-
 #
 # Text Processing Functions
 #
 toupper(){
-    echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
+  echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
 }
 
-
 tolower(){
-    echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
+  echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
 }
 
-
 #
 # Temporary File Functions
 #
 source_path=${0%/*}
 enable_feature source_path_used
 if [ -z "$source_path" ] || [ "$source_path" = "." ]; then
-    source_path="`pwd`"
-    disable_feature source_path_used
+  source_path="`pwd`"
+  disable_feature source_path_used
 fi
 
 if test ! -z "$TMPDIR" ; then
-    TMPDIRx="${TMPDIR}"
+  TMPDIRx="${TMPDIR}"
 elif test ! -z "$TEMPDIR" ; then
-    TMPDIRx="${TEMPDIR}"
+  TMPDIRx="${TEMPDIR}"
 else
-    TMPDIRx="/tmp"
+  TMPDIRx="/tmp"
 fi
 RAND=$(awk 'BEGIN { srand(); printf "%d\n",(rand() * 32768)}')
 TMP_H="${TMPDIRx}/vpx-conf-$$-${RAND}.h"
 TMP_C="${TMPDIRx}/vpx-conf-$$-${RAND}.c"
 TMP_CC="${TMPDIRx}/vpx-conf-$$-${RAND}.cc"
 TMP_O="${TMPDIRx}/vpx-conf-$$-${RAND}.o"
 TMP_X="${TMPDIRx}/vpx-conf-$$-${RAND}.x"
 TMP_ASM="${TMPDIRx}/vpx-conf-$$-${RAND}.asm"
 
 clean_temp_files() {
-    rm -f ${TMP_C} ${TMP_CC} ${TMP_H} ${TMP_O} ${TMP_X} ${TMP_ASM}
-    enabled gcov && rm -f ${TMP_C%.c}.gcno ${TMP_CC%.cc}.gcno
+  rm -f ${TMP_C} ${TMP_CC} ${TMP_H} ${TMP_O} ${TMP_X} ${TMP_ASM}
+  enabled gcov && rm -f ${TMP_C%.c}.gcno ${TMP_CC%.cc}.gcno
 }
 
 #
 # Toolchain Check Functions
 #
 check_cmd() {
-    enabled external_build && return
-    log "$@"
-    "$@" >>${logfile} 2>&1
+  enabled external_build && return
+  log "$@"
+  "$@" >>${logfile} 2>&1
 }
 
 check_cc() {
-    log check_cc "$@"
-    cat >${TMP_C}
-    log_file ${TMP_C}
-    check_cmd ${CC} ${CFLAGS} "$@" -c -o ${TMP_O} ${TMP_C}
+  log check_cc "$@"
+  cat >${TMP_C}
+  log_file ${TMP_C}
+  check_cmd ${CC} ${CFLAGS} "$@" -c -o ${TMP_O} ${TMP_C}
 }
 
 check_cxx() {
-    log check_cxx "$@"
-    cat >${TMP_CC}
-    log_file ${TMP_CC}
-    check_cmd ${CXX} ${CXXFLAGS} "$@" -c -o ${TMP_O} ${TMP_CC}
+  log check_cxx "$@"
+  cat >${TMP_CC}
+  log_file ${TMP_CC}
+  check_cmd ${CXX} ${CXXFLAGS} "$@" -c -o ${TMP_O} ${TMP_CC}
 }
 
 check_cpp() {
-    log check_cpp "$@"
-    cat > ${TMP_C}
-    log_file ${TMP_C}
-    check_cmd ${CC} ${CFLAGS} "$@" -E -o ${TMP_O} ${TMP_C}
+  log check_cpp "$@"
+  cat > ${TMP_C}
+  log_file ${TMP_C}
+  check_cmd ${CC} ${CFLAGS} "$@" -E -o ${TMP_O} ${TMP_C}
 }
 
 check_ld() {
-    log check_ld "$@"
-    check_cc $@ \
-        && check_cmd ${LD} ${LDFLAGS} "$@" -o ${TMP_X} ${TMP_O} ${extralibs}
+  log check_ld "$@"
+  check_cc $@ \
+    && check_cmd ${LD} ${LDFLAGS} "$@" -o ${TMP_X} ${TMP_O} ${extralibs}
 }
 
 check_header(){
-    log check_header "$@"
-    header=$1
-    shift
-    var=`echo $header | sed 's/[^A-Za-z0-9_]/_/g'`
-    disable_feature $var
-    check_cpp "$@" <<EOF && enable_feature $var
+  log check_header "$@"
+  header=$1
+  shift
+  var=`echo $header | sed 's/[^A-Za-z0-9_]/_/g'`
+  disable_feature $var
+  check_cpp "$@" <<EOF && enable_feature $var
 #include "$header"
 int x;
 EOF
 }
 
-
 check_cflags() {
-    log check_cflags "$@"
-    check_cc -Werror "$@" <<EOF
+ log check_cflags "$@"
+ check_cc -Werror "$@" <<EOF
 int x;
 EOF
 }
 
 check_cxxflags() {
-    log check_cxxflags "$@"
+  log check_cxxflags "$@"
 
-    # Catch CFLAGS that trigger CXX warnings
-    case "$CXX" in
-      *c++-analyzer|*clang++|*g++*) check_cxx -Werror "$@" <<EOF
+  # Catch CFLAGS that trigger CXX warnings
+  case "$CXX" in
+    *c++-analyzer|*clang++|*g++*)
+      check_cxx -Werror "$@" <<EOF
 int x;
 EOF
       ;;
-      *) check_cxx -Werror "$@" <<EOF
+    *)
+      check_cxx -Werror "$@" <<EOF
 int x;
 EOF
       ;;
     esac
 }
 
 check_add_cflags() {
-    check_cxxflags "$@" && add_cxxflags_only "$@"
-    check_cflags "$@" && add_cflags_only "$@"
+  check_cxxflags "$@" && add_cxxflags_only "$@"
+  check_cflags "$@" && add_cflags_only "$@"
 }
 
 check_add_asflags() {
-    log add_asflags "$@"
-    add_asflags "$@"
+  log add_asflags "$@"
+  add_asflags "$@"
 }
 
 check_add_ldflags() {
-    log add_ldflags "$@"
-    add_ldflags "$@"
+  log add_ldflags "$@"
+  add_ldflags "$@"
 }
 
 check_asm_align() {
-    log check_asm_align "$@"
-    cat >${TMP_ASM} <<EOF
+  log check_asm_align "$@"
+  cat >${TMP_ASM} <<EOF
 section .rodata
 align 16
 EOF
-    log_file ${TMP_ASM}
-    check_cmd ${AS} ${ASFLAGS} -o ${TMP_O} ${TMP_ASM}
-    readelf -WS ${TMP_O} >${TMP_X}
-    log_file ${TMP_X}
-    if ! grep -q '\.rodata .* 16$' ${TMP_X}; then
-        die "${AS} ${ASFLAGS} does not support section alignment (nasm <=2.08?)"
-    fi
+  log_file ${TMP_ASM}
+  check_cmd ${AS} ${ASFLAGS} -o ${TMP_O} ${TMP_ASM}
+  readelf -WS ${TMP_O} >${TMP_X}
+  log_file ${TMP_X}
+  if ! grep -q '\.rodata .* 16$' ${TMP_X}; then
+    die "${AS} ${ASFLAGS} does not support section alignment (nasm <=2.08?)"
+  fi
 }
 
 # tests for -m$1 toggling the feature given in $2. If $2 is empty $1 is used.
 check_gcc_machine_option() {
-    opt="$1"
-    feature="$2"
-    [ -n "$feature" ] || feature="$opt"
+  opt="$1"
+  feature="$2"
+  [ -n "$feature" ] || feature="$opt"
 
-    if enabled gcc && ! disabled "$feature" && ! check_cflags "-m$opt"; then
-        RTCD_OPTIONS="${RTCD_OPTIONS}--disable-$feature "
-    else
-        soft_enable "$feature"
-    fi
+  if enabled gcc && ! disabled "$feature" && ! check_cflags "-m$opt"; then
+    RTCD_OPTIONS="${RTCD_OPTIONS}--disable-$feature "
+  else
+    soft_enable "$feature"
+  fi
 }
 
 write_common_config_banner() {
-    print_webm_license config.mk "##" ""
-    echo '# This file automatically generated by configure. Do not edit!' >> config.mk
-    echo "TOOLCHAIN := ${toolchain}" >> config.mk
+  print_webm_license config.mk "##" ""
+  echo '# This file automatically generated by configure. Do not edit!' >> config.mk
+  echo "TOOLCHAIN := ${toolchain}" >> config.mk
 
-    case ${toolchain} in
-        *-linux-rvct)
-            echo "ALT_LIBC := ${alt_libc}" >> config.mk
-            ;;
-    esac
+  case ${toolchain} in
+    *-linux-rvct)
+      echo "ALT_LIBC := ${alt_libc}" >> config.mk
+      ;;
+  esac
 }
 
 write_common_config_targets() {
-    for t in ${all_targets}; do
-        if enabled ${t}; then
-            if enabled universal || enabled child; then
-                fwrite config.mk "ALL_TARGETS += ${t}-${toolchain}"
-            else
-                fwrite config.mk "ALL_TARGETS += ${t}"
-            fi
-        fi
+  for t in ${all_targets}; do
+    if enabled ${t}; then
+      if enabled universal || enabled child; then
+        fwrite config.mk "ALL_TARGETS += ${t}-${toolchain}"
+      else
+        fwrite config.mk "ALL_TARGETS += ${t}"
+      fi
+    fi
     true;
-    done
-true
+  done
+  true
 }
 
 write_common_target_config_mk() {
-    saved_CC="${CC}"
-    saved_CXX="${CXX}"
-    enabled ccache && CC="ccache ${CC}"
-    enabled ccache && CXX="ccache ${CXX}"
-    print_webm_license $1 "##" ""
+  saved_CC="${CC}"
+  saved_CXX="${CXX}"
+  enabled ccache && CC="ccache ${CC}"
+  enabled ccache && CXX="ccache ${CXX}"
+  print_webm_license $1 "##" ""
 
-    cat >> $1 << EOF
+  cat >> $1 << EOF
 # This file automatically generated by configure. Do not edit!
 SRC_PATH="$source_path"
 SRC_PATH_BARE=$source_path
 BUILD_PFX=${BUILD_PFX}
 TOOLCHAIN=${toolchain}
 ASM_CONVERSION=${asm_conversion_cmd:-${source_path}/build/make/ads2gas.pl}
 GEN_VCPROJ=${gen_vcproj_cmd}
 MSVS_ARCH_DIR=${msvs_arch_dir}
 
 CC=${CC}
 CXX=${CXX}
 AR=${AR}
 LD=${LD}
 AS=${AS}
 STRIP=${STRIP}
 NM=${NM}
 
 CFLAGS  = ${CFLAGS}
 CXXFLAGS  = ${CXXFLAGS}
 ARFLAGS = -rus\$(if \$(quiet),c,v)
 LDFLAGS = ${LDFLAGS}
 ASFLAGS = ${ASFLAGS}
 extralibs = ${extralibs}
 AS_SFX    = ${AS_SFX:-.asm}
 EXE_SFX   = ${EXE_SFX}
 VCPROJ_SFX = ${VCPROJ_SFX}
 RTCD_OPTIONS = ${RTCD_OPTIONS}
 EOF
 
-    if enabled rvct; then cat >> $1 << EOF
+  if enabled rvct; then cat >> $1 << EOF
 fmt_deps = sed -e 's;^__image.axf;\${@:.d=.o} \$@;' #hide
 EOF
-    else cat >> $1 << EOF
+  else cat >> $1 << EOF
 fmt_deps = sed -e 's;^\([a-zA-Z0-9_]*\)\.o;\${@:.d=.o} \$@;'
 EOF
-    fi
+  fi
 
-    print_config_mk ARCH   "${1}" ${ARCH_LIST}
-    print_config_mk HAVE   "${1}" ${HAVE_LIST}
-    print_config_mk CONFIG "${1}" ${CONFIG_LIST}
-    print_config_mk HAVE   "${1}" gnu_strip
+  print_config_mk ARCH   "${1}" ${ARCH_LIST}
+  print_config_mk HAVE   "${1}" ${HAVE_LIST}
+  print_config_mk CONFIG "${1}" ${CONFIG_LIST}
+  print_config_mk HAVE   "${1}" gnu_strip
 
-    enabled msvs && echo "CONFIG_VS_VERSION=${vs_version}" >> "${1}"
+  enabled msvs && echo "CONFIG_VS_VERSION=${vs_version}" >> "${1}"
 
-    CC="${saved_CC}"
-    CXX="${saved_CXX}"
+  CC="${saved_CC}"
+  CXX="${saved_CXX}"
 }
 
-
 write_common_target_config_h() {
-    print_webm_license ${TMP_H} "/*" " */"
-    cat >> ${TMP_H} << EOF
+  print_webm_license ${TMP_H} "/*" " */"
+  cat >> ${TMP_H} << EOF
 /* This file automatically generated by configure. Do not edit! */
 #ifndef VPX_CONFIG_H
 #define VPX_CONFIG_H
 #define RESTRICT    ${RESTRICT}
 #define INLINE      ${INLINE}
 EOF
-    print_config_h ARCH   "${TMP_H}" ${ARCH_LIST}
-    print_config_h HAVE   "${TMP_H}" ${HAVE_LIST}
-    print_config_h CONFIG "${TMP_H}" ${CONFIG_LIST}
-    print_config_vars_h   "${TMP_H}" ${VAR_LIST}
-    echo "#endif /* VPX_CONFIG_H */" >> ${TMP_H}
-    mkdir -p `dirname "$1"`
-    cmp "$1" ${TMP_H} >/dev/null 2>&1 || mv ${TMP_H} "$1"
+  print_config_h ARCH   "${TMP_H}" ${ARCH_LIST}
+  print_config_h HAVE   "${TMP_H}" ${HAVE_LIST}
+  print_config_h CONFIG "${TMP_H}" ${CONFIG_LIST}
+  print_config_vars_h   "${TMP_H}" ${VAR_LIST}
+  echo "#endif /* VPX_CONFIG_H */" >> ${TMP_H}
+  mkdir -p `dirname "$1"`
+  cmp "$1" ${TMP_H} >/dev/null 2>&1 || mv ${TMP_H} "$1"
 }
 
 process_common_cmdline() {
-    for opt in "$@"; do
-        optval="${opt#*=}"
-        case "$opt" in
-        --child) enable_feature child
+  for opt in "$@"; do
+    optval="${opt#*=}"
+    case "$opt" in
+      --child)
+        enable_feature child
         ;;
-        --log*)
+      --log*)
         logging="$optval"
         if ! disabled logging ; then
-            enabled logging || logfile="$logging"
+          enabled logging || logfile="$logging"
         else
-            logfile=/dev/null
+          logfile=/dev/null
         fi
         ;;
-        --target=*) toolchain="${toolchain:-${optval}}"
+      --target=*)
+        toolchain="${toolchain:-${optval}}"
         ;;
-        --force-target=*) toolchain="${toolchain:-${optval}}"; enable_feature force_toolchain
+      --force-target=*)
+        toolchain="${toolchain:-${optval}}"
+        enable_feature force_toolchain
         ;;
-        --cpu)
+      --cpu)
         ;;
-        --cpu=*) tune_cpu="$optval"
+      --cpu=*)
+        tune_cpu="$optval"
         ;;
-        --extra-cflags=*)
+      --extra-cflags=*)
         extra_cflags="${optval}"
         ;;
-        --enable-?*|--disable-?*)
+      --enable-?*|--disable-?*)
         eval `echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g'`
         if echo "${ARCH_EXT_LIST}" | grep "^ *$option\$" >/dev/null; then
-            [ $action = "disable" ] && RTCD_OPTIONS="${RTCD_OPTIONS}--disable-${option} "
+          [ $action = "disable" ] && RTCD_OPTIONS="${RTCD_OPTIONS}--disable-${option} "
         elif [ $action = "disable" ] && ! disabled $option ; then
           echo "${CMDLINE_SELECT}" | grep "^ *$option\$" >/dev/null ||
             die_unknown $opt
         elif [ $action = "enable" ] && ! enabled $option ; then
           echo "${CMDLINE_SELECT}" | grep "^ *$option\$" >/dev/null ||
             die_unknown $opt
         fi
         ${action}_feature $option
         ;;
-        --require-?*)
+      --require-?*)
         eval `echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g'`
         if echo "${ARCH_EXT_LIST}" none | grep "^ *$option\$" >/dev/null; then
             RTCD_OPTIONS="${RTCD_OPTIONS}${opt} "
         else
             die_unknown $opt
         fi
         ;;
-        --force-enable-?*|--force-disable-?*)
+      --force-enable-?*|--force-disable-?*)
         eval `echo "$opt" | sed 's/--force-/action=/;s/-/ option=/;s/-/_/g'`
         ${action}_feature $option
         ;;
-        --libc=*)
+      --libc=*)
         [ -d "${optval}" ] || die "Not a directory: ${optval}"
         disable_feature builtin_libc
         alt_libc="${optval}"
         ;;
-        --as=*)
+      --as=*)
         [ "${optval}" = yasm ] || [ "${optval}" = nasm ] \
-            || [ "${optval}" = auto ] \
-            || die "Must be yasm, nasm or auto: ${optval}"
+          || [ "${optval}" = auto ] \
+          || die "Must be yasm, nasm or auto: ${optval}"
         alt_as="${optval}"
         ;;
-        --size-limit=*)
+      --size-limit=*)
         w="${optval%%x*}"
         h="${optval##*x}"
         VAR_LIST="DECODE_WIDTH_LIMIT ${w} DECODE_HEIGHT_LIMIT ${h}"
         [ ${w} -gt 0 ] && [ ${h} -gt 0 ] || die "Invalid size-limit: too small."
         [ ${w} -lt 65536 ] && [ ${h} -lt 65536 ] \
             || die "Invalid size-limit: too big."
         enable_feature size_limit
         ;;
-        --prefix=*)
+      --prefix=*)
         prefix="${optval}"
         ;;
-        --libdir=*)
+      --libdir=*)
         libdir="${optval}"
         ;;
-        --sdk-path=*)
+      --sdk-path=*)
         [ -d "${optval}" ] || die "Not a directory: ${optval}"
         sdk_path="${optval}"
         ;;
-        --libc|--as|--prefix|--libdir|--sdk-path)
+      --libc|--as|--prefix|--libdir|--sdk-path)
         die "Option ${opt} requires argument"
         ;;
-        --help|-h) show_help
-        ;;
-        *) die_unknown $opt
-        ;;
-        esac
-    done
+      --help|-h)
+        show_help
+        ;;
+      *)
+        die_unknown $opt
+        ;;
+    esac
+  done
 }
 
 process_cmdline() {
-    for opt do
-        optval="${opt#*=}"
-        case "$opt" in
-        *) process_common_cmdline $opt
-        ;;
-        esac
-    done
+  for opt do
+    optval="${opt#*=}"
+    case "$opt" in
+      *)
+        process_common_cmdline $opt
+        ;;
+    esac
+  done
 }
 
-
 post_process_common_cmdline() {
-    prefix="${prefix:-/usr/local}"
-    prefix="${prefix%/}"
-    libdir="${libdir:-${prefix}/lib}"
-    libdir="${libdir%/}"
-    if [ "${libdir#${prefix}}" = "${libdir}" ]; then
-        die "Libdir ${libdir} must be a subdirectory of ${prefix}"
+  prefix="${prefix:-/usr/local}"
+  prefix="${prefix%/}"
+  libdir="${libdir:-${prefix}/lib}"
+  libdir="${libdir%/}"
+  if [ "${libdir#${prefix}}" = "${libdir}" ]; then
+    die "Libdir ${libdir} must be a subdirectory of ${prefix}"
+  fi
+}
+
+post_process_cmdline() {
+  true;
+}
+
+setup_gnu_toolchain() {
+  CC=${CC:-${CROSS}gcc}
+  CXX=${CXX:-${CROSS}g++}
+  AR=${AR:-${CROSS}ar}
+  LD=${LD:-${CROSS}${link_with_cc:-ld}}
+  AS=${AS:-${CROSS}as}
+  STRIP=${STRIP:-${CROSS}strip}
+  NM=${NM:-${CROSS}nm}
+  AS_SFX=.s
+  EXE_SFX=
+}
+
+process_common_toolchain() {
+  if [ -z "$toolchain" ]; then
+    gcctarget="${CHOST:-$(gcc -dumpmachine 2> /dev/null)}"
+
+    # detect tgt_isa
+    case "$gcctarget" in
+      armv6*)
+        tgt_isa=armv6
+        ;;
+      armv7*-hardfloat*)
+        tgt_isa=armv7
+        float_abi=hard
+        ;;
+      armv7*)
+        tgt_isa=armv7
+        float_abi=softfp
+        ;;
+      *x86_64*|*amd64*)
+        tgt_isa=x86_64
+        ;;
+      *i[3456]86*)
+        tgt_isa=x86
+        ;;
+      *powerpc64*)
+        tgt_isa=ppc64
+        ;;
+      *powerpc*)
+        tgt_isa=ppc32
+        ;;
+      *sparc*)
+        tgt_isa=sparc
+        ;;
+    esac
+
+    # detect tgt_os
+    case "$gcctarget" in
+      *darwin8*)
+        tgt_isa=universal
+        tgt_os=darwin8
+        ;;
+      *darwin9*)
+        tgt_isa=universal
+        tgt_os=darwin9
+        ;;
+      *darwin10*)
+        tgt_isa=x86_64
+        tgt_os=darwin10
+        ;;
+      *darwin11*)
+        tgt_isa=x86_64
+        tgt_os=darwin11
+        ;;
+      *darwin12*)
+        tgt_isa=x86_64
+        tgt_os=darwin12
+        ;;
+      *darwin13*)
+        tgt_isa=x86_64
+        tgt_os=darwin13
+        ;;
+      x86_64*mingw32*)
+        tgt_os=win64
+        ;;
+      *mingw32*|*cygwin*)
+        [ -z "$tgt_isa" ] && tgt_isa=x86
+        tgt_os=win32
+        ;;
+      *linux*|*bsd*)
+        tgt_os=linux
+        ;;
+      *solaris2.10)
+        tgt_os=solaris
+        ;;
+      *os2*)
+        tgt_os=os2
+        ;;
+    esac
+
+    if [ -n "$tgt_isa" ] && [ -n "$tgt_os" ]; then
+      toolchain=${tgt_isa}-${tgt_os}-gcc
     fi
-}
-
-
-post_process_cmdline() {
-    true;
-}
-
-setup_gnu_toolchain() {
-        CC=${CC:-${CROSS}gcc}
-        CXX=${CXX:-${CROSS}g++}
-        AR=${AR:-${CROSS}ar}
-        LD=${LD:-${CROSS}${link_with_cc:-ld}}
-        AS=${AS:-${CROSS}as}
-    STRIP=${STRIP:-${CROSS}strip}
-    NM=${NM:-${CROSS}nm}
-        AS_SFX=.s
-        EXE_SFX=
-}
-
-process_common_toolchain() {
-    if [ -z "$toolchain" ]; then
-        gcctarget="${CHOST:-$(gcc -dumpmachine 2> /dev/null)}"
-
-        # detect tgt_isa
-        case "$gcctarget" in
-            armv6*)
-                tgt_isa=armv6
-                ;;
-            armv7*-hardfloat*)
-                tgt_isa=armv7
-                float_abi=hard
-                ;;
-            armv7*)
-                tgt_isa=armv7
-                float_abi=softfp
-                ;;
-            armv5te*)
-                tgt_isa=armv5te
-                ;;
-            *x86_64*|*amd64*)
-                tgt_isa=x86_64
-                ;;
-            *i[3456]86*)
-                tgt_isa=x86
-                ;;
-            *powerpc64*)
-                tgt_isa=ppc64
-                ;;
-            *powerpc*)
-                tgt_isa=ppc32
-                ;;
-            *sparc*)
-                tgt_isa=sparc
-                ;;
-        esac
-
-        # detect tgt_os
-        case "$gcctarget" in
-            *darwin8*)
-                tgt_isa=universal
-                tgt_os=darwin8
-                ;;
-            *darwin9*)
-                tgt_isa=universal
-                tgt_os=darwin9
-                ;;
-            *darwin10*)
-                tgt_isa=x86_64
-                tgt_os=darwin10
-                ;;
-            *darwin11*)
-                tgt_isa=x86_64
-                tgt_os=darwin11
-                ;;
-            *darwin12*)
-                tgt_isa=x86_64
-                tgt_os=darwin12
-                ;;
-            *darwin13*)
-                tgt_isa=x86_64
-                tgt_os=darwin13
-                ;;
-            x86_64*mingw32*)
-                tgt_os=win64
-                ;;
-            *mingw32*|*cygwin*)
-                [ -z "$tgt_isa" ] && tgt_isa=x86
-                tgt_os=win32
-                ;;
-            *linux*|*bsd*)
-                tgt_os=linux
-                ;;
-            *solaris2.10)
-                tgt_os=solaris
-                ;;
-            *os2*)
-                tgt_os=os2
-                ;;
-        esac
-
-        if [ -n "$tgt_isa" ] && [ -n "$tgt_os" ]; then
-            toolchain=${tgt_isa}-${tgt_os}-gcc
-        fi
-    fi
-
-    toolchain=${toolchain:-generic-gnu}
-
-    is_in ${toolchain} ${all_platforms} || enabled force_toolchain \
-        || die "Unrecognized toolchain '${toolchain}'"
-
-    enabled child || log_echo "Configuring for target '${toolchain}'"
-
-    #
-    # Set up toolchain variables
-    #
-    tgt_isa=$(echo ${toolchain} | awk 'BEGIN{FS="-"}{print $1}')
-    tgt_os=$(echo ${toolchain} | awk 'BEGIN{FS="-"}{print $2}')
-    tgt_cc=$(echo ${toolchain} | awk 'BEGIN{FS="-"}{print $3}')
-
-    # Mark the specific ISA requested as enabled
-    soft_enable ${tgt_isa}
-    enable_feature ${tgt_os}
-    enable_feature ${tgt_cc}
-
-    # Enable the architecture family
-    case ${tgt_isa} in
-        arm*) enable_feature arm;;
-        mips*) enable_feature mips;;
-    esac
-
-    # PIC is probably what we want when building shared libs
-    enabled shared && soft_enable pic
-
-    # Minimum iOS version for all target platforms (darwin and iphonesimulator).
-    IOS_VERSION_MIN="6.0"
-
-    # Handle darwin variants. Newer SDKs allow targeting older
-    # platforms, so find the newest SDK available.
-    case ${toolchain} in
-        *-darwin*)
-            if [ -z "${DEVELOPER_DIR}" ]; then
-                DEVELOPER_DIR=`xcode-select -print-path 2> /dev/null`
-                [ $? -ne 0 ] && OSX_SKIP_DIR_CHECK=1
-            fi
-            if [ -z "${OSX_SKIP_DIR_CHECK}" ]; then
-                OSX_SDK_ROOTS="${DEVELOPER_DIR}/SDKs"
-                OSX_SDK_VERSIONS="MacOSX10.4u.sdk MacOSX10.5.sdk MacOSX10.6.sdk"
-                OSX_SDK_VERSIONS="${OSX_SDK_VERSIONS} MacOSX10.7.sdk"
-                for v in ${OSX_SDK_VERSIONS}; do
-                    if [ -d "${OSX_SDK_ROOTS}/${v}" ]; then
-                        osx_sdk_dir="${OSX_SDK_ROOTS}/${v}"
-                    fi
-                done
-            fi
-            ;;
-    esac
-
-    if [ -d "${osx_sdk_dir}" ]; then
-        add_cflags  "-isysroot ${osx_sdk_dir}"
-        add_ldflags "-isysroot ${osx_sdk_dir}"
-    fi
-
-    case ${toolchain} in
-        *-darwin8-*)
-            add_cflags  "-mmacosx-version-min=10.4"
-            add_ldflags "-mmacosx-version-min=10.4"
-            ;;
-        *-darwin9-*)
-            add_cflags  "-mmacosx-version-min=10.5"
-            add_ldflags "-mmacosx-version-min=10.5"
-            ;;
-        *-darwin10-*)
-            add_cflags  "-mmacosx-version-min=10.6"
-            add_ldflags "-mmacosx-version-min=10.6"
-            ;;
-        *-darwin11-*)
-            add_cflags  "-mmacosx-version-min=10.7"
-            add_ldflags "-mmacosx-version-min=10.7"
-            ;;
-        *-darwin12-*)
-            add_cflags  "-mmacosx-version-min=10.8"
-            add_ldflags "-mmacosx-version-min=10.8"
-            ;;
-        *-darwin13-*)
-            add_cflags  "-mmacosx-version-min=10.9"
-            add_ldflags "-mmacosx-version-min=10.9"
-            ;;
-        *-iphonesimulator-*)
-            add_cflags  "-miphoneos-version-min=${IOS_VERSION_MIN}"
-            add_ldflags "-miphoneos-version-min=${IOS_VERSION_MIN}"
-            osx_sdk_dir="$(xcrun --sdk iphonesimulator --show-sdk-path)"
-            add_cflags  "-isysroot ${osx_sdk_dir}"
-            add_ldflags "-isysroot ${osx_sdk_dir}"
-            ;;
-    esac
-
-    # Handle Solaris variants. Solaris 10 needs -lposix4
-    case ${toolchain} in
-        sparc-solaris-*)
-            add_extralibs -lposix4
-            disable_feature fast_unaligned
-            ;;
-        *-solaris-*)
-            add_extralibs -lposix4
-            ;;
-    esac
-
-    # Process ARM architecture variants
-    case ${toolchain} in
+  fi
+
+  toolchain=${toolchain:-generic-gnu}
+
+  is_in ${toolchain} ${all_platforms} || enabled force_toolchain \
+    || die "Unrecognized toolchain '${toolchain}'"
+
+  enabled child || log_echo "Configuring for target '${toolchain}'"
+
+  #
+  # Set up toolchain variables
+  #
+  tgt_isa=$(echo ${toolchain} | awk 'BEGIN{FS="-"}{print $1}')
+  tgt_os=$(echo ${toolchain} | awk 'BEGIN{FS="-"}{print $2}')
+  tgt_cc=$(echo ${toolchain} | awk 'BEGIN{FS="-"}{print $3}')
+
+  # Mark the specific ISA requested as enabled
+  soft_enable ${tgt_isa}
+  enable_feature ${tgt_os}
+  enable_feature ${tgt_cc}
+
+  # Enable the architecture family
+  case ${tgt_isa} in
     arm*)
-        # on arm, isa versions are supersets
-        case ${tgt_isa} in
+      enable_feature arm
+      ;;
+    mips*)
+      enable_feature mips
+      ;;
+  esac
+
+  # PIC is probably what we want when building shared libs
+  enabled shared && soft_enable pic
+
+  # Minimum iOS version for all target platforms (darwin and iphonesimulator).
+  IOS_VERSION_MIN="6.0"
+
+  # Handle darwin variants. Newer SDKs allow targeting older
+  # platforms, so find the newest SDK available.
+  case ${toolchain} in
+    *-darwin*)
+      if [ -z "${DEVELOPER_DIR}" ]; then
+        DEVELOPER_DIR=`xcode-select -print-path 2> /dev/null`
+        [ $? -ne 0 ] && OSX_SKIP_DIR_CHECK=1
+      fi
+      if [ -z "${OSX_SKIP_DIR_CHECK}" ]; then
+        OSX_SDK_ROOTS="${DEVELOPER_DIR}/SDKs"
+        OSX_SDK_VERSIONS="MacOSX10.4u.sdk MacOSX10.5.sdk MacOSX10.6.sdk"
+        OSX_SDK_VERSIONS="${OSX_SDK_VERSIONS} MacOSX10.7.sdk"
+        for v in ${OSX_SDK_VERSIONS}; do
+          if [ -d "${OSX_SDK_ROOTS}/${v}" ]; then
+            osx_sdk_dir="${OSX_SDK_ROOTS}/${v}"
+          fi
+        done
+      fi
+      ;;
+  esac
+
+  if [ -d "${osx_sdk_dir}" ]; then
+    add_cflags  "-isysroot ${osx_sdk_dir}"
+    add_ldflags "-isysroot ${osx_sdk_dir}"
+  fi
+
+  case ${toolchain} in
+    *-darwin8-*)
+      add_cflags  "-mmacosx-version-min=10.4"
+      add_ldflags "-mmacosx-version-min=10.4"
+      ;;
+    *-darwin9-*)
+      add_cflags  "-mmacosx-version-min=10.5"
+      add_ldflags "-mmacosx-version-min=10.5"
+      ;;
+    *-darwin10-*)
+      add_cflags  "-mmacosx-version-min=10.6"
+      add_ldflags "-mmacosx-version-min=10.6"
+      ;;
+    *-darwin11-*)
+      add_cflags  "-mmacosx-version-min=10.7"
+      add_ldflags "-mmacosx-version-min=10.7"
+      ;;
+    *-darwin12-*)
+      add_cflags  "-mmacosx-version-min=10.8"
+      add_ldflags "-mmacosx-version-min=10.8"
+      ;;
+    *-darwin13-*)
+      add_cflags  "-mmacosx-version-min=10.9"
+      add_ldflags "-mmacosx-version-min=10.9"
+      ;;
+    *-iphonesimulator-*)
+      add_cflags  "-miphoneos-version-min=${IOS_VERSION_MIN}"
+      add_ldflags "-miphoneos-version-min=${IOS_VERSION_MIN}"
+      osx_sdk_dir="$(xcrun --sdk iphonesimulator --show-sdk-path)"
+      add_cflags  "-isysroot ${osx_sdk_dir}"
+      add_ldflags "-isysroot ${osx_sdk_dir}"
+      ;;
+  esac
+
+  # Handle Solaris variants. Solaris 10 needs -lposix4
+  case ${toolchain} in
+    sparc-solaris-*)
+      add_extralibs -lposix4
+      disable_feature fast_unaligned
+      ;;
+    *-solaris-*)
+      add_extralibs -lposix4
+      ;;
+  esac
+
+  # Process ARM architecture variants
+  case ${toolchain} in
+    arm*)
+      # on arm, isa versions are supersets
+      case ${tgt_isa} in
         arm64|armv8)
-            soft_enable neon
-            ;;
+          soft_enable neon
+          ;;
         armv7|armv7s)
-            soft_enable neon
-            soft_enable neon_asm
-            soft_enable media
-            soft_enable edsp
-            soft_enable fast_unaligned
-            ;;
+          soft_enable neon
+          soft_enable neon_asm
+          soft_enable media
+          soft_enable fast_unaligned
+          ;;
         armv6)
-            soft_enable media
-            soft_enable edsp
-            soft_enable fast_unaligned
-            ;;
-        armv5te)
-            soft_enable edsp
-            disable_feature fast_unaligned
-            ;;
-        esac
-
-        asm_conversion_cmd="cat"
-
-        case ${tgt_cc} in
+          soft_enable media
+          soft_enable fast_unaligned
+          ;;
+      esac
+
+      asm_conversion_cmd="cat"
+
+      case ${tgt_cc} in
         gcc)
-            CROSS=${CROSS:-arm-none-linux-gnueabi-}
-            link_with_cc=gcc
-            setup_gnu_toolchain
-            arch_int=${tgt_isa##armv}
-            arch_int=${arch_int%%te}
-            check_add_asflags --defsym ARCHITECTURE=${arch_int}
-            tune_cflags="-mtune="
-            if [ ${tgt_isa} = "armv7" ] || [ ${tgt_isa} = "armv7s" ]; then
-                if [ -z "${float_abi}" ]; then
-                    check_cpp <<EOF && float_abi=hard || float_abi=softfp
+          CROSS=${CROSS:-arm-none-linux-gnueabi-}
+          link_with_cc=gcc
+          setup_gnu_toolchain
+          arch_int=${tgt_isa##armv}
+          arch_int=${arch_int%%te}
+          check_add_asflags --defsym ARCHITECTURE=${arch_int}
+          tune_cflags="-mtune="
+          if [ ${tgt_isa} = "armv7" ] || [ ${tgt_isa} = "armv7s" ]; then
+            if [ -z "${float_abi}" ]; then
+              check_cpp <<EOF && float_abi=hard || float_abi=softfp
 #ifndef __ARM_PCS_VFP
 #error "not hardfp"
 #endif
 EOF
-                fi
-                check_add_cflags  -march=armv7-a -mfloat-abi=${float_abi}
-                check_add_asflags -march=armv7-a -mfloat-abi=${float_abi}
-
-                if enabled neon || enabled neon_asm
-                then
-                    check_add_cflags -mfpu=neon #-ftree-vectorize
-                    check_add_asflags -mfpu=neon
-                fi
-
-                if [ -z "${tune_cpu}" ]; then
-                    tune_cpu=cortex-a8
-                fi
+            fi
+            check_add_cflags  -march=armv7-a -mfloat-abi=${float_abi}
+            check_add_asflags -march=armv7-a -mfloat-abi=${float_abi}
+
+            if enabled neon || enabled neon_asm; then
+              check_add_cflags -mfpu=neon #-ftree-vectorize
+              check_add_asflags -mfpu=neon
+            fi
+
+            if [ -z "${tune_cpu}" ]; then
+              tune_cpu=cortex-a8
+            fi
+          else
+            check_add_cflags -march=${tgt_isa}
+            check_add_asflags -march=${tgt_isa}
+          fi
+
+          enabled debug && add_asflags -g
+          asm_conversion_cmd="${source_path}/build/make/ads2gas.pl"
+          if enabled thumb; then
+            asm_conversion_cmd="$asm_conversion_cmd -thumb"
+            check_add_cflags -mthumb
+            check_add_asflags -mthumb -mimplicit-it=always
+          fi
+          ;;
+        vs*)
+          asm_conversion_cmd="${source_path}/build/make/ads2armasm_ms.pl"
+          AS_SFX=.s
+          msvs_arch_dir=arm-msvs
+          disable_feature multithread
+          disable_feature unit_tests
+          vs_version=${tgt_cc##vs}
+          if [ $vs_version -ge 12 ]; then
+            # MSVC 2013 doesn't allow doing plain .exe projects for ARM,
+            # only "AppContainerApplication" which requires an AppxManifest.
+            # Therefore disable the examples, just build the library.
+            disable_feature examples
+          fi
+          ;;
+        rvct)
+          CC=armcc
+          AR=armar
+          AS=armasm
+          LD="${source_path}/build/make/armlink_adapter.sh"
+          STRIP=arm-none-linux-gnueabi-strip
+          NM=arm-none-linux-gnueabi-nm
+          tune_cflags="--cpu="
+          tune_asflags="--cpu="
+          if [ -z "${tune_cpu}" ]; then
+            if [ ${tgt_isa} = "armv7" ]; then
+              if enabled neon || enabled neon_asm
+              then
+                check_add_cflags --fpu=softvfp+vfpv3
+                check_add_asflags --fpu=softvfp+vfpv3
+              fi
+              check_add_cflags --cpu=Cortex-A8
+              check_add_asflags --cpu=Cortex-A8
             else
-                check_add_cflags -march=${tgt_isa}
-                check_add_asflags -march=${tgt_isa}
+              check_add_cflags --cpu=${tgt_isa##armv}
+              check_add_asflags --cpu=${tgt_isa##armv}
             fi
-
-            enabled debug && add_asflags -g
-            asm_conversion_cmd="${source_path}/build/make/ads2gas.pl"
-            if enabled thumb; then
-                asm_conversion_cmd="$asm_conversion_cmd -thumb"
-                check_add_cflags -mthumb
-                check_add_asflags -mthumb -mimplicit-it=always
-            fi
-            ;;
+          fi
+          arch_int=${tgt_isa##armv}
+          arch_int=${arch_int%%te}
+          check_add_asflags --pd "\"ARCHITECTURE SETA ${arch_int}\""
+          enabled debug && add_asflags -g
+          add_cflags --gnu
+          add_cflags --enum_is_int
+          add_cflags --wchar32
+          ;;
+      esac
+
+      case ${tgt_os} in
+        none*)
+          disable_feature multithread
+          disable_feature os_support
+          ;;
+
+        android*)
+          SDK_PATH=${sdk_path}
+          COMPILER_LOCATION=`find "${SDK_PATH}" \
+                             -name "arm-linux-androideabi-gcc*" -print -quit`
+          TOOLCHAIN_PATH=${COMPILER_LOCATION%/*}/arm-linux-androideabi-
+          CC=${TOOLCHAIN_PATH}gcc
+          CXX=${TOOLCHAIN_PATH}g++
+          AR=${TOOLCHAIN_PATH}ar
+          LD=${TOOLCHAIN_PATH}gcc
+          AS=${TOOLCHAIN_PATH}as
+          STRIP=${TOOLCHAIN_PATH}strip
+          NM=${TOOLCHAIN_PATH}nm
+
+          if [ -z "${alt_libc}" ]; then
+            alt_libc=`find "${SDK_PATH}" -name arch-arm -print | \
+              awk '{n = split($0,a,"/"); \
+                split(a[n-1],b,"-"); \
+                print $0 " " b[2]}' | \
+                sort -g -k 2 | \
+                awk '{ print $1 }' | tail -1`
+          fi
+
+          add_cflags "--sysroot=${alt_libc}"
+          add_ldflags "--sysroot=${alt_libc}"
+
+          # linker flag that routes around a CPU bug in some
+          # Cortex-A8 implementations (NDK Dev Guide)
+          add_ldflags "-Wl,--fix-cortex-a8"
+
+          enable_feature pic
+          soft_enable realtime_only
+          if [ ${tgt_isa} = "armv7" ]; then
+            soft_enable runtime_cpu_detect
+          fi
+          if enabled runtime_cpu_detect; then
+            add_cflags "-I${SDK_PATH}/sources/android/cpufeatures"
+          fi
+          ;;
+
+        darwin*)
+          XCRUN_FIND="xcrun --sdk iphoneos -find"
+          CXX="$(${XCRUN_FIND} clang++)"
+          CC="$(${XCRUN_FIND} clang)"
+          AR="$(${XCRUN_FIND} ar)"
+          AS="$(${XCRUN_FIND} as)"
+          STRIP="$(${XCRUN_FIND} strip)"
+          NM="$(${XCRUN_FIND} nm)"
+          RANLIB="$(${XCRUN_FIND} ranlib)"
+          AS_SFX=.s
+
+          # Special handling of ld for armv6 because libclang_rt.ios.a does
+          # not contain armv6 support in Apple's clang package:
+          #   Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn).
+          # TODO(tomfinegan): Remove this. Our minimum iOS version (6.0)
+          # renders support for armv6 unnecessary because the 3GS and up
+          # support neon.
+          if [ "${tgt_isa}" = "armv6" ]; then
+            LD="$(${XCRUN_FIND} ld)"
+          else
+            LD="${CXX:-$(${XCRUN_FIND} ld)}"
+          fi
+
+          # ASFLAGS is written here instead of using check_add_asflags
+          # because we need to overwrite all of ASFLAGS and purge the
+          # options that were put in above
+          ASFLAGS="-arch ${tgt_isa} -g"
+
+          alt_libc="$(xcrun --sdk iphoneos --show-sdk-path)"
+          add_cflags -arch ${tgt_isa} -isysroot ${alt_libc}
+          add_ldflags -arch ${tgt_isa}
+
+          if [ "${LD}" = "${CXX}" ]; then
+            add_ldflags -miphoneos-version-min="${IOS_VERSION_MIN}"
+          else
+            add_ldflags -ios_version_min "${IOS_VERSION_MIN}"
+          fi
+
+          for d in lib usr/lib usr/lib/system; do
+            try_dir="${alt_libc}/${d}"
+            [ -d "${try_dir}" ] && add_ldflags -L"${try_dir}"
+          done
+
+          asm_conversion_cmd="${source_path}/build/make/ads2gas_apple.pl"
+          ;;
+
+        linux*)
+          enable_feature linux
+          if enabled rvct; then
+            # Check if we have CodeSourcery GCC in PATH. Needed for
+            # libraries
+            hash arm-none-linux-gnueabi-gcc 2>&- || \
+              die "Couldn't find CodeSourcery GCC from PATH"
+
+            # Use armcc as a linker to enable translation of
+            # some gcc specific options such as -lm and -lpthread.
+            LD="armcc --translate_gcc"
+
+            # create configuration file (uses path to CodeSourcery GCC)
+            armcc --arm_linux_configure --arm_linux_config_file=arm_linux.cfg
+
+            add_cflags --arm_linux_paths --arm_linux_config_file=arm_linux.cfg
+            add_asflags --no_hide_all --apcs=/interwork
+            add_ldflags --arm_linux_paths --arm_linux_config_file=arm_linux.cfg
+            enabled pic && add_cflags --apcs=/fpic
+            enabled pic && add_asflags --apcs=/fpic
+            enabled shared && add_cflags --shared
+          fi
+          ;;
+      esac
+      ;;
+    mips*)
+      link_with_cc=gcc
+      setup_gnu_toolchain
+      tune_cflags="-mtune="
+      if enabled dspr2; then
+        check_add_cflags -mips32r2 -mdspr2
+        disable_feature fast_unaligned
+      fi
+      check_add_cflags -march=${tgt_isa}
+      check_add_asflags -march=${tgt_isa}
+      check_add_asflags -KPIC
+      ;;
+    ppc*)
+      enable_feature ppc
+      bits=${tgt_isa##ppc}
+      link_with_cc=gcc
+      setup_gnu_toolchain
+      add_asflags -force_cpusubtype_ALL -I"\$(dir \$<)darwin"
+      soft_enable altivec
+      enabled altivec && add_cflags -maltivec
+
+      case "$tgt_os" in
+        linux*)
+          add_asflags -maltivec -mregnames -I"\$(dir \$<)linux"
+          ;;
+        darwin*)
+          darwin_arch="-arch ppc"
+          enabled ppc64 && darwin_arch="${darwin_arch}64"
+          add_cflags  ${darwin_arch} -m${bits} -fasm-blocks
+          add_asflags ${darwin_arch} -force_cpusubtype_ALL -I"\$(dir \$<)darwin"
+          add_ldflags ${darwin_arch} -m${bits}
+          enabled altivec && add_cflags -faltivec
+          ;;
+      esac
+      ;;
+    x86*)
+      case  ${tgt_os} in
+        win*)
+          enabled gcc && add_cflags -fno-common
+          ;;
+        solaris*)
+          CC=${CC:-${CROSS}gcc}
+          CXX=${CXX:-${CROSS}g++}
+          LD=${LD:-${CROSS}gcc}
+          CROSS=${CROSS:-g}
+          ;;
+        os2)
+          AS=${AS:-nasm}
+          ;;
+      esac
+
+      AS="${alt_as:-${AS:-auto}}"
+      case  ${tgt_cc} in
+        icc*)
+          CC=${CC:-icc}
+          LD=${LD:-icc}
+          setup_gnu_toolchain
+          add_cflags -use-msasm  # remove -use-msasm too?
+          # add -no-intel-extensions to suppress warning #10237
+          # refer to http://software.intel.com/en-us/forums/topic/280199
+          add_ldflags -i-static -no-intel-extensions
+          enabled x86_64 && add_cflags -ipo -static -O3 -no-prec-div
+          enabled x86_64 && AR=xiar
+          case ${tune_cpu} in
+            atom*)
+              tune_cflags="-x"
+              tune_cpu="SSE3_ATOM"
+              ;;
+            *)
+              tune_cflags="-march="
+              ;;
+          esac
+          ;;
+        gcc*)
+          link_with_cc=gcc
+          tune_cflags="-march="
+          setup_gnu_toolchain
+          #for 32 bit x86 builds, -O3 did not turn on this flag
+          enabled optimizations && disabled gprof && check_add_cflags -fomit-frame-pointer
+          ;;
         vs*)
-            asm_conversion_cmd="${source_path}/build/make/ads2armasm_ms.pl"
-            AS_SFX=.s
-            msvs_arch_dir=arm-msvs
-            disable_feature multithread
-            disable_feature unit_tests
-            vs_version=${tgt_cc##vs}
-            if [ $vs_version -ge 12 ]; then
-                # MSVC 2013 doesn't allow doing plain .exe projects for ARM,
-                # only "AppContainerApplication" which requires an AppxManifest.
-                # Therefore disable the examples, just build the library.
-                disable_feature examples
-            fi
-            ;;
-        rvct)
-            CC=armcc
-            AR=armar
-            AS=armasm
-            LD="${source_path}/build/make/armlink_adapter.sh"
-            STRIP=arm-none-linux-gnueabi-strip
-            NM=arm-none-linux-gnueabi-nm
-            tune_cflags="--cpu="
-            tune_asflags="--cpu="
-            if [ -z "${tune_cpu}" ]; then
-                if [ ${tgt_isa} = "armv7" ]; then
-                    if enabled neon || enabled neon_asm
-                    then
-                        check_add_cflags --fpu=softvfp+vfpv3
-                        check_add_asflags --fpu=softvfp+vfpv3
-                    fi
-                    check_add_cflags --cpu=Cortex-A8
-                    check_add_asflags --cpu=Cortex-A8
-                else
-                    check_add_cflags --cpu=${tgt_isa##armv}
-                    check_add_asflags --cpu=${tgt_isa##armv}
-                fi
-            fi
-            arch_int=${tgt_isa##armv}
-            arch_int=${arch_int%%te}
-            check_add_asflags --pd "\"ARCHITECTURE SETA ${arch_int}\""
-            enabled debug && add_asflags -g
-            add_cflags --gnu
-            add_cflags --enum_is_int
-            add_cflags --wchar32
-        ;;
-        esac
-
-        case ${tgt_os} in
-        none*)
-            disable_feature multithread
-            disable_feature os_support
-            ;;
-
-        android*)
-            SDK_PATH=${sdk_path}
-            COMPILER_LOCATION=`find "${SDK_PATH}" \
-                               -name "arm-linux-androideabi-gcc*" -print -quit`
-            TOOLCHAIN_PATH=${COMPILER_LOCATION%/*}/arm-linux-androideabi-
-            CC=${TOOLCHAIN_PATH}gcc
-            CXX=${TOOLCHAIN_PATH}g++
-            AR=${TOOLCHAIN_PATH}ar
-            LD=${TOOLCHAIN_PATH}gcc
-            AS=${TOOLCHAIN_PATH}as
-            STRIP=${TOOLCHAIN_PATH}strip
-            NM=${TOOLCHAIN_PATH}nm
-
-            if [ -z "${alt_libc}" ]; then
-                alt_libc=`find "${SDK_PATH}" -name arch-arm -print | \
-                          awk '{n = split($0,a,"/"); \
-                                split(a[n-1],b,"-"); \
-                                print $0 " " b[2]}' | \
-                          sort -g -k 2 | \
-                          awk '{ print $1 }' | tail -1`
-            fi
-
-            add_cflags "--sysroot=${alt_libc}"
-            add_ldflags "--sysroot=${alt_libc}"
-
-            # linker flag that routes around a CPU bug in some
-            # Cortex-A8 implementations (NDK Dev Guide)
-            add_ldflags "-Wl,--fix-cortex-a8"
-
-            enable_feature pic
-            soft_enable realtime_only
-            if [ ${tgt_isa} = "armv7" ]; then
-                soft_enable runtime_cpu_detect
-            fi
-            if enabled runtime_cpu_detect; then
-                add_cflags "-I${SDK_PATH}/sources/android/cpufeatures"
-            fi
-          ;;
-
-        darwin*)
-            XCRUN_FIND="xcrun --sdk iphoneos -find"
-            CXX="$(${XCRUN_FIND} clang++)"
-            CC="$(${XCRUN_FIND} clang)"
-            AR="$(${XCRUN_FIND} ar)"
-            AS="$(${XCRUN_FIND} as)"
-            STRIP="$(${XCRUN_FIND} strip)"
-            NM="$(${XCRUN_FIND} nm)"
-            RANLIB="$(${XCRUN_FIND} ranlib)"
-            AS_SFX=.s
-
-            # Special handling of ld for armv6 because libclang_rt.ios.a does
-            # not contain armv6 support in Apple's clang package:
-            #   Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn).
-            # TODO(tomfinegan): Remove this. Our minimum iOS version (6.0)
-            # renders support for armv6 unnecessary because the 3GS and up
-            # support neon.
-            if [ "${tgt_isa}" = "armv6" ]; then
-                LD="$(${XCRUN_FIND} ld)"
-            else
-                LD="${CXX:-$(${XCRUN_FIND} ld)}"
-            fi
-
-            # ASFLAGS is written here instead of using check_add_asflags
-            # because we need to overwrite all of ASFLAGS and purge the
-            # options that were put in above
-            ASFLAGS="-arch ${tgt_isa} -g"
-
-            alt_libc="$(xcrun --sdk iphoneos --show-sdk-path)"
-            add_cflags -arch ${tgt_isa} -isysroot ${alt_libc}
-            add_ldflags -arch ${tgt_isa}
-
-            if [ "${LD}" = "${CXX}" ]; then
-                add_ldflags -miphoneos-version-min="${IOS_VERSION_MIN}"
-            else
-                add_ldflags -ios_version_min "${IOS_VERSION_MIN}"
-            fi
-
-            for d in lib usr/lib usr/lib/system; do
-                try_dir="${alt_libc}/${d}"
-                [ -d "${try_dir}" ] && add_ldflags -L"${try_dir}"
-            done
-
-            asm_conversion_cmd="${source_path}/build/make/ads2gas_apple.pl"
-         ;;
-
-        linux*)
-            enable_feature linux
-            if enabled rvct; then
-                # Check if we have CodeSourcery GCC in PATH. Needed for
-                # libraries
-                hash arm-none-linux-gnueabi-gcc 2>&- || \
-                  die "Couldn't find CodeSourcery GCC from PATH"
-
-                # Use armcc as a linker to enable translation of
-                # some gcc specific options such as -lm and -lpthread.
-                LD="armcc --translate_gcc"
-
-                # create configuration file (uses path to CodeSourcery GCC)
-                armcc --arm_linux_configure --arm_linux_config_file=arm_linux.cfg
-
-                add_cflags --arm_linux_paths --arm_linux_config_file=arm_linux.cfg
-                add_asflags --no_hide_all --apcs=/interwork
-                add_ldflags --arm_linux_paths --arm_linux_config_file=arm_linux.cfg
-                enabled pic && add_cflags --apcs=/fpic
-                enabled pic && add_asflags --apcs=/fpic
-                enabled shared && add_cflags --shared
-            fi
-        ;;
-
-        esac
-    ;;
-    mips*)
-        link_with_cc=gcc
-        setup_gnu_toolchain
-        tune_cflags="-mtune="
-        if enabled dspr2; then
-            check_add_cflags -mips32r2 -mdspr2
-            disable_feature fast_unaligned
-        fi
-        check_add_cflags -march=${tgt_isa}
-        check_add_asflags -march=${tgt_isa}
-        check_add_asflags -KPIC
-    ;;
-    ppc*)
-        enable_feature ppc
-        bits=${tgt_isa##ppc}
-        link_with_cc=gcc
-        setup_gnu_toolchain
-        add_asflags -force_cpusubtype_ALL -I"\$(dir \$<)darwin"
-        soft_enable altivec
-        enabled altivec && add_cflags -maltivec
-
-        case "$tgt_os" in
-        linux*)
-            add_asflags -maltivec -mregnames -I"\$(dir \$<)linux"
-        ;;
-        darwin*)
-            darwin_arch="-arch ppc"
-            enabled ppc64 && darwin_arch="${darwin_arch}64"
-            add_cflags  ${darwin_arch} -m${bits} -fasm-blocks
-            add_asflags ${darwin_arch} -force_cpusubtype_ALL -I"\$(dir \$<)darwin"
-            add_ldflags ${darwin_arch} -m${bits}
-            enabled altivec && add_cflags -faltivec
-        ;;
-        esac
-    ;;
-    x86*)
-        case  ${tgt_os} in
-            win*)
-                enabled gcc && add_cflags -fno-common
-                ;;
-            solaris*)
-                CC=${CC:-${CROSS}gcc}
-                CXX=${CXX:-${CROSS}g++}
-                LD=${LD:-${CROSS}gcc}
-                CROSS=${CROSS:-g}
-                ;;
-            os2)
-                AS=${AS:-nasm}
-                ;;
-        esac
-
-        AS="${alt_as:-${AS:-auto}}"
-        case  ${tgt_cc} in
-            icc*)
-                CC=${CC:-icc}
-                LD=${LD:-icc}
-                setup_gnu_toolchain
-                add_cflags -use-msasm  # remove -use-msasm too?
-                # add -no-intel-extensions to suppress warning #10237
-                # refer to http://software.intel.com/en-us/forums/topic/280199
-                add_ldflags -i-static -no-intel-extensions
-                enabled x86_64 && add_cflags -ipo -static -O3 -no-prec-div
-                enabled x86_64 && AR=xiar
-                case ${tune_cpu} in
-                    atom*)
-                        tune_cflags="-x"
-                        tune_cpu="SSE3_ATOM"
-                    ;;
-                    *)
-                        tune_cflags="-march="
-                    ;;
-                esac
-            ;;
-            gcc*)
-                link_with_cc=gcc
-                tune_cflags="-march="
-                setup_gnu_toolchain
-                #for 32 bit x86 builds, -O3 did not turn on this flag
-                enabled optimizations && disabled gprof && check_add_cflags -fomit-frame-pointer
-            ;;
-            vs*)
-                # When building with Microsoft Visual Studio the assembler is
-                # invoked directly. Checking at configure time is unnecessary.
-                # Skip the check by setting AS arbitrarily
-                AS=msvs
-                msvs_arch_dir=x86-msvs
-                vc_version=${tgt_cc##vs}
-                case $vc_version in
-                    7|8|9|10)
-                         echo "${tgt_cc} does not support avx/avx2, disabling....."
-                         RTCD_OPTIONS="${RTCD_OPTIONS}--disable-avx --disable-avx2 "
-                         soft_disable avx
-                         soft_disable avx2
-                    ;;
-                esac
-            ;;
-        esac
-
-        bits=32
-        enabled x86_64 && bits=64
-        check_cpp <<EOF && bits=x32
+          # When building with Microsoft Visual Studio the assembler is
+          # invoked directly. Checking at configure time is unnecessary.
+          # Skip the check by setting AS arbitrarily
+          AS=msvs
+          msvs_arch_dir=x86-msvs
+          vc_version=${tgt_cc##vs}
+          case $vc_version in
+            7|8|9|10)
+              echo "${tgt_cc} does not support avx/avx2, disabling....."
+              RTCD_OPTIONS="${RTCD_OPTIONS}--disable-avx --disable-avx2 "
+              soft_disable avx
+              soft_disable avx2
+              ;;
+          esac
+          ;;
+      esac
+
+      bits=32
+      enabled x86_64 && bits=64
+      check_cpp <<EOF && bits=x32
 #ifndef __ILP32__
 #error "not x32"
 #endif
 EOF
-        case ${tgt_cc} in
-            gcc*)
-                add_cflags -m${bits}
-                add_ldflags -m${bits}
-            ;;
-        esac
-
-        soft_enable runtime_cpu_detect
-        # We can't use 'check_cflags' until the compiler is configured and CC is
-        # populated.
-        check_gcc_machine_option mmx
-        check_gcc_machine_option sse
-        check_gcc_machine_option sse2
-        check_gcc_machine_option sse3
-        check_gcc_machine_option ssse3
-        check_gcc_machine_option sse4 sse4_1
-        check_gcc_machine_option avx
-        check_gcc_machine_option avx2
-
-        case "${AS}" in
-            auto|"")
-                which nasm >/dev/null 2>&1 && AS=nasm
-                which yasm >/dev/null 2>&1 && AS=yasm
-                [ "${AS}" = auto ] || [ -z "${AS}" ] \
-                    && die "Neither yasm nor nasm have been found"
-            ;;
-        esac
-        log_echo "  using $AS"
-        [ "${AS##*/}" = nasm ] && add_asflags -Ox
-        AS_SFX=.asm
-        case  ${tgt_os} in
-            win32)
-                add_asflags -f win32
-                enabled debug && add_asflags -g cv8
-                EXE_SFX=.exe
-            ;;
-            win64)
-                add_asflags -f x64
-                enabled debug && add_asflags -g cv8
-                EXE_SFX=.exe
-            ;;
-            linux*|solaris*|android*)
-                add_asflags -f elf${bits}
-                enabled debug && [ "${AS}" = yasm ] && add_asflags -g dwarf2
-                enabled debug && [ "${AS}" = nasm ] && add_asflags -g
-                [ "${AS##*/}" = nasm ] && check_asm_align
-            ;;
-            darwin*)
-                add_asflags -f macho${bits}
-                enabled x86 && darwin_arch="-arch i386" || darwin_arch="-arch x86_64"
-                add_cflags  ${darwin_arch}
-                add_ldflags ${darwin_arch}
-                # -mdynamic-no-pic is still a bit of voodoo -- it was required at
-                # one time, but does not seem to be now, and it breaks some of the
-                # code that still relies on inline assembly.
-                # enabled icc && ! enabled pic && add_cflags -fno-pic -mdynamic-no-pic
-                enabled icc && ! enabled pic && add_cflags -fno-pic
-            ;;
-            iphonesimulator)
-                add_asflags -f macho${bits}
-                enabled x86 && sim_arch="-arch i386" || sim_arch="-arch x86_64"
-                add_cflags  ${sim_arch}
-                add_ldflags ${sim_arch}
-           ;;
-            os2)
-                add_asflags -f aout
-                enabled debug && add_asflags -g
-                EXE_SFX=.exe
-            ;;
-            *) log "Warning: Unknown os $tgt_os while setting up $AS flags"
-            ;;
-        esac
-    ;;
+      case ${tgt_cc} in
+        gcc*)
+          add_cflags -m${bits}
+          add_ldflags -m${bits}
+          ;;
+      esac
+
+      soft_enable runtime_cpu_detect
+      # We can't use 'check_cflags' until the compiler is configured and CC is
+      # populated.
+      check_gcc_machine_option mmx
+      check_gcc_machine_option sse
+      check_gcc_machine_option sse2
+      check_gcc_machine_option sse3
+      check_gcc_machine_option ssse3
+      check_gcc_machine_option sse4 sse4_1
+      check_gcc_machine_option avx
+      check_gcc_machine_option avx2
+
+      case "${AS}" in
+        auto|"")
+          which nasm >/dev/null 2>&1 && AS=nasm
+          which yasm >/dev/null 2>&1 && AS=yasm
+          [ "${AS}" = auto ] || [ -z "${AS}" ] \
+            && die "Neither yasm nor nasm have been found"
+          ;;
+      esac
+      log_echo "  using $AS"
+      [ "${AS##*/}" = nasm ] && add_asflags -Ox
+      AS_SFX=.asm
+      case  ${tgt_os} in
+        win32)
+          add_asflags -f win32
+          enabled debug && add_asflags -g cv8
+          EXE_SFX=.exe
+          ;;
+        win64)
+          add_asflags -f x64
+          enabled debug && add_asflags -g cv8
+          EXE_SFX=.exe
+          ;;
+        linux*|solaris*|android*)
+          add_asflags -f elf${bits}
+          enabled debug && [ "${AS}" = yasm ] && add_asflags -g dwarf2
+          enabled debug && [ "${AS}" = nasm ] && add_asflags -g
+          [ "${AS##*/}" = nasm ] && check_asm_align
+          ;;
+        darwin*)
+          add_asflags -f macho${bits}
+          enabled x86 && darwin_arch="-arch i386" || darwin_arch="-arch x86_64"
+          add_cflags  ${darwin_arch}
+          add_ldflags ${darwin_arch}
+          # -mdynamic-no-pic is still a bit of voodoo -- it was required at
+          # one time, but does not seem to be now, and it breaks some of the
+          # code that still relies on inline assembly.
+          # enabled icc && ! enabled pic && add_cflags -fno-pic -mdynamic-no-pic
+          enabled icc && ! enabled pic && add_cflags -fno-pic
+          ;;
+        iphonesimulator)
+          add_asflags -f macho${bits}
+          enabled x86 && sim_arch="-arch i386" || sim_arch="-arch x86_64"
+          add_cflags  ${sim_arch}
+          add_ldflags ${sim_arch}
+          ;;
+        os2)
+          add_asflags -f aout
+          enabled debug && add_asflags -g
+          EXE_SFX=.exe
+          ;;
+        *)
+          log "Warning: Unknown os $tgt_os while setting up $AS flags"
+          ;;
+      esac
+      ;;
     universal*|*-gcc|generic-gnu)
-        link_with_cc=gcc
-        enable_feature gcc
-    setup_gnu_toolchain
-    ;;
-    esac
-
-    # Try to enable CPU specific tuning
-    if [ -n "${tune_cpu}" ]; then
-        if [ -n "${tune_cflags}" ]; then
-            check_add_cflags ${tune_cflags}${tune_cpu} || \
-                die "Requested CPU '${tune_cpu}' not supported by compiler"
-        fi
+      link_with_cc=gcc
+      enable_feature gcc
+      setup_gnu_toolchain
+      ;;
+  esac
+
+  # Try to enable CPU specific tuning
+  if [ -n "${tune_cpu}" ]; then
+    if [ -n "${tune_cflags}" ]; then
+      check_add_cflags ${tune_cflags}${tune_cpu} || \
+        die "Requested CPU '${tune_cpu}' not supported by compiler"
+    fi
     if [ -n "${tune_asflags}" ]; then
-            check_add_asflags ${tune_asflags}${tune_cpu} || \
-                die "Requested CPU '${tune_cpu}' not supported by assembler"
-        fi
+      check_add_asflags ${tune_asflags}${tune_cpu} || \
+        die "Requested CPU '${tune_cpu}' not supported by assembler"
+    fi
     if [ -z "${tune_cflags}${tune_asflags}" ]; then
-            log_echo "Warning: CPU tuning not supported by this toolchain"
-        fi
+      log_echo "Warning: CPU tuning not supported by this toolchain"
     fi
-
-    if enabled debug; then
-        check_add_cflags -g && check_add_ldflags -g
+  fi
+
+  if enabled debug; then
+    check_add_cflags -g && check_add_ldflags -g
+  else
+    check_add_cflags -DNDEBUG
+  fi
+
+  enabled gprof && check_add_cflags -pg && check_add_ldflags -pg
+  enabled gcov &&
+    check_add_cflags -fprofile-arcs -ftest-coverage &&
+    check_add_ldflags -fprofile-arcs -ftest-coverage
+
+  if enabled optimizations; then
+    if enabled rvct; then
+      enabled small && check_add_cflags -Ospace || check_add_cflags -Otime
     else
-        check_add_cflags -DNDEBUG
+      enabled small && check_add_cflags -O2 ||  check_add_cflags -O3
     fi
-
-    enabled gprof && check_add_cflags -pg && check_add_ldflags -pg
-    enabled gcov &&
-        check_add_cflags -fprofile-arcs -ftest-coverage &&
-        check_add_ldflags -fprofile-arcs -ftest-coverage
-
-    if enabled optimizations; then
-        if enabled rvct; then
-            enabled small && check_add_cflags -Ospace || check_add_cflags -Otime
-        else
-            enabled small && check_add_cflags -O2 ||  check_add_cflags -O3
-        fi
-    fi
-
-    tgt_os_no_version=$(echo "${tgt_os}" | tr -d "[0-9]")
-    # Default use_x86inc to yes when we are 64 bit, non-pic, or on any
-    # non-Darwin target.
-    if [ "${tgt_isa}" = "x86_64" ] || [ "${pic}" != "yes" ] || \
-            [ "${tgt_os_no_version}" != "darwin" ]; then
-        soft_enable use_x86inc
-    fi
-
-    # Position Independent Code (PIC) support, for building relocatable
-    # shared objects
-    enabled gcc && enabled pic && check_add_cflags -fPIC
-
-    # Work around longjmp interception on glibc >= 2.11, to improve binary
-    # compatibility. See http://code.google.com/p/webm/issues/detail?id=166
-    enabled linux && check_add_cflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
-
-    # Check for strip utility variant
-    ${STRIP} -V 2>/dev/null | grep GNU >/dev/null && enable_feature gnu_strip
-
-    # Try to determine target endianness
-    check_cc <<EOF
-    unsigned int e = 'O'<<24 | '2'<<16 | 'B'<<8 | 'E';
+  fi
+
+  tgt_os_no_version=$(echo "${tgt_os}" | tr -d "[0-9]")
+  # Default use_x86inc to yes when we are 64 bit, non-pic, or on any
+  # non-Darwin target.
+  if [ "${tgt_isa}" = "x86_64" ] || [ "${pic}" != "yes" ] || \
+      [ "${tgt_os_no_version}" != "darwin" ]; then
+    soft_enable use_x86inc
+  fi
+
+  # Position Independent Code (PIC) support, for building relocatable
+  # shared objects
+  enabled gcc && enabled pic && check_add_cflags -fPIC
+
+  # Work around longjmp interception on glibc >= 2.11, to improve binary
+  # compatibility. See http://code.google.com/p/webm/issues/detail?id=166
+  enabled linux && check_add_cflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
+
+  # Check for strip utility variant
+  ${STRIP} -V 2>/dev/null | grep GNU >/dev/null && enable_feature gnu_strip
+
+  # Try to determine target endianness
+  check_cc <<EOF
+unsigned int e = 'O'<<24 | '2'<<16 | 'B'<<8 | 'E';
 EOF
     [ -f "${TMP_O}" ] && od -A n -t x1 "${TMP_O}" | tr -d '\n' |
         grep '4f *32 *42 *45' >/dev/null 2>&1 && enable_feature big_endian
 
     # Try to find which inline keywords are supported
     check_cc <<EOF && INLINE="inline"
-    static inline function() {}
+static inline function() {}
 EOF
     check_cc <<EOF && INLINE="__inline__ __attribute__((always_inline))"
-    static __attribute__((always_inline)) function() {}
+static __attribute__((always_inline)) function() {}
 EOF
 
-    # Almost every platform uses pthreads.
-    if enabled multithread; then
-        case ${toolchain} in
-            *-win*-vs*);;
-            *-android-gcc);;
-            *) check_header pthread.h && add_extralibs -lpthread
-        esac
-    fi
-
-    # only for MIPS platforms
+  # Almost every platform uses pthreads.
+  if enabled multithread; then
     case ${toolchain} in
-        mips*)
-            if enabled dspr2; then
-                if enabled big_endian; then
-                    echo "dspr2 optimizations are available only for little endian platforms"
-                    disable_feature dspr2
-                fi
-            fi
+      *-win*-vs*)
+        ;;
+      *-android-gcc)
+        ;;
+      *)
+        check_header pthread.h && add_extralibs -lpthread
         ;;
     esac
+  fi
 
-    # glibc needs these
-    if enabled linux; then
-        add_cflags -D_LARGEFILE_SOURCE
-        add_cflags -D_FILE_OFFSET_BITS=64
-    fi
+  # only for MIPS platforms
+  case ${toolchain} in
+    mips*)
+      if enabled dspr2; then
+        if enabled big_endian; then
+          echo "dspr2 optimizations are available only for little endian platforms"
+          disable_feature dspr2
+        fi
+      fi
+      ;;
+  esac
 
-    # append any user defined extra cflags
-    if [ -n "${extra_cflags}" ] ; then
-        check_add_cflags ${extra_cflags} || \
-        die "Requested extra CFLAGS '${extra_cflags}' not supported by compiler"
-    fi
+  # glibc needs these
+  if enabled linux; then
+    add_cflags -D_LARGEFILE_SOURCE
+    add_cflags -D_FILE_OFFSET_BITS=64
+  fi
+
+  # append any user defined extra cflags
+  if [ -n "${extra_cflags}" ] ; then
+    check_add_cflags ${extra_cflags} || \
+    die "Requested extra CFLAGS '${extra_cflags}' not supported by compiler"
+  fi
 }
 
 process_toolchain() {
-    process_common_toolchain
+  process_common_toolchain
 }
 
 print_config_mk() {
-    saved_prefix="${prefix}"
-    prefix=$1
-    makefile=$2
-    shift 2
-    for cfg; do
-        if enabled $cfg; then
-            upname="`toupper $cfg`"
-            echo "${prefix}_${upname}=yes" >> $makefile
-        fi
-    done
-    prefix="${saved_prefix}"
+  saved_prefix="${prefix}"
+  prefix=$1
+  makefile=$2
+  shift 2
+  for cfg; do
+    if enabled $cfg; then
+      upname="`toupper $cfg`"
+      echo "${prefix}_${upname}=yes" >> $makefile
+    fi
+  done
+  prefix="${saved_prefix}"
 }
 
 print_config_h() {
-    saved_prefix="${prefix}"
-    prefix=$1
-    header=$2
-    shift 2
-    for cfg; do
-        upname="`toupper $cfg`"
-        if enabled $cfg; then
-            echo "#define ${prefix}_${upname} 1" >> $header
-        else
-            echo "#define ${prefix}_${upname} 0" >> $header
-        fi
-    done
-    prefix="${saved_prefix}"
+  saved_prefix="${prefix}"
+  prefix=$1
+  header=$2
+  shift 2
+  for cfg; do
+    upname="`toupper $cfg`"
+    if enabled $cfg; then
+      echo "#define ${prefix}_${upname} 1" >> $header
+    else
+      echo "#define ${prefix}_${upname} 0" >> $header
+    fi
+  done
+  prefix="${saved_prefix}"
 }
 
 print_config_vars_h() {
-    header=$1
-    shift
-    while [ $# -gt 0 ]; do
-        upname="`toupper $1`"
-        echo "#define ${upname} $2" >> $header
-        shift 2
-    done
+  header=$1
+  shift
+  while [ $# -gt 0 ]; do
+    upname="`toupper $1`"
+    echo "#define ${upname} $2" >> $header
+    shift 2
+  done
 }
 
 print_webm_license() {
-    saved_prefix="${prefix}"
-    destination=$1
-    prefix="$2"
-    suffix="$3"
-    shift 3
-    cat <<EOF > ${destination}
+  saved_prefix="${prefix}"
+  destination=$1
+  prefix="$2"
+  suffix="$3"
+  shift 3
+  cat <<EOF > ${destination}
 ${prefix} Copyright (c) 2011 The WebM project authors. All Rights Reserved.${suffix}
 ${prefix} ${suffix}
 ${prefix} Use of this source code is governed by a BSD-style license${suffix}
 ${prefix} that can be found in the LICENSE file in the root of the source${suffix}
 ${prefix} tree. An additional intellectual property rights grant can be found${suffix}
 ${prefix} in the file PATENTS.  All contributing project authors may${suffix}
 ${prefix} be found in the AUTHORS file in the root of the source tree.${suffix}
 EOF
-    prefix="${saved_prefix}"
+  prefix="${saved_prefix}"
 }
 
 process_targets() {
-    true;
+  true;
 }
 
 process_detect() {
-    true;
+  true;
 }
 
 enable_feature logging
 logfile="config.log"
 self=$0
 process() {
-    cmdline_args="$@"
-    process_cmdline "$@"
-    if enabled child; then
-        echo "# ${self} $@" >> ${logfile}
-    else
-        echo "# ${self} $@" > ${logfile}
-    fi
-    post_process_common_cmdline
-    post_process_cmdline
-    process_toolchain
-    process_detect
-    process_targets
+  cmdline_args="$@"
+  process_cmdline "$@"
+  if enabled child; then
+    echo "# ${self} $@" >> ${logfile}
+  else
+    echo "# ${self} $@" > ${logfile}
+  fi
+  post_process_common_cmdline
+  post_process_cmdline
+  process_toolchain
+  process_detect
+  process_targets
 
-    OOT_INSTALLS="${OOT_INSTALLS}"
-    if enabled source_path_used; then
-    # Prepare the PWD for building.
-    for f in ${OOT_INSTALLS}; do
-            install -D "${source_path}/$f" "$f"
-    done
-    fi
-    cp "${source_path}/build/make/Makefile" .
+  OOT_INSTALLS="${OOT_INSTALLS}"
+  if enabled source_path_used; then
+  # Prepare the PWD for building.
+  for f in ${OOT_INSTALLS}; do
+    install -D "${source_path}/$f" "$f"
+  done
+  fi
+  cp "${source_path}/build/make/Makefile" .
 
-    clean_temp_files
-    true
+  clean_temp_files
+  true
 }