h264_metadata: Add option to delete filler data
[libav.git] / configure
index c5d4e26..1c35f9d 100755 (executable)
--- a/configure
+++ b/configure
@@ -73,7 +73,6 @@ Help options:
   --list-protocols         show all available protocols
   --list-bsfs              show all available bitstream filters
   --list-indevs            show all available input devices
-  --list-outdevs           show all available output devices
   --list-filters           show all available filters
 
 Standard options:
@@ -163,9 +162,6 @@ Individual component options:
   --enable-indev=NAME      enable input device NAME
   --disable-indev=NAME     disable input device NAME
   --disable-indevs         disable input devices
-  --enable-outdev=NAME     enable output device NAME
-  --disable-outdev=NAME    disable output device NAME
-  --disable-outdevs        disable output devices
   --disable-devices        disable all devices
   --enable-filter=NAME     enable filter NAME
   --disable-filter=NAME    disable filter NAME
@@ -235,6 +231,7 @@ External library support:
   --enable-zlib              compression [autodetect]
 
   The following libraries provide various hardware acceleration features:
+  --enable-amf     AMF video encoding code [auto]
   --enable-cuda    Nvidia CUDA (dynamically linked)
   --enable-cuvid   Nvidia CUVID video decode acceleration
   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
@@ -351,8 +348,6 @@ EOF
   exit 0
 }
 
-quotes='""'
-
 log(){
     echo "$@" >> $logfile
 }
@@ -517,13 +512,13 @@ disable_weak(){
 
 enable_sanitized(){
     for var; do
-        enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
+        enable $(sanitize_var_name $var)
     done
 }
 
 disable_sanitized(){
     for var; do
-        disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
+        disable $(sanitize_var_name $var)
     done
 }
 
@@ -556,12 +551,12 @@ enable_deep_weak(){
 }
 
 enabled(){
-    test "${1#!}" = "$1" && op== || op=!=
+    test "${1#!}" = "$1" && op="=" || op="!="
     eval test "x\$${1#!}" $op "xyes"
 }
 
 disabled(){
-    test "${1#!}" = "$1" && op== || op=!=
+    test "${1#!}" = "$1" && op="=" || op="!="
     eval test "x\$${1#!}" $op "xno"
 }
 
@@ -903,6 +898,7 @@ check_objcflags(){
 
 test_ldflags(){
     log test_ldflags "$@"
+    set -- $($ldflags_filter "$@")
     check_ld "$@" <<EOF
 int main(void){ return 0; }
 EOF
@@ -929,13 +925,15 @@ check_stripflags(){
 
 check_header(){
     log check_header "$@"
-    header=$1
+    headers=$1
     shift
-    disable_sanitized $header
-    check_cpp "$@" <<EOF && enable_sanitized $header
-#include <$header>
-int x;
-EOF
+    disable_sanitized $headers
+    {
+        for hdr in $headers; do
+            print_include $hdr
+        done
+        echo "int x;"
+    } | check_cpp "$@" && enable_sanitized $headers
 }
 
 check_func(){
@@ -1127,14 +1125,14 @@ require(){
 }
 
 require_header(){
-    log require "$@"
-    header="$1"
+    log require_header "$@"
+    headers="$1"
     shift
-    check_header "$header" "$@" || die "ERROR: $header not found"
+    check_header "$headers" "$@" || die "ERROR: $headers not found"
 }
 
 require_cpp_condition(){
-    log require "$@"
+    log require_cpp_condition "$@"
     header="$1"
     condition="$2"
     shift 2
@@ -1197,12 +1195,6 @@ check_host_cpp_condition(){
 EOF
 }
 
-apply(){
-    file=$1
-    shift
-    "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
-}
-
 cp_if_changed(){
     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
     mkdir -p "$(dirname $2)"
@@ -1222,7 +1214,6 @@ AVCODEC_COMPONENTS="
 
 AVDEVICE_COMPONENTS="
     indevs
-    outdevs
 "
 AVFILTER_COMPONENTS="
     filters
@@ -1265,6 +1256,7 @@ HWACCEL_LIBRARY_NONFREE_LIST="
 "
 HWACCEL_LIBRARY_LIST="
     $HWACCEL_LIBRARY_NONFREE_LIST
+    amf
     d3d11va
     dxva2
     libmfx
@@ -1560,7 +1552,6 @@ HEADERS_LIST="
     machine_ioctl_meteor_h
     malloc_h
     poll_h
-    stdatomic_h
     sys_param_h
     sys_resource_h
     sys_select_h
@@ -1605,12 +1596,20 @@ MATH_FUNCS="
     truncf
 "
 
+SYSTEM_FEATURES="
+    dos_paths
+    libc_msvcrt
+    MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
+    section_data_rel_ro
+    threads
+    uwp
+"
+
 SYSTEM_FUNCS="
     aligned_malloc
     clock_gettime
     closesocket
     CommandLineToArgvW
-    CryptGenRandom
     fcntl
     getaddrinfo
     gethrtime
@@ -1644,6 +1643,15 @@ SYSTEM_FUNCS="
     VirtualAlloc
 "
 
+SYSTEM_LIBRARIES="
+    sdl
+    vaapi_1
+    vaapi_drm
+    vaapi_x11
+    vdpau_x11
+    wincrypt
+"
+
 TOOLCHAIN_FEATURES="
     as_arch_directive
     as_fpu_directive
@@ -1691,20 +1699,12 @@ HAVE_LIST="
     $HEADERS_LIST
     $INTRINSICS_LIST
     $MATH_FUNCS
+    $SYSTEM_FEATURES
     $SYSTEM_FUNCS
+    $SYSTEM_LIBRARIES
     $THREADS_LIST
     $TOOLCHAIN_FEATURES
     $TYPES_LIST
-    dos_paths
-    libc_msvcrt
-    MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
-    sdl
-    section_data_rel_ro
-    threads
-    uwp
-    vaapi_drm
-    vaapi_x11
-    vdpau_x11
 "
 
 # options emitted with CONFIG_ prefix but not available on the command line
@@ -2185,8 +2185,6 @@ h264_d3d11va2_hwaccel_deps="d3d11va"
 h264_d3d11va2_hwaccel_select="h264_decoder"
 h264_dxva2_hwaccel_deps="dxva2"
 h264_dxva2_hwaccel_select="h264_decoder"
-h264_mmal_hwaccel_deps="mmal"
-h264_qsv_hwaccel_deps="libmfx"
 h264_vaapi_hwaccel_deps="vaapi"
 h264_vaapi_hwaccel_select="h264_decoder"
 h264_vda_hwaccel_deps="vda"
@@ -2203,7 +2201,6 @@ hevc_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
 hevc_d3d11va2_hwaccel_select="hevc_decoder"
 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
 hevc_dxva2_hwaccel_select="hevc_decoder"
-hevc_qsv_hwaccel_deps="libmfx"
 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
 hevc_vaapi_hwaccel_select="hevc_decoder"
 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
@@ -2216,8 +2213,6 @@ mpeg2_d3d11va2_hwaccel_deps="d3d11va"
 mpeg2_d3d11va2_hwaccel_select="mpeg2video_decoder"
 mpeg2_dxva2_hwaccel_deps="dxva2"
 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
-mpeg2_mmal_hwaccel_deps="mmal"
-mpeg2_qsv_hwaccel_deps="libmfx"
 mpeg2_vaapi_hwaccel_deps="vaapi"
 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
 mpeg2_vdpau_hwaccel_deps="vdpau"
@@ -2232,13 +2227,10 @@ vc1_d3d11va2_hwaccel_deps="d3d11va"
 vc1_d3d11va2_hwaccel_select="vc1_decoder"
 vc1_dxva2_hwaccel_deps="dxva2"
 vc1_dxva2_hwaccel_select="vc1_decoder"
-vc1_mmal_hwaccel_deps="mmal"
-vc1_qsv_hwaccel_deps="libmfx"
 vc1_vaapi_hwaccel_deps="vaapi"
 vc1_vaapi_hwaccel_select="vc1_decoder"
 vc1_vdpau_hwaccel_deps="vdpau"
 vc1_vdpau_hwaccel_select="vc1_decoder"
-vp8_qsv_hwaccel_deps="libmfx"
 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
 vp8_vaapi_hwaccel_select="vp8_decoder"
 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
@@ -2248,6 +2240,7 @@ wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
 
 # hardware-accelerated codecs
+amf_deps_any="libdl LoadLibrary"
 nvenc_deps_any="libdl LoadLibrary"
 omx_deps="libdl pthreads"
 omx_rpi_select="omx"
@@ -2260,15 +2253,17 @@ vaapi_encode_deps="vaapi"
 hwupload_cuda_filter_deps="cuda"
 scale_npp_filter_deps="cuda libnpp"
 
+h264_amf_encoder_deps="amf"
 h264_mmal_decoder_deps="mmal"
 h264_nvenc_encoder_deps="nvenc"
 h264_omx_encoder_deps="omx"
-h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
+h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec"
 h264_qsv_encoder_select="qsvenc"
 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
 h264_vaapi_encoder_select="cbs_h264 vaapi_encode"
+hevc_amf_encoder_deps="amf"
 hevc_nvenc_encoder_deps="nvenc"
-hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
+hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec"
 hevc_qsv_encoder_select="hevcparse qsvenc"
 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
 hevc_vaapi_encoder_select="cbs_h265 vaapi_encode"
@@ -2277,14 +2272,14 @@ mjpeg_qsv_encoder_select="qsvenc"
 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
 mpeg2_mmal_decoder_deps="mmal"
-mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
+mpeg2_qsv_decoder_select="qsvdec mpegvideo_parser"
 mpeg2_qsv_encoder_select="qsvenc"
 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
 mpeg2_vaapi_encoder_select="cbs_mpeg2 vaapi_encode"
 mpeg4_omx_encoder_deps="omx"
 vc1_mmal_decoder_deps="mmal"
-vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
-vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
+vc1_qsv_decoder_select="qsvdec vc1_parser"
+vp8_qsv_decoder_select="qsvdec vp8_parser"
 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
 vp8_vaapi_encoder_select="vaapi_encode"
 vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
@@ -2432,24 +2427,19 @@ wtv_demuxer_select="mpegts_demuxer riffdec"
 xmv_demuxer_select="riffdec"
 xwma_demuxer_select="riffdec"
 
-# indevs / outdevs
+# indevs
 alsa_indev_deps="alsa"
-alsa_outdev_deps="alsa"
 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
-dv1394_indev_deps="dv1394"
-dv1394_indev_select="dv_demuxer"
 fbdev_indev_deps="linux_fb_h"
 jack_indev_deps="libjack"
 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
 libcdio_indev_deps="libcdio"
 libdc1394_indev_deps="libdc1394"
 oss_indev_deps_any="sys_soundcard_h"
-oss_outdev_deps_any="sys_soundcard_h"
 pulse_indev_deps="libpulse"
 sndio_indev_deps="sndio"
-sndio_outdev_deps="sndio"
 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
 vfwcap_indev_deps="vfw32 vfwcap_defines"
 xcbgrab_indev_deps="libxcb libxcb_shape"
@@ -2602,6 +2592,7 @@ pkg_config_default=pkg-config
 ranlib="ranlib"
 strip="strip"
 version_script='--version-script'
+objformat="elf32"
 
 # machine
 arch_default=$(uname -m)
@@ -2710,11 +2701,9 @@ find_things(){
 
 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
-HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
-OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
 
@@ -2726,6 +2715,7 @@ find_things_extern(){
 }
 
 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
+HWACCEL_LIST=$(find_things_extern hwaccel AVHWAccel libavcodec/hwaccels.h)
 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
 
 AVCODEC_COMPONENTS_LIST="
@@ -2738,7 +2728,6 @@ AVCODEC_COMPONENTS_LIST="
 
 AVDEVICE_COMPONENTS_LIST="
     $INDEV_LIST
-    $OUTDEV_LIST
 "
 
 AVFILTER_COMPONENTS_LIST="
@@ -2799,7 +2788,7 @@ for opt do
             add_extralibs $optval
         ;;
         --disable-devices)
-            disable $INDEV_LIST $OUTDEV_LIST
+            disable $INDEV_LIST
         ;;
         --enable-debug=*)
             debuglevel="$optval"
@@ -2868,6 +2857,19 @@ done
 
 disabled logging && logfile=/dev/null
 
+# command line configuration sanity checks
+
+# we need to build at least one lib type
+if ! enabled_any static shared; then
+    cat <<EOF
+At least one library type must be built.
+Specify --enable-static to build the static libraries or --enable-shared to
+build the shared libraries as well. To only build the shared libraries specify
+--disable-static in addition to --enable-shared.
+EOF
+    exit 1
+fi
+
 # Die early if licensing-related configure options are incompatible.
 die_license_disabled() {
     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
@@ -2879,6 +2881,18 @@ map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
 
 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
 
+if enabled nonfree; then
+    license="nonfree and unredistributable"
+elif enabled gplv3; then
+    license="GPL version 3 or later"
+elif enabled lgplv3; then
+    license="LGPL version 3 or later"
+elif enabled gpl; then
+    license="GPL version 2 or later"
+else
+    license="LGPL version 2.1 or later"
+fi
+
 enabled_all gnutls openssl &&
     die "GnuTLS and OpenSSL must not be enabled at the same time."
 
@@ -2957,6 +2971,9 @@ case "$toolchain" in
         nm_default="dumpbin -symbols"
         ar_default="lib"
         case "$arch" in
+        aarch64|arm64)
+            as_default="armasm64"
+            ;;
         arm*)
             as_default="armasm"
             ;;
@@ -2994,11 +3011,10 @@ case "$toolchain" in
     ;;
 esac
 
-test -n "$cross_prefix" && enable cross_compile
-
-if enabled cross_compile; then
+if test -n "$cross_prefix"; then
     test -n "$arch" && test -n "$target_os" ||
         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
+    enable cross_compile
 fi
 
 ar_default="${cross_prefix}${ar_default}"
@@ -3160,17 +3176,6 @@ icl_flags(){
     done
 }
 
-pgi_flags(){
-    for flag; do
-        case $flag in
-            -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
-            -fomit-frame-pointer) echo -Mnoframe ;;
-            -g)                   echo -gopt ;;
-            *)                    echo $flag ;;
-        esac
-    done
-}
-
 suncc_flags(){
     for flag; do
         case $flag in
@@ -3208,35 +3213,6 @@ suncc_flags(){
     done
 }
 
-tms470_flags(){
-    for flag; do
-        case $flag in
-            -march=*|-mcpu=*)
-                case "${flag#*=}" in
-                    armv7-a|cortex-a*)      echo -mv=7a8 ;;
-                    armv7-r|cortex-r*)      echo -mv=7r4 ;;
-                    armv7-m|cortex-m*)      echo -mv=7m3 ;;
-                    armv6*|arm11*)          echo -mv=6   ;;
-                    armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
-                                            echo -mv=5e  ;;
-                    armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
-                esac
-                ;;
-            -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
-            -mfpu=vfp)      echo --float_support=vfpv2        ;;
-            -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
-            -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
-            -msoft-float)   echo --float_support=vfplib       ;;
-            -O[0-3]|-mf=*)  echo $flag                        ;;
-            -g)             echo -g -mn                       ;;
-            -pds=*)         echo $flag                        ;;
-            -D*|-I*)        echo $flag                        ;;
-            --gcc|--abi=*)  echo $flag                        ;;
-            -me)            echo $flag                        ;;
-        esac
-    done
-}
-
 probe_cc(){
     pfx=$1
     _cc=$2
@@ -3293,16 +3269,6 @@ probe_cc(){
         _depflags='-MMD'
         _cflags_speed='-O3'
         _cflags_size='-Os'
-    elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
-        _type=tms470
-        _ident=$($_cc -version | head -n1 | tr -s ' ')
-        _flags='--gcc --abi=eabi -me'
-        _cc_e='-ppl -fe=$@'
-        _cc_o='-fe=$@'
-        _depflags='-ppa -ppd=$(@:.o=.d)'
-        _cflags_speed='-O3 -mf=5'
-        _cflags_size='-O3 -mf=2'
-        _flags_filter=tms470_flags
     elif $_cc -v 2>&1 | grep -q clang; then
         _type=clang
         _ident=$($_cc --version 2>/dev/null | head -n1)
@@ -3332,14 +3298,6 @@ probe_cc(){
         _cflags_speed='-O2'
         _cflags_size='-Os'
         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
-    elif $_cc -V 2>&1 | grep -q Portland; then
-        _type=pgi
-        _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
-        opt_common='-alias=ansi -Mdse -Mlre -Mpre'
-        _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
-        _cflags_size="-O2 -Munroll=c:1 $opt_common"
-        _cflags_noopt="-O1"
-        _flags_filter=pgi_flags
     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
         _type=armasm
         _ident=$($_cc | head -n1)
@@ -3485,12 +3443,6 @@ fi
 if $ar 2>&1 | grep -q Microsoft; then
     arflags="-nologo"
     ar_o='-out:$@'
-elif $ar 2>&1 | grep -q 'Texas Instruments'; then
-    arflags="rq"
-    ar_o='$@'
-elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
-    arflags='-Xany -r -c'
-    ar_o='$@'
 else
     arflags="rc"
     ar_o='$@'
@@ -3506,10 +3458,6 @@ if test -n "$sysroot"; then
             add_cppflags --sysroot="$sysroot"
             add_ldflags --sysroot="$sysroot"
         ;;
-        tms470)
-            add_cppflags -I"$sysinclude"
-            add_ldflags  --sysroot="$sysroot"
-        ;;
     esac
 fi
 
@@ -3825,54 +3773,52 @@ check_host_cflags $host_cflags_speed
 check_64bit(){
     arch32=$1
     arch64=$2
-    expr=$3
+    expr=${3:-'sizeof(void *) > 4'}
     check_code cc "" "int test[2*($expr) - 1]" &&
         subarch=$arch64 || subarch=$arch32
+    enable $subarch
 }
 
 case "$arch" in
     aarch64|alpha|ia64)
-        spic=$shared
+        enabled shared && enable_weak pic
     ;;
     mips)
         check_64bit mips mips64 '_MIPS_SIM > 1'
-        spic=$shared
+        enabled shared && enable_weak pic
     ;;
     parisc)
-        check_64bit parisc parisc64 'sizeof(void *) > 4'
-        spic=$shared
+        check_64bit parisc parisc64
+        enabled shared && enable_weak pic
     ;;
     ppc)
-        check_64bit ppc ppc64 'sizeof(void *) > 4'
-        spic=$shared
+        check_64bit ppc ppc64
+        enabled shared && enable_weak pic
     ;;
     s390)
-        check_64bit s390 s390x 'sizeof(void *) > 4'
-        spic=$shared
+        check_64bit s390 s390x
+        enabled shared && enable_weak pic
     ;;
     sparc)
-        check_64bit sparc sparc64 'sizeof(void *) > 4'
-        spic=$shared
+        check_64bit sparc sparc64
+        enabled shared && enable_weak pic
     ;;
     x86)
-        check_64bit x86_32 x86_64 'sizeof(void *) > 4'
-        if test "$subarch" = "x86_64"; then
-            spic=$shared
+        check_64bit x86_32 x86_64
+        if enabled x86_64; then
+            enabled shared && enable_weak pic
+            objformat=elf64
         fi
     ;;
 esac
 
-enable $subarch
-enabled spic && enable_weak pic
-
-enabled x86_64 && objformat=elf64 || objformat="elf32"
-
 # OS specific
 case $target_os in
     aix)
         SHFLAGS=-shared
         add_cppflags '-I\$(SRC_PATH)/compat/aix'
         enabled shared && add_ldflags -Wl,-brtl
+        arflags='-Xany -r -c'
         ;;
     android)
         disable symver
@@ -3888,7 +3834,7 @@ case $target_os in
         ;;
     sunos)
         SHFLAGS='-shared -Wl,-h,$$(@F)'
-        enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
+        enabled x86 && append SHFLAGS -mimpure-text
         network_extralibs="-lsocket -lnsl"
         # When using suncc to build, the Solaris linker will mark
         # an executable with each instruction set encountered by
@@ -3905,7 +3851,6 @@ case $target_os in
     netbsd)
         disable symver
         oss_indev_extralibs="-lossaudio"
-        oss_outdev_extralibs="-lossaudio"
         ;;
     openbsd|bitrig)
         disable symver
@@ -3913,7 +3858,6 @@ case $target_os in
         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
         SLIB_INSTALL_LINKS=
         oss_indev_extralibs="-lossaudio"
-        oss_outdev_extralibs="-lossaudio"
         ;;
     dragonfly)
         disable symver
@@ -3950,9 +3894,13 @@ case $target_os in
         LIBTARGET=i386
         if enabled x86_64; then
             LIBTARGET="i386:x86-64"
+        elif enabled arm; then
+            LIBTARGET="arm"
+        elif enabled aarch64; then
+            LIBTARGET="arm64"
         fi
         if enabled shared; then
-            # Cannot build both shared and static libs when using dllexport.
+            # Cannot build both shared and static libs when using dllimport.
             disable static
         fi
         check_ldflags -Wl,--nxcompat
@@ -3967,7 +3915,7 @@ case $target_os in
         SLIB_INSTALL_LINKS=
         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
-        SLIB_CREATE_DEF_CMD='ARCH="$(ARCH)" AR="$(AR_CMD)" NM="$(NM_CMD)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
+        SLIB_CREATE_DEF_CMD='EXTERN_PREFIX="$(EXTERN_PREFIX)" AR="$(AR_CMD)" NM="$(NM_CMD)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-auto-image-base $$(@:$(SLIBSUF)=.def)'
         enabled x86_64 && objformat="win64" || objformat="win32"
         dlltool="${cross_prefix}dlltool"
@@ -3988,7 +3936,7 @@ case $target_os in
         SLIBSUF=".dll"
         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
-        SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
+        SLIB_CREATE_DEF_CMD='EXTERN_PREFIX="$(EXTERN_PREFIX)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
         SLIB_INSTALL_LINKS=
         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
@@ -4019,7 +3967,6 @@ case $target_os in
         add_cppflags -U__STRICT_ANSI__
         ;;
     linux)
-        enable dv1394
         enable section_data_rel_ro
         ;;
     irix*)
@@ -4158,12 +4105,11 @@ EOF
         eval ${pfx}libc_type=default
         add_${pfx}cppflags -D_DEFAULT_SOURCE
     fi
+    eval test -n "\${${pfx}libc_type}" && enable ${pfx}libc_${libc_type}
 }
 
 probe_libc
-test -n "$libc_type" && enable libc_$libc_type
 probe_libc host_
-test -n "$host_libc_type" && enable host_libc_$host_libc_type
 
 # hacks for compiler/libc/os combinations
 
@@ -4171,42 +4117,16 @@ case $libc_type in
     bionic)
         add_compat strtod.o strtod=avpriv_strtod
         ;;
-    glibc)
-        if enabled tms470; then
-            CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
-            add_cppflags -D__USER_LABEL_PREFIX__=
-            add_cppflags -D__builtin_memset=memset
-            add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
-            add_cflags   -pds=48    # incompatible redefinition of macro
-        fi
-        ;;
 esac
 
 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
     add_cppflags '-I\$(SRC_PATH)/compat/float'
 
-esc(){
-    echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
-}
-
-echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" > avbuild/config.fate
-
 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
 
 set_default $PATHS_LIST
 set_default nm
 
-# we need to build at least one lib type
-if ! enabled_any static shared; then
-    cat <<EOF
-At least one library type must be built.
-Specify --enable-static to build the static libraries or --enable-shared to
-build the shared libraries as well. To only build the shared libraries specify
---disable-static in addition to --enable-shared.
-EOF
-    exit 1
-fi
-
 disabled optimizations || check_cflags -fomit-frame-pointer
 
 enable_weak_pic() {
@@ -4214,13 +4134,13 @@ enable_weak_pic() {
     enable pic
     add_cppflags -DPIC
     case "$target_os" in
-    mingw*|cygwin*)
+    mingw*|cygwin*|win*)
         ;;
     *)
         add_cflags -fPIC
+        add_asflags -fPIC
         ;;
     esac
-    add_asflags  -fPIC
 }
 
 enabled pic && enable_weak_pic
@@ -4233,9 +4153,8 @@ extern_prefix=${sym%%ff_extern*}
 
 ! disabled inline_asm && check_inline_asm inline_asm '"" ::'
 
-_restrict=
-for restrict_keyword in restrict __restrict__ __restrict; do
-    check_cc <<EOF && _restrict=$restrict_keyword && break
+for restrict_keyword in restrict __restrict__ __restrict ""; do
+    check_cc <<EOF && break
 void foo(char * $restrict_keyword p);
 EOF
 done
@@ -4356,14 +4275,15 @@ EOF
 .object_arch armv4
 EOF
 
+    # MS armasm fails to assemble our PIC constructs
     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
 
 elif enabled mips; then
 
-    check_inline_asm loongson '"dmult.g $1, $2, $3"'
+    # make sure that only one instruction set is enabled
+    disable $ARCH_EXT_LIST_MIPS
 
-    # make sure that only an instruction set is enabled
-    disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
+    check_inline_asm loongson '"dmult.g $1, $2, $3"'
 
     if enabled mips64; then
         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
@@ -4610,7 +4530,7 @@ check_header windows.h
 # it seems there are versions of clang in some distros that try to use the
 # gcc headers, which explodes for stdatomic
 # so we also check that atomics actually work here
-check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
+check_builtin stdatomic stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
 
 check_lib ole32    "windows.h"            CoTaskMemFree        -lole32
 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
@@ -4657,11 +4577,10 @@ if ! disabled pthreads && ! enabled w32threads; then
     elif check_func pthread_join; then
         enable pthreads
     fi
+    enabled pthreads &&
+        check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)" $pthreads_extralibs
 fi
 
-enabled pthreads &&
-    check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)" $pthreads_extralibs
-
 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
 
@@ -4679,6 +4598,11 @@ for func in $MATH_FUNCS; do
 done
 
 # these are off by default, so fail if requested and not available
+
+enabled amf &&
+    check_cpp_condition "AMF/core/Version.h" \
+        "(AMF_VERSION_MAJOR << 48 | AMF_VERSION_MINOR << 32 | AMF_VERSION_RELEASE << 16 | AMF_VERSION_BUILD_NUM) >= 0x0001000400040001" ||
+    disable amf
 enabled avisynth          && require_header avisynth/avisynth_c.h
 enabled avxsynth          && require_header avxsynth/avxsynth_c.h
 enabled cuda              && require cuda cuda.h cuInit -lcuda
@@ -4780,23 +4704,20 @@ check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
 
 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
-{ check_header dev/bktr/ioctl_meteor.h &&
-  check_header dev/bktr/ioctl_bt848.h; } ||
-{ check_header machine/ioctl_meteor.h &&
-  check_header machine/ioctl_bt848.h; } ||
-{ check_header dev/video/meteor/ioctl_meteor.h &&
-  check_header dev/video/bktr/ioctl_bt848.h; } ||
-check_header dev/ic/bt8xx.h
+check_header "dev/bktr/ioctl_meteor.h dev/bktr/ioctl_bt848.h"                   ||
+    check_header "machine/ioctl_meteor.h machine/ioctl_bt848.h"                 ||
+    check_header "dev/video/meteor/ioctl_meteor.h dev/video/bktr/ioctl_bt848.h" ||
+    check_header "dev/ic/bt8xx.h"
 
 check_header sys/soundcard.h
 
-enabled_any alsa_indev alsa_outdev &&
+enabled alsa_indev &&
     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
 
 enabled libjack &&
     require_pkg_config libjack jack jack/jack.h jack_port_get_latency_range
 
-enabled_any sndio_indev sndio_outdev && check_lib sndio sndio.h sio_open -lsndio
+enabled sndio_indev && check_lib sndio sndio.h sio_open -lsndio
 
 if enabled libcdio; then
     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
@@ -4840,6 +4761,10 @@ enabled vaapi &&
 enabled vaapi &&
     check_lib vaapi_x11 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11
 
+enabled vaapi &&
+    check_cpp_condition "va/va.h" "VA_CHECK_VERSION(1, 0, 0)" &&
+    enable vaapi_1
+
 enabled vdpau &&
     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
     disable vdpau
@@ -4942,6 +4867,7 @@ if enabled proper_dce; then
     echo "X { local: *; };" > $TMPV
     if test_ldflags -Wl,${version_script},$TMPV; then
         append SHFLAGS '-Wl,${version_script},\$(SUBDIR)lib\$(NAME).ver'
+        quotes='""'
         check_cc <<EOF && enable symver_asm_label
 void ff_foo(void) __asm__ ("av_foo@VERSION");
 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
@@ -5031,9 +4957,6 @@ elif enabled armcc; then
     add_cflags -W${armcc_opt},--diag_suppress=3343 # hardfp compat
     add_cflags -W${armcc_opt},--diag_suppress=167  # pointer sign
     add_cflags -W${armcc_opt},--diag_suppress=513  # pointer sign
-elif enabled tms470; then
-    add_cflags -pds=824 -pds=837
-    disable inline_asm
 elif enabled pathscale; then
     add_cflags -fstrict-overflow -OPT:wrap_around_unsafe_opt=OFF
     disable inline_asm
@@ -5059,9 +4982,9 @@ elif enabled_any msvc icl; then
     # MSVC 2013 and newer can handle it fine.
     # If this declspec fails, force including stdlib.h before the restrict redefinition
     # happens in config.h.
-    if [ $_restrict != restrict ]; then
+    if [ $restrict_keyword != restrict ]; then
         check_cc <<EOF || add_cflags -FIstdlib.h
-__declspec($_restrict) void* foo(int);
+__declspec($restrict_keyword) void *foo(int);
 EOF
     fi
 fi
@@ -5142,7 +5065,7 @@ for thread in $THREADS_LIST; do
     fi
 done
 
-if disabled stdatomic_h; then
+if disabled stdatomic; then
     if enabled atomics_gcc; then
         add_cppflags '-I\$(SRC_PATH)/compat/atomics/gcc'
     elif enabled atomics_win32; then
@@ -5253,7 +5176,7 @@ echo "Programs:"
 print_enabled '' $PROGRAM_LIST | print_3_columns
 echo
 
-for type in decoder encoder hwaccel parser demuxer muxer protocol filter bsf indev outdev; do
+for type in decoder encoder hwaccel parser demuxer muxer protocol filter bsf indev; do
     echo "Enabled ${type}s:"
     eval list=\$$(toupper $type)_LIST
     print_enabled '_*' $list | print_3_columns
@@ -5267,25 +5190,20 @@ if test -n "$ignore_tests"; then
     echo
 fi
 
-license="LGPL version 2.1 or later"
-if enabled nonfree; then
-    license="nonfree and unredistributable"
-elif enabled gplv3; then
-    license="GPL version 3 or later"
-elif enabled lgplv3; then
-    license="LGPL version 3 or later"
-elif enabled gpl; then
-    license="GPL version 2 or later"
-fi
-
 echo "License: $license"
 
-echo "Creating configuration files ..."
-
 fi # test "$quiet" != "yes"
 
+test -n "$WARNINGS" && printf "\n$WARNINGS"
+
 test -e Makefile || echo "include $source_path/Makefile" > Makefile
 
+esc(){
+    echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
+}
+
+echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" > avbuild/config.fate
+
 config_files="$TMPH avbuild/config.mak"
 
 cat > avbuild/config.mak <<EOF
@@ -5303,6 +5221,7 @@ SRC_PATH=$source_path
 CC_IDENT=$cc_ident
 ARCH=$arch
 INTRINSICS=$intrinsics
+EXTERN_PREFIX=$extern_prefix
 CC=$cc
 AS=$as
 OBJCC=$objcc
@@ -5414,18 +5333,22 @@ cat > $TMPH <<EOF
 #define LIBAV_LICENSE "$(c_escape $license)"
 #define AVCONV_DATADIR "$(eval c_escape $datadir)"
 #define CC_IDENT "$(c_escape ${cc_ident:-Unknown compiler})"
-#define restrict $_restrict
 #define EXTERN_PREFIX "${extern_prefix}"
 #define EXTERN_ASM ${extern_prefix}
 #define SLIBSUF "$SLIBSUF"
 EOF
 
+test $restrict_keyword != restrict &&
+    echo "#define restrict $restrict_keyword" >> $TMPH
+
 test -n "$malloc_prefix" &&
     echo "#define MALLOC_PREFIX $malloc_prefix" >>$TMPH
 
 if enabled x86asm; then
     append config_files $TMPASM
-    printf '' >$TMPASM
+    cat > $TMPASM <<EOF
+; Automatically generated by configure - do not modify!
+EOF
 fi
 
 enabled getenv || echo "#define getenv(x) NULL" >> $TMPH
@@ -5445,7 +5368,7 @@ touch avbuild/.config
 enabled x86asm && cp_if_changed $TMPASM config.asm
 
 cat > $TMPH <<EOF
-/* Generated by ffconf */
+/* Generated by libav configure */
 #ifndef AVUTIL_AVCONFIG_H
 #define AVUTIL_AVCONFIG_H
 EOF
@@ -5473,11 +5396,9 @@ print_enabled_components(){
 print_enabled_components libavcodec/bsf_list.c AVBitStreamFilter bitstream_filters $BSF_LIST
 print_enabled_components libavformat/protocol_list.c URLProtocol url_protocols $PROTOCOL_LIST
 
-test -n "$WARNINGS" && printf "\n$WARNINGS"
-
 # Settings for pkg-config files
 
-cat > avbuild/config.sh <<EOF
+cat > $TMPH <<EOF
 # Automatically generated by configure - do not modify!
 shared=$shared
 prefix=$prefix
@@ -5497,5 +5418,7 @@ EOF
 
 for lib in $LIBRARY_LIST; do
     lib_deps="$(eval echo \$${lib}_deps)"
-    echo ${lib}_deps=\"$lib_deps\" >> avbuild/config.sh
+    echo ${lib}_deps=\"$lib_deps\" >> $TMPH
 done
+
+cp_if_changed $TMPH avbuild/config.sh