configure

   1 #!/bin/sh
   2 ##
   3 ##  configure
   4 ##
   5 ##  This script is the front-end to the build system. It provides a similar
   6 ##  interface to standard configure scripts with some extra bits for dealing
   7 ##  with toolchains that differ from the standard POSIX interface and
   8 ##  for extracting subsets of the source tree. In theory, reusable parts
   9 ##  of this script were intended to live in build/make/configure.sh,
  10 ##  but in practice, the line is pretty blurry.
  11 ##
  12 ##  This build system is based in part on the FFmpeg configure script.
  13 ##
  14
  15 #source_path="`dirname \"$0\"`"
  16 source_path=${0%/*}
  17 . "${source_path}/build/make/configure.sh"
  18
  19 show_help(){
  20     show_help_pre
  21     cat << EOF
  22 Advanced options:
  23   ${toggle_libs}                  libraries
  24   ${toggle_examples}              examples
  25   ${toggle_tools}                 tools
  26   ${toggle_docs}                  documentation
  27   ${toggle_unit_tests}            unit tests
  28   ${toggle_decode_perf_tests}     build decoder perf tests with unit tests
  29   ${toggle_encode_perf_tests}     build encoder perf tests with unit tests
  30   --cpu=CPU                       tune for the specified CPU (ARM: cortex-a8, X86: sse3)
  31   --libc=PATH                     path to alternate libc
  32   --size-limit=WxH                max size to allow in the decoder
  33   --as={yasm|nasm|auto}           use specified assembler [auto, yasm preferred]
  34   ${toggle_codec_srcs}            in/exclude codec library source code
  35   ${toggle_debug_libs}            in/exclude debug version of libraries
  36   ${toggle_static_msvcrt}         use static MSVCRT (VS builds only)
  37   ${toggle_vp9_highbitdepth}      use VP9 high bit depth (10/12) profiles
  38   ${toggle_better_hw_compatibility}
  39                                   enable encoder to produce streams with better
  40                                   hardware decoder compatibility
  41   ${toggle_vp8}                   VP8 codec support
  42   ${toggle_vp9}                   VP9 codec support
  43   ${toggle_internal_stats}        output of encoder internal stats for debug, if supported (encoders)
  44   ${toggle_postproc}              postprocessing
  45   ${toggle_vp9_postproc}          vp9 specific postprocessing
  46   ${toggle_multithread}           multithreaded encoding and decoding
  47   ${toggle_spatial_resampling}    spatial sampling (scaling) support
  48   ${toggle_realtime_only}         enable this option while building for real-time encoding
  49   ${toggle_onthefly_bitpacking}   enable on-the-fly bitpacking in real-time encoding
  50   ${toggle_error_concealment}     enable this option to get a decoder which is able to conceal losses
  51   ${toggle_coefficient_range_checking}
  52                                   enable decoder to check if intermediate
  53                                   transform coefficients are in valid range
  54   ${toggle_runtime_cpu_detect}    runtime cpu detection
  55   ${toggle_shared}                shared library support
  56   ${toggle_static}                static library support
  57   ${toggle_small}                 favor smaller size over speed
  58   ${toggle_postproc_visualizer}   macro block / block level visualizers
  59   ${toggle_multi_res_encoding}    enable multiple-resolution encoding
  60   ${toggle_temporal_denoising}    enable temporal denoising and disable the spatial denoiser
  61   ${toggle_vp9_temporal_denoising}
  62                                   enable vp9 temporal denoising
  63   ${toggle_webm_io}               enable input from and output to WebM container
  64   ${toggle_libyuv}                enable libyuv
  65
  66 Codecs:
  67   Codecs can be selectively enabled or disabled individually, or by family:
  68       --disable-<codec>
  69   is equivalent to:
  70       --disable-<codec>-encoder
  71       --disable-<codec>-decoder
  72
  73   Codecs available in this distribution:
  74 EOF
  75 #restore editor state '
  76
  77     family="";
  78     last_family="";
  79     c="";
  80     str="";
  81     for c in ${CODECS}; do
  82         family=${c%_*}
  83         if [ "${family}" != "${last_family}" ]; then
  84             [ -z "${str}" ] || echo "${str}"
  85             str="$(printf '    %10s:' ${family})"
  86         fi
  87         str="${str} $(printf '%10s' ${c#*_})"
  88         last_family=${family}
  89     done
  90     echo "${str}"
  91     show_help_post
  92 }
  93
  94 ##
  95 ## BEGIN APPLICATION SPECIFIC CONFIGURATION
  96 ##
  97
  98 # all_platforms is a list of all supported target platforms. Maintain
  99 # alphabetically by architecture, generic-gnu last.
 100 all_platforms="${all_platforms} arm64-android-gcc"
 101 all_platforms="${all_platforms} arm64-darwin-gcc"
 102 all_platforms="${all_platforms} arm64-linux-gcc"
 103 all_platforms="${all_platforms} arm64-win64-gcc"
 104 all_platforms="${all_platforms} arm64-win64-vs15"
 105 all_platforms="${all_platforms} armv7-android-gcc"   #neon Cortex-A8
 106 all_platforms="${all_platforms} armv7-darwin-gcc"    #neon Cortex-A8
 107 all_platforms="${all_platforms} armv7-linux-rvct"    #neon Cortex-A8
 108 all_platforms="${all_platforms} armv7-linux-gcc"     #neon Cortex-A8
 109 all_platforms="${all_platforms} armv7-none-rvct"     #neon Cortex-A8
 110 all_platforms="${all_platforms} armv7-win32-gcc"
 111 all_platforms="${all_platforms} armv7-win32-vs14"
 112 all_platforms="${all_platforms} armv7-win32-vs15"
 113 all_platforms="${all_platforms} armv7s-darwin-gcc"
 114 all_platforms="${all_platforms} armv8-linux-gcc"
 115 all_platforms="${all_platforms} mips32-linux-gcc"
 116 all_platforms="${all_platforms} mips64-linux-gcc"
 117 all_platforms="${all_platforms} ppc64le-linux-gcc"
 118 all_platforms="${all_platforms} sparc-solaris-gcc"
 119 all_platforms="${all_platforms} x86-android-gcc"
 120 all_platforms="${all_platforms} x86-darwin8-gcc"
 121 all_platforms="${all_platforms} x86-darwin8-icc"
 122 all_platforms="${all_platforms} x86-darwin9-gcc"
 123 all_platforms="${all_platforms} x86-darwin9-icc"
 124 all_platforms="${all_platforms} x86-darwin10-gcc"
 125 all_platforms="${all_platforms} x86-darwin11-gcc"
 126 all_platforms="${all_platforms} x86-darwin12-gcc"
 127 all_platforms="${all_platforms} x86-darwin13-gcc"
 128 all_platforms="${all_platforms} x86-darwin14-gcc"
 129 all_platforms="${all_platforms} x86-darwin15-gcc"
 130 all_platforms="${all_platforms} x86-darwin16-gcc"
 131 all_platforms="${all_platforms} x86-darwin17-gcc"
 132 all_platforms="${all_platforms} x86-iphonesimulator-gcc"
 133 all_platforms="${all_platforms} x86-linux-gcc"
 134 all_platforms="${all_platforms} x86-linux-icc"
 135 all_platforms="${all_platforms} x86-os2-gcc"
 136 all_platforms="${all_platforms} x86-solaris-gcc"
 137 all_platforms="${all_platforms} x86-win32-gcc"
 138 all_platforms="${all_platforms} x86-win32-vs14"
 139 all_platforms="${all_platforms} x86-win32-vs15"
 140 all_platforms="${all_platforms} x86-win32-vs16"
 141 all_platforms="${all_platforms} x86_64-android-gcc"
 142 all_platforms="${all_platforms} x86_64-darwin9-gcc"
 143 all_platforms="${all_platforms} x86_64-darwin10-gcc"
 144 all_platforms="${all_platforms} x86_64-darwin11-gcc"
 145 all_platforms="${all_platforms} x86_64-darwin12-gcc"
 146 all_platforms="${all_platforms} x86_64-darwin13-gcc"
 147 all_platforms="${all_platforms} x86_64-darwin14-gcc"
 148 all_platforms="${all_platforms} x86_64-darwin15-gcc"
 149 all_platforms="${all_platforms} x86_64-darwin16-gcc"
 150 all_platforms="${all_platforms} x86_64-darwin17-gcc"
 151 all_platforms="${all_platforms} x86_64-darwin18-gcc"
 152 all_platforms="${all_platforms} x86_64-darwin19-gcc"
 153 all_platforms="${all_platforms} x86_64-iphonesimulator-gcc"
 154 all_platforms="${all_platforms} x86_64-linux-gcc"
 155 all_platforms="${all_platforms} x86_64-linux-icc"
 156 all_platforms="${all_platforms} x86_64-solaris-gcc"
 157 all_platforms="${all_platforms} x86_64-win64-gcc"
 158 all_platforms="${all_platforms} x86_64-win64-vs14"
 159 all_platforms="${all_platforms} x86_64-win64-vs15"
 160 all_platforms="${all_platforms} x86_64-win64-vs16"
 161 all_platforms="${all_platforms} generic-gnu"
 162
 163 # all_targets is a list of all targets that can be configured
 164 # note that these should be in dependency order for now.
 165 all_targets="libs examples tools docs"
 166
 167 # all targets available are enabled, by default.
 168 for t in ${all_targets}; do
 169     [ -f "${source_path}/${t}.mk" ] && enable_feature ${t}
 170 done
 171
 172 if ! diff --version >/dev/null; then
 173   die "diff missing: Try installing diffutils via your package manager."
 174 fi
 175
 176 if ! perl --version >/dev/null; then
 177     die "Perl is required to build"
 178 fi
 179
 180 if [ "`cd \"${source_path}\" && pwd`" != "`pwd`" ]; then
 181   # test to see if source_path already configured
 182   if [ -f "${source_path}/vpx_config.h" ]; then
 183     die "source directory already configured; run 'make distclean' there first"
 184   fi
 185 fi
 186
 187 # check installed doxygen version
 188 doxy_version=$(doxygen --version 2>/dev/null)
 189 doxy_major=${doxy_version%%.*}
 190 if [ ${doxy_major:-0} -ge 1 ]; then
 191     doxy_version=${doxy_version#*.}
 192     doxy_minor=${doxy_version%%.*}
 193     doxy_patch=${doxy_version##*.}
 194
 195     [ $doxy_major -gt 1 ] && enable_feature doxygen
 196     [ $doxy_minor -gt 5 ] && enable_feature doxygen
 197     [ $doxy_minor -eq 5 ] && [ $doxy_patch -ge 3 ] && enable_feature doxygen
 198 fi
 199
 200 # disable codecs when their source directory does not exist
 201 [ -d "${source_path}/vp8" ] || disable_codec vp8
 202 [ -d "${source_path}/vp9" ] || disable_codec vp9
 203
 204 # install everything except the sources, by default. sources will have
 205 # to be enabled when doing dist builds, since that's no longer a common
 206 # case.
 207 enabled doxygen && enable_feature install_docs
 208 enable_feature install_bins
 209 enable_feature install_libs
 210
 211 enable_feature static
 212 enable_feature optimizations
 213 enable_feature dependency_tracking
 214 enable_feature spatial_resampling
 215 enable_feature multithread
 216 enable_feature os_support
 217 enable_feature temporal_denoising
 218
 219 CODECS="
 220     vp8_encoder
 221     vp8_decoder
 222     vp9_encoder
 223     vp9_decoder
 224 "
 225 CODEC_FAMILIES="
 226     vp8
 227     vp9
 228 "
 229
 230 ARCH_LIST="
 231     arm
 232     mips
 233     x86
 234     x86_64
 235     ppc
 236 "
 237 ARCH_EXT_LIST_X86="
 238     mmx
 239     sse
 240     sse2
 241     sse3
 242     ssse3
 243     sse4_1
 244     avx
 245     avx2
 246     avx512
 247 "
 248
 249 ARCH_EXT_LIST_LOONGSON="
 250     mmi
 251 "
 252
 253 ARCH_EXT_LIST="
 254     neon
 255     neon_asm
 256
 257     mips32
 258     dspr2
 259     msa
 260     mips64
 261
 262     ${ARCH_EXT_LIST_X86}
 263
 264     vsx
 265
 266     ${ARCH_EXT_LIST_LOONGSON}
 267 "
 268 HAVE_LIST="
 269     ${ARCH_EXT_LIST}
 270     vpx_ports
 271     pthread_h
 272     unistd_h
 273 "
 274 EXPERIMENT_LIST="
 275     fp_mb_stats
 276     emulate_hardware
 277     non_greedy_mv
 278     rate_ctrl
 279 "
 280 CONFIG_LIST="
 281     dependency_tracking
 282     external_build
 283     install_docs
 284     install_bins
 285     install_libs
 286     install_srcs
 287     debug
 288     gprof
 289     gcov
 290     rvct
 291     gcc
 292     msvs
 293     pic
 294     big_endian
 295
 296     codec_srcs
 297     debug_libs
 298
 299     dequant_tokens
 300     dc_recon
 301     runtime_cpu_detect
 302     postproc
 303     vp9_postproc
 304     multithread
 305     internal_stats
 306     ${CODECS}
 307     ${CODEC_FAMILIES}
 308     encoders
 309     decoders
 310     static_msvcrt
 311     spatial_resampling
 312     realtime_only
 313     onthefly_bitpacking
 314     error_concealment
 315     shared
 316     static
 317     small
 318     postproc_visualizer
 319     os_support
 320     unit_tests
 321     webm_io
 322     libyuv
 323     decode_perf_tests
 324     encode_perf_tests
 325     multi_res_encoding
 326     temporal_denoising
 327     vp9_temporal_denoising
 328     consistent_recode
 329     coefficient_range_checking
 330     vp9_highbitdepth
 331     better_hw_compatibility
 332     experimental
 333     size_limit
 334     always_adjust_bpm
 335     bitstream_debug
 336     mismatch_debug
 337     ${EXPERIMENT_LIST}
 338 "
 339 CMDLINE_SELECT="
 340     dependency_tracking
 341     external_build
 342     extra_warnings
 343     werror
 344     install_docs
 345     install_bins
 346     install_libs
 347     install_srcs
 348     debug
 349     gprof
 350     gcov
 351     pic
 352     optimizations
 353     ccache
 354     runtime_cpu_detect
 355     thumb
 356
 357     libs
 358     examples
 359     tools
 360     docs
 361     libc
 362     as
 363     size_limit
 364     codec_srcs
 365     debug_libs
 366
 367     dequant_tokens
 368     dc_recon
 369     postproc
 370     vp9_postproc
 371     multithread
 372     internal_stats
 373     ${CODECS}
 374     ${CODEC_FAMILIES}
 375     static_msvcrt
 376     spatial_resampling
 377     realtime_only
 378     onthefly_bitpacking
 379     error_concealment
 380     shared
 381     static
 382     small
 383     postproc_visualizer
 384     unit_tests
 385     webm_io
 386     libyuv
 387     decode_perf_tests
 388     encode_perf_tests
 389     multi_res_encoding
 390     temporal_denoising
 391     vp9_temporal_denoising
 392     consistent_recode
 393     coefficient_range_checking
 394     better_hw_compatibility
 395     vp9_highbitdepth
 396     experimental
 397     always_adjust_bpm
 398     bitstream_debug
 399     mismatch_debug
 400 "
 401
 402 process_cmdline() {
 403     for opt do
 404         optval="${opt#*=}"
 405         case "$opt" in
 406         --disable-codecs)
 407           for c in ${CODEC_FAMILIES}; do disable_codec $c; done
 408           ;;
 409         --enable-?*|--disable-?*)
 410         eval `echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g'`
 411         if is_in ${option} ${EXPERIMENT_LIST}; then
 412             if enabled experimental; then
 413                 ${action}_feature $option
 414             else
 415                 log_echo "Ignoring $opt -- not in experimental mode."
 416             fi
 417         elif is_in ${option} "${CODECS} ${CODEC_FAMILIES}"; then
 418             ${action}_codec ${option}
 419         else
 420             process_common_cmdline $opt
 421         fi
 422         ;;
 423         *) process_common_cmdline "$opt"
 424         ;;
 425         esac
 426     done
 427 }
 428
 429 post_process_cmdline() {
 430     if enabled coefficient_range_checking; then
 431       echo "coefficient-range-checking is for decoders only, disabling encoders:"
 432       soft_disable vp8_encoder
 433       soft_disable vp9_encoder
 434     fi
 435
 436     c=""
 437
 438     # Enable all detected codecs, if they haven't been disabled
 439     for c in ${CODECS}; do soft_enable $c; done
 440
 441     # Enable the codec family if any component of that family is enabled
 442     for c in ${CODECS}; do
 443         enabled $c && enable_feature ${c%_*}
 444     done
 445
 446     # Set the {en,de}coders variable if any algorithm in that class is enabled
 447     for c in ${CODECS}; do
 448         enabled ${c} && enable_feature ${c##*_}s
 449     done
 450 }
 451
 452
 453 process_targets() {
 454     enabled child || write_common_config_banner
 455     write_common_target_config_h ${BUILD_PFX}vpx_config.h
 456     write_common_config_targets
 457     enabled win_arm64_neon_h_workaround && write_win_arm64_neon_h_workaround ${BUILD_PFX}arm_neon.h
 458
 459     # Calculate the default distribution name, based on the enabled features
 460     cf=""
 461     DIST_DIR=vpx
 462     for cf in $CODEC_FAMILIES; do
 463         if enabled ${cf}_encoder && enabled ${cf}_decoder; then
 464             DIST_DIR="${DIST_DIR}-${cf}"
 465         elif enabled ${cf}_encoder; then
 466             DIST_DIR="${DIST_DIR}-${cf}cx"
 467         elif enabled ${cf}_decoder; then
 468             DIST_DIR="${DIST_DIR}-${cf}dx"
 469         fi
 470     done
 471     enabled debug_libs && DIST_DIR="${DIST_DIR}-debug"
 472     enabled codec_srcs && DIST_DIR="${DIST_DIR}-src"
 473     ! enabled postproc && ! enabled vp9_postproc && DIST_DIR="${DIST_DIR}-nopost"
 474     ! enabled multithread && DIST_DIR="${DIST_DIR}-nomt"
 475     ! enabled install_docs && DIST_DIR="${DIST_DIR}-nodocs"
 476     DIST_DIR="${DIST_DIR}-${tgt_isa}-${tgt_os}"
 477     case "${tgt_os}" in
 478     win*) enabled static_msvcrt && DIST_DIR="${DIST_DIR}mt" || DIST_DIR="${DIST_DIR}md"
 479           DIST_DIR="${DIST_DIR}-${tgt_cc}"
 480           ;;
 481     esac
 482     if [ -f "${source_path}/build/make/version.sh" ]; then
 483         ver=`"$source_path/build/make/version.sh" --bare "$source_path"`
 484         DIST_DIR="${DIST_DIR}-${ver}"
 485         VERSION_STRING=${ver}
 486         ver=${ver%%-*}
 487         VERSION_PATCH=${ver##*.}
 488         ver=${ver%.*}
 489         VERSION_MINOR=${ver##*.}
 490         ver=${ver#v}
 491         VERSION_MAJOR=${ver%.*}
 492     fi
 493     enabled child || cat <<EOF >> config.mk
 494
 495 PREFIX=${prefix}
 496 ifeq (\$(MAKECMDGOALS),dist)
 497 DIST_DIR?=${DIST_DIR}
 498 else
 499 DIST_DIR?=\$(DESTDIR)${prefix}
 500 endif
 501 LIBSUBDIR=${libdir##${prefix}/}
 502
 503 VERSION_STRING=${VERSION_STRING}
 504
 505 VERSION_MAJOR=${VERSION_MAJOR}
 506 VERSION_MINOR=${VERSION_MINOR}
 507 VERSION_PATCH=${VERSION_PATCH}
 508
 509 CONFIGURE_ARGS=${CONFIGURE_ARGS}
 510 EOF
 511     enabled child || echo "CONFIGURE_ARGS?=${CONFIGURE_ARGS}" >> config.mk
 512
 513     #
 514     # Write makefiles for all enabled targets
 515     #
 516     for tgt in libs examples tools docs solution; do
 517         tgt_fn="$tgt-$toolchain.mk"
 518
 519         if enabled $tgt; then
 520             echo "Creating makefiles for ${toolchain} ${tgt}"
 521             write_common_target_config_mk $tgt_fn ${BUILD_PFX}vpx_config.h
 522             #write_${tgt}_config
 523         fi
 524     done
 525
 526 }
 527
 528 process_detect() {
 529     if enabled shared; then
 530         # Can only build shared libs on a subset of platforms. Doing this check
 531         # here rather than at option parse time because the target auto-detect
 532         # magic happens after the command line has been parsed.
 533         case "${tgt_os}" in
 534         linux|os2|solaris|darwin*|iphonesimulator*)
 535             # Supported platforms
 536             ;;
 537         *)
 538             if enabled gnu; then
 539                 echo "--enable-shared is only supported on ELF; assuming this is OK"
 540             else
 541                 die "--enable-shared only supported on ELF, OS/2, and Darwin for now"
 542             fi
 543             ;;
 544         esac
 545     fi
 546     if [ -z "$CC" ] || enabled external_build; then
 547         echo "Bypassing toolchain for environment detection."
 548         enable_feature external_build
 549         check_header() {
 550             log fake_check_header "$@"
 551             header=$1
 552             shift
 553             var=`echo $header | sed 's/[^A-Za-z0-9_]/_/g'`
 554             disable_feature $var
 555             # Headers common to all environments
 556             case $header in
 557                 stdio.h)
 558                     true;
 559                 ;;
 560                 *)
 561                     result=false
 562                     for d in "$@"; do
 563                         [ -f "${d##-I}/$header" ] && result=true && break
 564                     done
 565                     ${result:-true}
 566             esac && enable_feature $var
 567
 568             # Specialize windows and POSIX environments.
 569             case $toolchain in
 570                 *-win*-*)
 571                     # Don't check for any headers in Windows builds.
 572                     false
 573                 ;;
 574                 *)
 575                     case $header in
 576                         pthread.h) true;;
 577                         unistd.h) true;;
 578                         *) false;;
 579                     esac && enable_feature $var
 580             esac
 581             enabled $var
 582         }
 583         check_ld() {
 584             true
 585         }
 586         check_lib() {
 587             true
 588         }
 589     fi
 590     check_header stdio.h || die "Unable to invoke compiler: ${CC} ${CFLAGS}"
 591     check_ld <<EOF || die "Toolchain is unable to link executables"
 592 int main(void) {return 0;}
 593 EOF
 594     # check system headers
 595
 596     # Use both check_header and check_lib here, since check_lib
 597     # could be a stub that always returns true.
 598     check_header pthread.h && check_lib -lpthread <<EOF || disable_feature pthread_h
 599 #include <pthread.h>
 600 #include <stddef.h>
 601 int main(void) { return pthread_create(NULL, NULL, NULL, NULL); }
 602 EOF
 603     check_header unistd.h # for sysconf(3) and friends.
 604
 605     check_header vpx/vpx_integer.h -I${source_path} && enable_feature vpx_ports
 606
 607     if enabled neon && ! enabled external_build; then
 608       check_header arm_neon.h || die "Unable to find arm_neon.h"
 609     fi
 610 }
 611
 612 process_toolchain() {
 613     process_common_toolchain
 614
 615     # Enable some useful compiler flags
 616     if enabled gcc; then
 617         enabled werror && check_add_cflags -Werror
 618         check_add_cflags -Wall
 619         check_add_cflags -Wdeclaration-after-statement
 620         check_add_cflags -Wdisabled-optimization
 621         check_add_cflags -Wfloat-conversion
 622         check_add_cflags -Wparentheses-equality
 623         check_add_cflags -Wpointer-arith
 624         check_add_cflags -Wtype-limits
 625         check_add_cflags -Wcast-qual
 626         check_add_cflags -Wvla
 627         check_add_cflags -Wimplicit-function-declaration
 628         check_add_cflags -Wmissing-declarations
 629         check_add_cflags -Wmissing-prototypes
 630         check_add_cflags -Wuninitialized
 631         check_add_cflags -Wunreachable-code-loop-increment
 632         check_add_cflags -Wunused
 633         check_add_cflags -Wextra
 634         # check_add_cflags also adds to cxxflags. gtest does not do well with
 635         # these flags so add them explicitly to CFLAGS only.
 636         check_cflags -Wundef && add_cflags_only -Wundef
 637         check_cflags -Wframe-larger-than=52000 && \
 638           add_cflags_only -Wframe-larger-than=52000
 639         if enabled mips || [ -z "${INLINE}" ]; then
 640           enabled extra_warnings || check_add_cflags -Wno-unused-function
 641         fi
 642         # Enforce c89 for c files. Don't be too strict about it though. Allow
 643         # gnu extensions like "//" for comments.
 644         check_cflags -std=gnu89 && add_cflags_only -std=gnu89
 645         # Avoid this warning for third_party C++ sources. Some reorganization
 646         # would be needed to apply this only to test/*.cc.
 647         check_cflags -Wshorten-64-to-32 && add_cflags_only -Wshorten-64-to-32
 648
 649         # Quiet gcc 6 vs 7 abi warnings:
 650         # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728
 651         if enabled arm; then
 652           check_add_cxxflags -Wno-psabi
 653         fi
 654
 655         # disable some warnings specific to libyuv.
 656         check_cxxflags -Wno-missing-declarations \
 657           && LIBYUV_CXXFLAGS="${LIBYUV_CXXFLAGS} -Wno-missing-declarations"
 658         check_cxxflags -Wno-missing-prototypes \
 659           && LIBYUV_CXXFLAGS="${LIBYUV_CXXFLAGS} -Wno-missing-prototypes"
 660         check_cxxflags -Wno-unused-parameter \
 661           && LIBYUV_CXXFLAGS="${LIBYUV_CXXFLAGS} -Wno-unused-parameter"
 662     fi
 663
 664     if enabled icc; then
 665         enabled werror && check_add_cflags -Werror
 666         check_add_cflags -Wall
 667         check_add_cflags -Wpointer-arith
 668
 669         # ICC has a number of floating point optimizations that we disable
 670         # in favor of deterministic output WRT to other compilers
 671         add_cflags -fp-model precise
 672     fi
 673
 674     # Enable extra, harmless warnings. These might provide additional insight
 675     # to what the compiler is doing and why, but in general, but they shouldn't
 676     # be treated as fatal, even if we're treating warnings as errors.
 677     GCC_EXTRA_WARNINGS="
 678         -Wdisabled-optimization
 679         -Winline
 680     "
 681     enabled gcc && EXTRA_WARNINGS="${GCC_EXTRA_WARNINGS}"
 682     RVCT_EXTRA_WARNINGS="
 683         --remarks
 684     "
 685     enabled rvct && EXTRA_WARNINGS="${RVCT_EXTRA_WARNINGS}"
 686     if enabled extra_warnings; then
 687         for w in ${EXTRA_WARNINGS}; do
 688             check_add_cflags ${w}
 689             enabled gcc && enabled werror && check_add_cflags -Wno-error=${w}
 690         done
 691     fi
 692
 693     # ccache only really works on gcc toolchains
 694     enabled gcc || soft_disable ccache
 695     if enabled mips; then
 696         enable_feature dequant_tokens
 697         enable_feature dc_recon
 698     fi
 699
 700     if enabled internal_stats; then
 701         enable_feature vp9_postproc
 702     fi
 703
 704     # Enable the postbuild target if building for visual studio.
 705     case "$tgt_cc" in
 706         vs*) enable_feature msvs
 707              enable_feature solution
 708              vs_version=${tgt_cc##vs}
 709              VCPROJ_SFX=vcxproj
 710              gen_vcproj_cmd=${source_path}/build/make/gen_msvs_vcxproj.sh
 711              enabled werror && gen_vcproj_cmd="${gen_vcproj_cmd} --enable-werror"
 712              all_targets="${all_targets} solution"
 713              INLINE="__inline"
 714         ;;
 715     esac
 716
 717     # Other toolchain specific defaults
 718     case $toolchain in x86*) soft_enable postproc;; esac
 719
 720     if enabled postproc_visualizer; then
 721         enabled postproc || die "postproc_visualizer requires postproc to be enabled"
 722     fi
 723
 724     # Enable unit tests by default if we have a working C++ compiler.
 725     case "$toolchain" in
 726         *-vs*)
 727             soft_enable unit_tests
 728             soft_enable webm_io
 729             soft_enable libyuv
 730         ;;
 731         *-android-*)
 732             check_add_cxxflags -std=c++11 && soft_enable webm_io
 733             soft_enable libyuv
 734             # GTestLog must be modified to use Android logging utilities.
 735         ;;
 736         *-darwin-*)
 737             check_add_cxxflags -std=c++11
 738             # iOS/ARM builds do not work with gtest. This does not match
 739             # x86 targets.
 740         ;;
 741         *-iphonesimulator-*)
 742             check_add_cxxflags -std=c++11 && soft_enable webm_io
 743             soft_enable libyuv
 744         ;;
 745         *-win*)
 746             # Some mingw toolchains don't have pthread available by default.
 747             # Treat these more like visual studio where threading in gtest
 748             # would be disabled for the same reason.
 749             check_add_cxxflags -std=c++11 && soft_enable unit_tests \
 750               && soft_enable webm_io
 751             check_cxx "$@" <<EOF && soft_enable libyuv
 752 int z;
 753 EOF
 754         ;;
 755         *)
 756             enabled pthread_h && check_add_cxxflags -std=c++11 \
 757               && soft_enable unit_tests
 758             check_add_cxxflags -std=c++11 && soft_enable webm_io
 759             check_cxx "$@" <<EOF && soft_enable libyuv
 760 int z;
 761 EOF
 762         ;;
 763     esac
 764     # libwebm needs to be linked with C++ standard library
 765     enabled webm_io && LD=${CXX}
 766
 767     # append any user defined extra cflags
 768     if [ -n "${extra_cflags}" ] ; then
 769         check_add_cflags ${extra_cflags} || \
 770         die "Requested extra CFLAGS '${extra_cflags}' not supported by compiler"
 771     fi
 772     if [ -n "${extra_cxxflags}" ]; then
 773         check_add_cxxflags ${extra_cxxflags} || \
 774         die "Requested extra CXXFLAGS '${extra_cxxflags}' not supported by compiler"
 775     fi
 776 }
 777
 778
 779 ##
 780 ## END APPLICATION SPECIFIC CONFIGURATION
 781 ##
 782 CONFIGURE_ARGS="$@"
 783 process "$@"
 784 print_webm_license ${BUILD_PFX}vpx_config.c "/*" " */"
 785 cat <<EOF >> ${BUILD_PFX}vpx_config.c
 786 #include "vpx/vpx_codec.h"
 787 static const char* const cfg = "$CONFIGURE_ARGS";
 788 const char *vpx_codec_build_config(void) {return cfg;}
 789 EOF