Add iOS static library GN build script.

webrtc/build/ios/build_ios_libs.sh

Index: webrtc/build/ios/build_ios_libs.sh
diff --git a/webrtc/build/ios/build_ios_libs.sh b/webrtc/build/ios/build_ios_libs.sh
index 9797b8dd2c752a33dce5a4fa339f2e19a202a6f8..a50140e335417f065897eaf266b06c719325f15b 100755
--- a/webrtc/build/ios/build_ios_libs.sh
+++ b/webrtc/build/ios/build_ios_libs.sh
@@ -8,262 +8,50 @@
 #  in the file PATENTS.  All contributing project authors may
 #  be found in the AUTHORS file in the root of the source tree.
 
-# Generates static or dynamic FAT libraries for ios in out_ios_libs.
+# Generates static FAT libraries for ios in out_ios_libs.
 
 # Exit on errors.
 set -e
 
-# Environment
-export PATH=/usr/libexec:$PATH
-
-# Globals.
 SCRIPT_DIR=$(cd $(dirname $0) && pwd)
 WEBRTC_BASE_DIR=${SCRIPT_DIR}/../../..
-GYP_WEBRTC_SCRIPT=${WEBRTC_BASE_DIR}/webrtc/build/gyp_webrtc.py
-MERGE_SCRIPT=${SCRIPT_DIR}/merge_ios_libs.py
-LICENSE_SCRIPT=${SCRIPT_DIR}/generate_licenses.py
-
-function check_preconditions {
-  # Check for Darwin.
-  if [[ ! $(uname) = "Darwin" ]]; then
-    echo "OS/X required." >&2
-    exit 1
-  fi
-
-  # Check for libtool.
-  if [[ -z $(which libtool) ]]; then
-    echo "Missing libtool binary." >&2
-    exit 1
-  fi
-
-  # Check for GYP generator.
-  if [[ ! -x ${GYP_WEBRTC_SCRIPT} ]]; then
-    echo "Failed to find gyp generator." >&2
-    exit 1
-  fi
-
-  # Check for merge script.
-  if [[ ! -x ${MERGE_SCRIPT} ]]; then
-    echo "Failed to find library merging script." >&2
-    exit 1
-  fi
-}
-
-function build_webrtc {
-  local base_output_dir=$1
-  local flavor=$2
-  local target_arch=$3
-  local build_type=$4
-  local libvpx_build_vp9=$5
-
-  local ninja_output_dir=${base_output_dir}/${target_arch}_ninja
-  local library_output_dir=${base_output_dir}/${target_arch}_libs
-  if [[ ${target_arch} = 'arm' || ${target_arch} = 'arm64' ]]; then
-    flavor="${flavor}-iphoneos"
-  else
-    flavor="${flavor}-iphonesimulator"
-  fi
-  local ninja_flavor_dir=${ninja_output_dir}/${flavor}
-
-  # Compile framework by default.
-  local gyp_file=webrtc/sdk/sdk.gyp
-  local gyp_target=rtc_sdk_framework_objc
-  # Set to 1 to explicitly not hide symbols. We'll want this if we're just
-  # generating static libs.
-  local override_visibility=0
-  if [[ ${build_type} = "legacy" ]]; then
-    echo "Building objc legacy libraries no longer supported."
-    exit 1
-  elif [[ ${build_type} = "static_only" ]]; then
-    echo "Building static only."
-    gyp_file=webrtc/build/ios/merge_ios_libs.gyp
-    gyp_target=rtc_sdk_peerconnection_objc_no_op
-    override_visibility=1
-  elif [[ ${build_type} == "framework" ]]; then
-    echo "Building framework."
-  else
-    echo "Unexpected build type: ${build_type}"
-    exit 1
-  fi
-
-  export GYP_DEFINES="OS=ios target_arch=${target_arch} \
-clang_xcode=1 ios_deployment_target=8.0 \
-ios_override_visibility=${override_visibility} \
-libvpx_build_vp9=${libvpx_build_vp9}"
-  export GYP_GENERATORS="ninja"
-  export GYP_GENERATOR_FLAGS="output_dir=${ninja_output_dir}"
-
-  # GYP generation requires relative path for some reason.
-  pushd ${WEBRTC_BASE_DIR}
-  webrtc/build/gyp_webrtc.py ${gyp_file}
-  popd
-  # Compile the target we're interested in.
-  ninja -C ${ninja_flavor_dir} ${gyp_target}
-
-  if [[ ${build_type} = "framework" ]]; then
-    # Manually generate the dSYM files before stripping them. GYP does not seem
-    # to instruct ninja to generate dSYM files.
-    dsymutil --out=${ninja_flavor_dir}/WebRTC.framework.dSYM \
-        ${ninja_flavor_dir}/WebRTC.framework/WebRTC
-  fi
-
-  # Make links to the generated static archives.
-  mkdir -p ${library_output_dir}
-  for f in ${ninja_flavor_dir}/*.a
-  do
-    ln -sf "${f}" "${library_output_dir}/$(basename ${f})"
-  done
-}
-
-function clean_artifacts {
-  local output_dir=$1
-  if [[ -d ${output_dir} ]]; then
-    rm -r ${output_dir}
-  fi
-}
 
-function usage {
-  echo "WebRTC iOS FAT libraries build script."
-  echo "Each architecture is compiled separately before being merged together."
-  echo "By default, the fat libraries will be created in out_ios_libs/fat_libs."
-  echo "The headers will be copied to out_ios_libs/include."
-  echo "Usage: $0 [-h] [-b build_type] [-c] [-o output_dir]"
-  echo "  -h Print this help."
-  echo "  -b The build type. Can be framework or static_only."
-  echo "     Defaults to framework."
-  echo "  -c Removes generated build output."
-  echo "  -o Specifies a directory to output build artifacts to."
-  echo "     If specified together with -c, deletes the dir."
-  echo "  -r Specifies a revision number to embed if building the framework."
-  exit 0
+SDK_OUTPUT_DIR=${WEBRTC_BASE_DIR}/out_ios_libs
+SDK_LIB_NAME="librtc_sdk_objc.a"
+GN_BASE_ARGS="target_os=\"ios\" is_debug=false ios_enable_code_signing=false \
+rtc_libvpx_build_vp9=false"
+GN_STATIC_TARGET_NAMES="rtc_sdk_peerconnection_objc field_trial_default \
+metrics_default"
+
+# TODO(tkchin): Restore functionality of old script to build dynamic framework,
+# symbols and license file.
+
+function build_static_webrtc {
+  local arch=$1
+  local xcode_arch=$2
+
+  OUTPUT_DIR=${SDK_OUTPUT_DIR}/${arch}_libs
+  OUTPUT_LIB=${OUTPUT_DIR}/${SDK_LIB_NAME}
+  GN_ARGS="${GN_BASE_ARGS} target_cpu=\"${arch}\""
+  gn gen ${OUTPUT_DIR} --args="${GN_ARGS}"
+  ninja -C ${OUTPUT_DIR} ${GN_STATIC_TARGET_NAMES}
+  # Combine the object files together into a single archive and strip debug
+  # symbols.
+  find ${OUTPUT_DIR}/obj -type f -name "*.o" |
+     xargs ld -r -static -S -all_load -arch ${xcode_arch} -o ${OUTPUT_LIB}
 }
 
-check_preconditions
-
-# Set default arguments.
-# Output directory for build artifacts.
-OUTPUT_DIR=${WEBRTC_BASE_DIR}/out_ios_libs
-# The type of build to perform. Valid arguments are framework and static_only.
-BUILD_TYPE="framework"
-PERFORM_CLEAN=0
-FLAVOR="Profile"
-POINT_VERSION="0"
-# TODO(tkchin): Add ability to pass in a flag to build vp9. Odds are mobile
-# clients will not want it though because of the higher CPU usage.
-LIBVPX_BUILD_VP9=0
-
-# Parse arguments.
-while getopts "hb:co:r:" opt; do
-  case "${opt}" in
-    h) usage;;
-    b) BUILD_TYPE="${OPTARG}";;
-    c) PERFORM_CLEAN=1;;
-    o) OUTPUT_DIR="${OPTARG}";;
-    r) POINT_VERSION="${OPTARG}";;
-    *)
-      usage
-      exit 1
-      ;;
-  esac
-done
-
-if [[ ${PERFORM_CLEAN} -ne 0 ]]; then
-  clean_artifacts ${OUTPUT_DIR}
-  exit 0
-fi
-
 # Build all the common architectures.
-ARCHS=( "arm" "arm64" "ia32" "x64" )
-for ARCH in "${ARCHS[@]}"
-do
-  echo "Building WebRTC arch: ${ARCH}"
-  build_webrtc ${OUTPUT_DIR} ${FLAVOR} $ARCH ${BUILD_TYPE} ${LIBVPX_BUILD_VP9}
-done
-
-ARM_NINJA_DIR=${OUTPUT_DIR}/arm_ninja/${FLAVOR}-iphoneos
-ARM64_NINJA_DIR=${OUTPUT_DIR}/arm64_ninja/${FLAVOR}-iphoneos
-IA32_NINJA_DIR=${OUTPUT_DIR}/ia32_ninja/${FLAVOR}-iphonesimulator
-X64_NINJA_DIR=${OUTPUT_DIR}/x64_ninja/${FLAVOR}-iphonesimulator
-
-if [[ ${BUILD_TYPE} = "framework" ]]; then
-  # Merge the framework slices together into a FAT library by copying one arch
-  # output and merging the rest in.
-  DYLIB_PATH="WebRTC.framework/WebRTC"
-  cp -R ${ARM_NINJA_DIR}/WebRTC.framework ${OUTPUT_DIR}
-  rm ${OUTPUT_DIR}/${DYLIB_PATH}
-  echo "Merging framework slices."
-  lipo ${ARM_NINJA_DIR}/${DYLIB_PATH} \
-      ${ARM64_NINJA_DIR}/${DYLIB_PATH} \
-      ${IA32_NINJA_DIR}/${DYLIB_PATH} \
-      ${X64_NINJA_DIR}/${DYLIB_PATH} \
-      -create -output ${OUTPUT_DIR}/${DYLIB_PATH}
-
-  # Merge the dSYM files together in a similar fashion.
-  DSYM_PATH="WebRTC.framework.dSYM/Contents/Resources/DWARF/WebRTC"
-  cp -R ${ARM_NINJA_DIR}/WebRTC.framework.dSYM ${OUTPUT_DIR}
-  rm ${OUTPUT_DIR}/${DSYM_PATH}
-  echo "Merging dSYM slices."
-  lipo ${ARM_NINJA_DIR}/${DSYM_PATH} \
-      ${ARM64_NINJA_DIR}/${DSYM_PATH} \
-      ${IA32_NINJA_DIR}/${DSYM_PATH} \
-      ${X64_NINJA_DIR}/${DSYM_PATH} \
-      -create -output ${OUTPUT_DIR}/${DSYM_PATH}
-
-  # Strip the dynamic framework of non-global symbols.
-  # TODO(tkchin): Override chromium strip settings in supplement.gypi instead.
-  echo "Stripping non-global symbols."
-  strip -x ${OUTPUT_DIR}/${DYLIB_PATH}
-
-  # Modify the version number.
-  INFOPLIST_PATH=${OUTPUT_DIR}/WebRTC.framework/Info.plist
-  MAJOR_MINOR=$(PlistBuddy -c "Print :CFBundleShortVersionString" \
-                ${INFOPLIST_PATH})
-  VERSION_NUMBER="${MAJOR_MINOR}.${POINT_VERSION}"
-  echo "Substituting revision number: ${VERSION_NUMBER}"
-  PlistBuddy -c "Set :CFBundleVersion ${VERSION_NUMBER}" ${INFOPLIST_PATH}
-  plutil -convert binary1 ${INFOPLIST_PATH}
-
-  # Copy pod file.
-  FORMAT_STRING=s/\${FRAMEWORK_VERSION_NUMBER}/${VERSION_NUMBER}/g
-  sed -e ${FORMAT_STRING} ${WEBRTC_BASE_DIR}/webrtc/sdk/objc/WebRTC.podspec > \
-      ${OUTPUT_DIR}/WebRTC.podspec
-elif [[ ${BUILD_TYPE} = "static_only" ]]; then
-  echo "Merging static library slices."
-  # Merge the static libraries together into individual FAT archives.
-  ${MERGE_SCRIPT} ${OUTPUT_DIR}
-
-  # Merge the dSYM files together.
-  TARGET_NAME="rtc_sdk_peerconnection_objc_no_op"
-  DSYM_PATH="${TARGET_NAME}.app.dSYM/Contents/Resources/DWARF/${TARGET_NAME}"
-  cp -R ${ARM_NINJA_DIR}/${TARGET_NAME}.app.dSYM ${OUTPUT_DIR}
-  echo "Merging dSYM slices."
-  lipo ${ARM_NINJA_DIR}/${DSYM_PATH} \
-      ${ARM64_NINJA_DIR}/${DSYM_PATH} \
-      ${IA32_NINJA_DIR}/${DSYM_PATH} \
-      ${X64_NINJA_DIR}/${DSYM_PATH} \
-      -create -output ${OUTPUT_DIR}/${DSYM_PATH}
-
-  # Strip debugging symbols.
-  # TODO(tkchin): Override chromium settings in supplement.gypi instead to do
-  # stripping at build time.
-  echo "Stripping debug symbols."
-  strip -S ${OUTPUT_DIR}/fat_libs/*.a
-
-  # Symlink the headers.
-  echo "Symlinking headers."
-  INPUT_HEADER_DIR="${WEBRTC_BASE_DIR}/webrtc/sdk/objc/Framework/Headers/WebRTC"
-  OUTPUT_HEADER_DIR="${OUTPUT_DIR}/include"
-  if [[ -d ${OUTPUT_HEADER_DIR} ]]; then
-    rm -rf ${OUTPUT_HEADER_DIR}
-  fi
-  mkdir -p ${OUTPUT_HEADER_DIR}
-  ln -sf ${INPUT_HEADER_DIR} ${OUTPUT_HEADER_DIR}/WebRTC
-else
-  echo "BUILD_TYPE ${BUILD_TYPE} not supported."
-  exit 1
-fi
-
-echo "Generating LICENSE.html."
-${LICENSE_SCRIPT} ${OUTPUT_DIR}/arm64_libs ${OUTPUT_DIR}
-
-echo "Done!"
+build_static_webrtc "arm" "armv7"
+build_static_webrtc "arm64" "arm64"
+build_static_webrtc "x86" "i386"
+build_static_webrtc "x64" "x86_64"
+
+# Combine the libraries.
+lipo ${SDK_OUTPUT_DIR}/arm_libs/${SDK_LIB_NAME} \
+     ${SDK_OUTPUT_DIR}/arm64_libs/${SDK_LIB_NAME} \
+     ${SDK_OUTPUT_DIR}/x86_libs/${SDK_LIB_NAME} \
+     ${SDK_OUTPUT_DIR}/x64_libs/${SDK_LIB_NAME} \
+     -create -output ${SDK_OUTPUT_DIR}/${SDK_LIB_NAME}
+
+echo "Done."