Build dynamic iOS SDK.

webrtc/build/ios/build_ios_libs.sh

 #!/bin/bash
 
 #  Copyright 2015 The WebRTC project authors. All Rights Reserved.
 #
 #  Use of this source code is governed by a BSD-style license
 #  that can be found in the LICENSE file in the root of the source
 #  tree. An additional intellectual property rights grant can be found
 #  in the file PATENTS.  All contributing project authors may
 #  be found in the AUTHORS file in the root of the source tree.
 
-# Generates static FAT libraries for ios in out_ios_libs.
+# Generates static or dynamic FAT libraries for ios in out_ios_libs.
 
 # Exit on errors.
 set -e
 
 # Globals.
 SCRIPT_DIR=$(cd $(dirname $0) && pwd)
 WEBRTC_BASE_DIR=${SCRIPT_DIR}/../../..
 GYP_WEBRTC_SCRIPT=${WEBRTC_BASE_DIR}/webrtc/build/gyp_webrtc.py
-EXPORT_HEADERS_SCRIPT=${SCRIPT_DIR}/export_headers.py
 MERGE_SCRIPT=${SCRIPT_DIR}/merge_ios_libs.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 export headers script.
-  if [[ ! -x ${EXPORT_HEADERS_SCRIPT} ]]; then
-    echo "Failed to find export headers script." >&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=$4
+
   local ninja_output_dir=${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 legacy."
+    gyp_file=webrtc/build/ios/merge_ios_libs.gyp
+    gyp_target=libjingle_peerconnection_objc_no_op
+    override_visibility=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} use_objc_h264=1 \
-clang_xcode=1 ios_override_visibility=1"
+clang_xcode=1 ios_deployment_target=8.0 \
+ios_override_visibility=${override_visibility}"
   export GYP_GENERATORS="ninja"
   export GYP_GENERATOR_FLAGS="output_dir=${ninja_output_dir}"
 
   # GYP generation requires relative path for some reason.
   pushd ${WEBRTC_BASE_DIR}
-  ${GYP_WEBRTC_SCRIPT} webrtc/build/ios/merge_ios_libs.gyp
+  webrtc/build/gyp_webrtc.py ${gyp_file}
   popd
-  if [[ ${USE_LEGACY_API} -eq 1 ]]; then
-    ninja -C ${ninja_output_dir}/${flavor} libjingle_peerconnection_objc_no_op
-  else
-    ninja -C ${ninja_output_dir}/${flavor} webrtc_api_objc_no_op
+  # 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 ${ninja_output_dir}/${flavor}/*.a
+  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] [-c] [-o]"
+  echo "Usage: $0 [-h] [-b build_type] [-c] [-o output_dir]"
   echo "  -h Print this help."
+  echo "  -b The build type. Can be framework, static_only or legacy."
+  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
 }
 
 check_preconditions
 
 # Set default arguments.
 # Output directory for build artifacts.
 OUTPUT_DIR=${WEBRTC_BASE_DIR}/out_ios_libs
-# Flag to build the new or legacy version of the API.
-USE_LEGACY_API=0
+# The type of build to perform. Valid arguments are framework, static_only and
+# legacy.
+BUILD_TYPE="framework"
 PERFORM_CLEAN=0
+FLAVOR="Profile"
+POINT_VERSION="0"
 
 # Parse arguments.
-while getopts "hco:" opt; do
+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 "${archs[@]}"
+ARCHS=( "arm" "arm64" "ia32" "x64" )
+for ARCH in "${ARCHS[@]}"
 do
-  echo "Building WebRTC arch: ${arch}"
-  build_webrtc ${OUTPUT_DIR} "Profile" $arch
+  echo "Building WebRTC arch: ${ARCH}"
+  build_webrtc ${OUTPUT_DIR} ${FLAVOR} $ARCH ${BUILD_TYPE}
 done
 
-# Export header files.
-${EXPORT_HEADERS_SCRIPT} ${OUTPUT_DIR} ${USE_LEGACY_API}
+ARM_NINJA_DIR=${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
 
-# Merge the libraries together.
-${MERGE_SCRIPT} ${OUTPUT_DIR}
+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}/WebRTC.framework/WebRTC
+  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}
+  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=${OUTPUT_DIR}/WebRTC.framework/Resources/Info.plist
+  MAJOR_MINOR=$(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
+else
+  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"
+  if [[ ${BUILD_TYPE} = "legacy" ]]; then
+    TARGET_NAME="libjingle_peerconnection_objc_no_op"
+  fi
+  DSYM_PATH="${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
+  if [[ ${BUILD_TYPE} = "legacy" ]]; then
+    INPUT_HEADER_DIR="${WEBRTC_BASE_DIR}/talk/app/webrtc/objc/public"
+    ln -sf ${INPUT_HEADER_DIR} ${OUTPUT_HEADER_DIR}
+  else
+    mkdir -p ${OUTPUT_HEADER_DIR}
+    ln -sf ${INPUT_HEADER_DIR} ${OUTPUT_HEADER_DIR}/WebRTC
+  fi
+fi
+
+echo "Done!"