compile_libzmq_ios_universal

#!/usr/bin/env bash

#
# Compile libzmq as iOS universal (fat) static library
# Supported architectures; armv7, armv7s, arm64, i386
#
# Created by Sam de Freyssinet 
#
# Licensed under ISC License 
# http://opensource.org/licenses/ISC
# For full terms please read LICENSE included with this
# project
#
# Please read the README.md file for use and more information 
#
# Project hosted on Github http://github.com/samsoir/libzmq-ios-universal
#
# Copyright (c) 2012 Sam de Freyssinet, some rights reserved
#

# NOTE:
# There will be an error before compiling ARM codes:
#   configure: error: C preprocessor "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cpp" fails sanity check
# You have to modify file (change the SDK version number if need)
#   /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk/usr/include/sys/cdefs.h
# and remove the following line (around the end of file)
#   #error Unsupported architecture
# before compile. (You can add back later)

set -e
# set -x # show executed command

CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
GLOBAL_OUTDIR=$CURRENT_DIR/dependencies
BUILD_DIR=$CURRENT_DIR/build
LIBZMQ_DIR=$CURRENT_DIR/zeromq
LIBZMQ_FILE="libzmq.a"
LIBZMQ_ARMV7_PREFIX="armv7"
LIBZMQ_ARMV7S_PREFIX="armv7s"
LIBZMQ_ARM64_PREFIX="arm64"
LIBZMQ_I686_PREFIX="i386"
LIBZMQ_UNIVERSAL_FILE="libzmq.a"
LIBZMQ_UNIVERSAL_PREFIX="universal"
ZMQ_BUILD_LOG_FILE=$BUILD_DIR/build.log
IOS_BASE_SDK="7.0"
IOS_DEPLOY_TARGET="4.0"
VERSION_NUMBER="5.0.0" # Xcode 5

print_help_text ()
{
  cat << EOF
Usage: $0 [options]

Build libzmq as an iOS Universal (fat) static library
for use with the iOS Simulator (i386) and iOS device
(armv7, armv7s) architectures.

Options:
  -h     show this message and exit
  -v     show version number and exit
  -l     libzmq configure autoconf location. e.g. /tmp/zeromq-3.2.2
         If not supplied assumes ${LIBZMQ_DIR}

Requires:
  libzmq 3.2.2 or later, plus libzmq required libraries
  listed on zeromq download page http://www.zeromq.org/area:download

  Xcode 4.3.3 or later, to discover your version type;
  "xcodebuild -version"

EOF
  exit 1
}

print_version_number ()
{
  echo "$0 version ${VERSION_NUMBER}"
  echo "Copyright (c) 2012 Sam de Freyssinet, same rights reserved"
  exit 0
}

copy_zmq_headers ()
{
  echo "Copying libzmq headers into universal library..."
  mkdir -p ${BUILD_DIR}/${LIBZMQ_UNIVERSAL_PREFIX}/include
  cp -R ${LIBZMQ_DIR}/include ${BUILD_DIR}/${LIBZMQ_UNIVERSAL_PREFIX}
}

create_universal_library ()
{
  echo "Creating universal static library"
  
  mkdir -p ${BUILD_DIR}/${LIBZMQ_UNIVERSAL_PREFIX}/lib

  lipo -create "${BUILD_DIR}/${LIBZMQ_ARMV7_PREFIX}/lib/${LIBZMQ_FILE}" "${BUILD_DIR}/${LIBZMQ_ARMV7S_PREFIX}/lib/${LIBZMQ_FILE}" "${BUILD_DIR}/${LIBZMQ_ARM64_PREFIX}/lib/${LIBZMQ_FILE}" "${BUILD_DIR}/${LIBZMQ_I686_PREFIX}/lib/${LIBZMQ_FILE}" -output "${BUILD_DIR}/${LIBZMQ_UNIVERSAL_PREFIX}/lib/${LIBZMQ_FILE}"

  copy_zmq_headers
}

clean_build_dir ()
{
  echo "Initializing build directory..."
  if [[ -d ${BUILD_DIR} ]]; then
    rm -rf ${BUILD_DIR}
  fi
}

clean_dependency_dir ()
{
  echo "Initializing dependency directory..."
  if [[ -d ${GLOBAL_OUTDIR} ]]; then
    rm -rf ${GLOBAL_OUTDIR}
  fi

  mkdir -p ${GLOBAL_OUTDIR}/include ${GLOBAL_OUTDIR}/lib 
}

tidy_up ()
{
  echo "Tidying up..."
  cd ${LIBZMQ_DIR}
  make distclean >> ${ZMQ_BUILD_LOG_FILE}
  cd ${CURRENT_DIR}
}

setenv_all ()
{
  export CPP=`xcrun -find cpp`
  export CC=`xcrun -find clang`
  export CXXCPP=`xcrun -find cpp`
  export CXX=`xcrun -find clang++`

  export AR=`xcrun -find ar`
  export AS=`xcrun -find as`
  export LD=`xcrun -find ld`
  export LDFLAGS="-L${SDKROOT}/usr/lib"
  export LIBTOOL=`xcrun -find libtool`
  export STRIP=`xcrun -find strip`
  export RANLIB=`xcrun -find ranlib`

  export CFLAGS="${CFLAGS}" # -I${GLOBAL_OUTDIR}/include -L${GLOBAL_OUTDIR}/lib"
  export CXXFLAGS=${CFLAGS}
}

setenv_iphone ()
{
  unset BUILD_HOST DEVROOT SDKROOT CFLAGS CC LD CPP CXX AR AS NM RANLIB LDFLAGS CXXFLAGS

  export ARCH=$1
  export DEVROOT="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer"
  export SDKROOT=${DEVROOT}/SDKs/iPhoneOS${IOS_BASE_SDK}.sdk
  export CFLAGS="-arch ${ARCH} -pipe -no-cpp-precomp -isysroot ${SDKROOT} -miphoneos-version-min=${IOS_DEPLOY_TARGET} -I{$SDKROOT}/usr/include/"
  export BUILD_HOST="arm-apple-darwin"

  setenv_all
}

setenv_simulator ()
{
  unset BUILD_HOST DEVROOT SDKROOT CFLAGS CC LD CPP CXX AR AS NM RANLIB LDFLAGS CXXFLAGS

  export ARCH=$1
  export DEVROOT="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer"
  export SDKROOT=${DEVROOT}/SDKs/iPhoneSimulator${IOS_BASE_SDK}.sdk
  export CFLAGS="-arch ${ARCH} -pipe -no-cpp-precomp -isysroot ${SDKROOT} -miphoneos-version-min=${IOS_DEPLOY_TARGET} -I${SDKROOT}/usr/include/"
  export BUILD_HOST="i686-apple-darwin"

  setenv_all
}

compile_iphone ()
{
  echo "Compiling libzmq for "$1"..."
  mkdir -p ${BUILD_DIR}/$1
  setenv_iphone $1
  compile_zmq $1
}

compile_simulator ()
{
  echo "Compiling libzmq for "$1"..."
  mkdir -p ${BUILD_DIR}/$1
  setenv_simulator $1
  compile_zmq $1
}

compile_zmq ()
{
  cd ${LIBZMQ_DIR}

  ./configure --disable-dependency-tracking --enable-static --disable-shared --host=${BUILD_HOST} --prefix=${BUILD_DIR}/$1 >> ${ZMQ_BUILD_LOG_FILE}

  make >> ${ZMQ_BUILD_LOG_FILE}
  make install >> ${ZMQ_BUILD_LOG_FILE}
  make clean >> ${ZMQ_BUILD_LOG_FILE}
  lipo -info ${BUILD_DIR}/$1/lib/libzmq.a
}

print_completion_text ()
{
  cat << EOF
Finished compiling libzmq as a static library for iOS.

Universal library can be found in build/universal;
  "lib" folder contains "libzmq.a" static library
  "include" folder contains headers

To use in your project follow linking instructions
available on the iOS zeromq page
http://www.zeromq.org/build:iphone

EOF
}

begin_compile ()
{
  clean_build_dir
  clean_dependency_dir

  compile_iphone ${LIBZMQ_ARMV7_PREFIX}
  compile_iphone ${LIBZMQ_ARMV7S_PREFIX}
  compile_iphone ${LIBZMQ_ARM64_PREFIX}
  compile_simulator ${LIBZMQ_I686_PREFIX}
  create_universal_library

  tidy_up

  print_completion_text

  exit 0
}

print_unable_to_find_libzmq ()
{
  echo "Unable to locate libzmq in ${LIBZMQ_DIR}"
  exit 1
}

verify_libzmq_location ()
{
  if [[ ! -f "${LIBZMQ_DIR}/configure" ]] || [[ ! -f "${LIBZMQ_DIR}/zeromq.spec" ]]; then
    print_unable_to_find_libzmq
  fi
}

while getopts ":hvl:" OPTION
do
  case ${OPTION} in
    h)
      print_help_text
      ;;
    v)
      print_version_number
      ;;
    l)
      LIBZMQ_DIR=${OPTARG}
      ;;
  esac
done

verify_libzmq_location
begin_compile