#===============================================================================

# Filename:  boost.sh

# Author:    Pete Goodliffe

# Copyright: (c) Copyright 2009 Pete Goodliffe

# Licence:   Please feel free to use this, with attribution

#===============================================================================

#

# Builds a Boost framework for the iPhone.

# Creates a set of universal libraries that can be used on an iPhone and in the

# iPhone simulator. Then creates a pseudo-framework to make using boost in Xcode

# less painful.

#

# To configure the script, define:

#    BOOST_LIBS:        which libraries to build

#    BOOST_VERSION:     version number of the boost library (e.g. 1_41_0)

#    IPHONE_SDKVERSION: iPhone SDK version (e.g. 3.0)

#

# Then go get the source tar.bz of the boost you want to build, shove it in the

# same directory as this script, and run "./boost.sh". Grab a cuppa. And voila.

#===============================================================================

: ${BOOST_VERSION:=1_44_0}

: ${BOOST_LIBS:="thread signals filesystem regex program_options system"}

: ${IPHONE_SDKVERSION:=4.2}

: ${EXTRA_CPPFLAGS:="-DBOOST_AC_USE_PTHREADS -DBOOST_SP_USE_PTHREADS"}

# The EXTRA_CPPFLAGS definition works around a thread race issue in

# shared_ptr. I encountered this historically and have not verified that

# the fix is no longer required. Without using the posix thread primitives

# an invalid compare-and-swap ARM instruction (non-thread-safe) was used for the

# shared_ptr use count causing nasty and subtle bugs.

#

# Should perhaps also consider/use instead: -BOOST_SP_USE_PTHREADS

: ${TARBALLDIR:=`pwd`}

: ${SRCDIR:=`pwd`/src}

: ${BUILDDIR:=`pwd`/build}

: ${PREFIXDIR:=`pwd`/prefix}

: ${FRAMEWORKDIR:=`pwd`/framework}

BOOST_TARBALL=$TARBALLDIR/boost_$BOOST_VERSION.tar.bz2

    BOOST_SRC=$SRCDIR/boost_${BOOST_VERSION}

#===============================================================================

ARM_DEV_DIR=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/

SIM_DEV_DIR=/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/

ARM_COMBINED_LIB=$BUILDDIR/lib_boost_arm.a

SIM_COMBINED_LIB=$BUILDDIR/lib_boost_x86.a

#===============================================================================

echo "BOOST_VERSION:     $BOOST_VERSION"

echo "BOOST_LIBS:        $BOOST_LIBS"

echo "BOOST_TARBALL:     $BOOST_TARBALL"

echo "BOOST_SRC:         $BOOST_SRC"

echo "BUILDDIR:          $BUILDDIR"

echo "PREFIXDIR:         $PREFIXDIR"

echo "FRAMEWORKDIR:      $FRAMEWORKDIR"

echo "IPHONE_SDKVERSION: $IPHONE_SDKVERSION"

echo

#===============================================================================

# Functions

#===============================================================================

abort()

{

    echo

    echo "Aborted: $@"

    exit 1

}

doneSection()

{

    echo

    echo "    ================================================================="

    echo "    Done"

    echo

}

#===============================================================================

cleanEverythingReadyToStart()

{

    echo Cleaning everything before we start to build...

    rm -rf $BOOST_SRC

    rm -rf $BUILDDIR

    rm -rf $PREFIXDIR

    rm -rf $FRAMEWORKDIR

    doneSection

}

#===============================================================================

unpackBoost()

{

    echo Unpacking boost into $SRCDIR...

    [ -d $SRCDIR ]    || mkdir -p $SRCDIR

    [ -d $BOOST_SRC ] || ( cd $SRCDIR; tar xfj $BOOST_TARBALL )

    [ -d $BOOST_SRC ] && echo "    ...unpacked as $BOOST_SRC"

    doneSection

}

#===============================================================================

writeBjamUserConfig()

{

    # You need to do this to point bjam at the right compiler

    # ONLY SEEMS TO WORK IN HOME DIR GRR

    echo Writing usr-config

    #mkdir -p $BUILDDIR

    #cat > ~/user-config.jam <<EOF

    cat >> $BOOST_SRC/tools/build/v2/user-config.jam <<EOF

using darwin : 4.2.1~iphone

   : /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 -arch armv7 -mthumb -fvisibility=hidden -fvisibility-inlines-hidden $EXTRA_CPPFLAGS

   : <striper>

   : <architecture>arm <target-os>iphone

   ;

using darwin : 4.2.1~iphonesim

   : /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 -arch i386 -fvisibility=hidden -fvisibility-inlines-hidden $EXTRA_CPPFLAGS

   : <striper>

   : <architecture>x86 <target-os>iphone

   ;

EOF

    doneSection

}

#===============================================================================

inventMissingHeaders()

{

    # These files are missing in the ARM iPhoneOS SDK, but they are in the simulator.

    # They are supported on the device, so we copy them from x86 SDK to a staging area

    # to use them on ARM, too.

    echo Invent missing headers

    cp /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator${IPHONE_SDKVERSION}.sdk/usr/include/{crt_externs,bzlib}.h $BOOST_SRC

}

#===============================================================================

bootstrapBoost()

{

    cd $BOOST_SRC

    BOOST_LIBS_COMMA=$(echo $BOOST_LIBS | sed -e "s/ /,/g")

    echo "Bootstrapping (with libs $BOOST_LIBS_COMMA)"

    ./bootstrap.sh --with-libraries=$BOOST_LIBS_COMMA

    doneSection

}

#===============================================================================

buildBoostForiPhoneOS_1_44_0()

{

    cd $BOOST_SRC

    ./bjam --prefix="$PREFIXDIR" toolset=darwin architecture=arm target-os=iphone macosx-version=iphone-${IPHONE_SDKVERSION} define=_LITTLE_ENDIAN link=static install

    doneSection

    ./bjam toolset=darwin architecture=x86 target-os=iphone macosx-version=iphonesim-${IPHONE_SDKVERSION} link=static stage

    doneSection

}

#===============================================================================

# $1: Name of a boost library to lipoficate (technical term)

lipoficate()

{

    : ${1:?}

    NAME=$1

    echo liboficate: $1

    ARMV6=$BOOST_SRC/bin.v2/libs/$NAME/build/darwin-4.2.1~iphone/release/architecture-arm/link-static/macosx-version-iphone-$IPHONE_SDKVERSION/target-os-iphone/threading-multi/libboost_$NAME.a

    I386=$BOOST_SRC/bin.v2/libs/$NAME/build/darwin-4.2.1~iphonesim/release/architecture-x86/link-static/macosx-version-iphonesim-$IPHONE_SDKVERSION/target-os-iphone/threading-multi/libboost_$NAME.a

    mkdir -p $PREFIXDIR/lib

    lipo \

        -create \

        "$ARMV6" \

        "$I386" \

        -o          "$PREFIXDIR/lib/libboost_$NAME.a" \

    || abort "Lipo $1 failed"

}

# This creates universal versions of each individual boost library

lipoAllBoostLibraries()

{

    for i in $BOOST_LIBS; do lipoficate $i; done;

    doneSection

}

scrunchAllLibsTogetherInOneLibPerPlatform()

{

    ALL_LIBS_ARM=""

    ALL_LIBS_SIM=""

    for NAME in $BOOST_LIBS; do

        ALL_LIBS_ARM="$ALL_LIBS_ARM $BOOST_SRC/bin.v2/libs/$NAME/build/darwin-4.2.1~iphone/release/architecture-arm/link-static/macosx-version-iphone-$IPHONE_SDKVERSION/target-os-iphone/threading-multi/libboost_$NAME.a";

        ALL_LIBS_SIM="$ALL_LIBS_SIM $BOOST_SRC/bin.v2/libs/$NAME/build/darwin-4.2.1~iphonesim/release/architecture-x86/link-static/macosx-version-iphonesim-$IPHONE_SDKVERSION/target-os-iphone/threading-multi/libboost_$NAME.a";

    done;

    mkdir -p $BUILDDIR/armv6/obj

    mkdir -p $BUILDDIR/armv7/obj

    mkdir -p $BUILDDIR/i386/obj

    ALL_LIBS=""

    echo Splitting all existing fat binaries...

    for NAME in $BOOST_LIBS; do

        ALL_LIBS="$ALL_LIBS libboost_$NAME.a"

        lipo "$BOOST_SRC/bin.v2/libs/$NAME/build/darwin-4.2.1~iphone/release/architecture-arm/link-static/macosx-version-iphone-$IPHONE_SDKVERSION/target-os-iphone/threading-multi/libboost_$NAME.a" -thin armv6 -o $BUILDDIR/armv6/libboost_$NAME.a

        lipo "$BOOST_SRC/bin.v2/libs/$NAME/build/darwin-4.2.1~iphone/release/architecture-arm/link-static/macosx-version-iphone-$IPHONE_SDKVERSION/target-os-iphone/threading-multi/libboost_$NAME.a" -thin armv7 -o $BUILDDIR/armv7/libboost_$NAME.a

        cp "$BOOST_SRC/bin.v2/libs/$NAME/build/darwin-4.2.1~iphonesim/release/architecture-x86/link-static/macosx-version-iphonesim-$IPHONE_SDKVERSION/target-os-iphone/threading-multi/libboost_$NAME.a" $BUILDDIR/i386/

    done

    echo "Decomposing each architecture's .a files"

    for NAME in $ALL_LIBS; do

        echo Decomposing $NAME...

        (cd $BUILDDIR/armv6/obj; ar -x ../$NAME );

        (cd $BUILDDIR/armv7/obj; ar -x ../$NAME );

        (cd $BUILDDIR/i386/obj; ar -x ../$NAME );

    done

    echo "Linking each architecture into an uberlib ($ALL_LIBS => libboost.a )"

    rm $BUILDDIR/*/libboost.a

    echo ...armv6

    (cd $BUILDDIR/armv6; $ARM_DEV_DIR/ar crus libboost.a obj/*.o; )

    echo ...armv7

    (cd $BUILDDIR/armv7; $ARM_DEV_DIR/ar crus libboost.a obj/*.o; )

    echo ...i386

    (cd $BUILDDIR/i386;  $SIM_DEV_DIR/ar crus libboost.a obj/*.o; )

}

#===============================================================================

                    VERSION_TYPE=Alpha

                  FRAMEWORK_NAME=boost

               FRAMEWORK_VERSION=A

       FRAMEWORK_CURRENT_VERSION=$BOOST_VERSION

 FRAMEWORK_COMPATIBILITY_VERSION=$BOOST_VERSION

buildFramework()

{

    FRAMEWORK_BUNDLE=$FRAMEWORKDIR/$FRAMEWORK_NAME.framework

    rm -rf $FRAMEWORK_BUNDLE

    echo "Framework: Setting up directories..."

    mkdir -p $FRAMEWORK_BUNDLE

    mkdir -p $FRAMEWORK_BUNDLE/Versions

    mkdir -p $FRAMEWORK_BUNDLE/Versions/$FRAMEWORK_VERSION

    mkdir -p $FRAMEWORK_BUNDLE/Versions/$FRAMEWORK_VERSION/Resources

    mkdir -p $FRAMEWORK_BUNDLE/Versions/$FRAMEWORK_VERSION/Headers

    mkdir -p $FRAMEWORK_BUNDLE/Versions/$FRAMEWORK_VERSION/Documentation

    echo "Framework: Creating symlinks..."

    ln -s $FRAMEWORK_VERSION               $FRAMEWORK_BUNDLE/Versions/Current

    ln -s Versions/Current/Headers         $FRAMEWORK_BUNDLE/Headers

    ln -s Versions/Current/Resources       $FRAMEWORK_BUNDLE/Resources

    ln -s Versions/Current/Documentation   $FRAMEWORK_BUNDLE/Documentation

    ln -s Versions/Current/$FRAMEWORK_NAME $FRAMEWORK_BUNDLE/$FRAMEWORK_NAME

    FRAMEWORK_INSTALL_NAME=$FRAMEWORK_BUNDLE/Versions/$FRAMEWORK_VERSION/$FRAMEWORK_NAME

    echo "Lipoing library into $FRAMEWORK_INSTALL_NAME..."

    lipo \

        -create \

        -arch armv6 "$BUILDDIR/armv6/libboost.a" \

        -arch armv7 "$BUILDDIR/armv7/libboost.a" \

        -arch i386  "$BUILDDIR/i386/libboost.a" \

        -o          "$FRAMEWORK_INSTALL_NAME" \

    || abort "Lipo $1 failed"

    echo "Framework: Copying includes..."

    cp -r $PREFIXDIR/include/boost/*  $FRAMEWORK_BUNDLE/Headers/

    echo "Framework: Creating plist..."

    cat > $FRAMEWORK_BUNDLE/Resources/Info.plist <<EOF

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0">

<dict>

	<key>CFBundleDevelopmentRegion</key>

	<string>English</string>

	<key>CFBundleExecutable</key>

	<string>${FRAMEWORK_NAME}</string>

	<key>CFBundleIdentifier</key>

	<string>org.boost</string>

	<key>CFBundleInfoDictionaryVersion</key>

	<string>6.0</string>

	<key>CFBundlePackageType</key>

	<string>FMWK</string>

	<key>CFBundleSignature</key>

	<string>????</string>

	<key>CFBundleVersion</key>

	<string>${FRAMEWORK_CURRENT_VERSION}</string>

</dict>

</plist>

EOF

    doneSection

}

#===============================================================================

# Execution starts here

#===============================================================================

[ -f "$BOOST_TARBALL" ] || abort "Source tarball missing."

mkdir -p $BUILDDIR

case $BOOST_VERSION in

    1_44_0 )

        cleanEverythingReadyToStart

        unpackBoost

        inventMissingHeaders

        writeBjamUserConfig

        bootstrapBoost

        buildBoostForiPhoneOS_1_44_0

        scrunchAllLibsTogetherInOneLibPerPlatform

        lipoAllBoostLibraries

        buildFramework

        ;;

    default )

        echo "This version ($BOOST_VERSION) is not supported"

        ;;

esac

echo "Completed successfully"

#===============================================================================