Scripts for building Gdal into a static library for iOS, build-gdal-combined-lib.sh will build a single lib with armv7 armv7s arm64 and simulator slices

build-gdal-combined-lib.sh

#!/bin/bash
PREFIX=`pwd`/install/
rm -rf $PREFIX
mkdir $PREFIX
LOG=./log
rm -rf $LOG
mkdir $LOG

if [ -e ${PREFIX} ]
then
	echo removing ${PREFIX}
	rm -rf ${PREFIX}
fi

mkdir ${PREFIX}

for f in "armv7" "armv7s" "arm64"; do
echo Building $f
./build_gdal_ios.sh -p ${PREFIX} -a $f device 2>&1 | tee "${LOG}/${f}.txt"
done

echo Building simulator
for f in "i386" "x86_64"; do
echo Building $f
./build_gdal_ios.sh -p ${PREFIX} -a $f simulator 2>&1 | tee "${LOG}/simulator.txt"
done


SDK_VERSION=8.3

lipo \
${PREFIX}/i386/iphonesimulator${SDK_VERSION}.sdk/lib/libgdal.a \
${PREFIX}/x86_64/iphonesimulator${SDK_VERSION}.sdk/lib/libgdal.a \
${PREFIX}/armv7/iphoneos${SDK_VERSION}.sdk/lib/libgdal.a \
${PREFIX}/armv7s/iphoneos${SDK_VERSION}.sdk/lib/libgdal.a \
${PREFIX}/arm64/iphoneos${SDK_VERSION}.sdk/lib/libgdal.a \
-output ${PREFIX}/libgdal.a \
-create | tee $LOG/lipo.txt

lipo \
${PREFIX}/i386/iphonesimulator${SDK_VERSION}.sdk/lib/libproj.a \
${PREFIX}/x86_64/iphonesimulator${SDK_VERSION}.sdk/lib/libproj.a \
${PREFIX}/armv7/iphoneos${SDK_VERSION}.sdk/lib/libproj.a \
${PREFIX}/armv7s/iphoneos${SDK_VERSION}.sdk/lib/libproj.a \
${PREFIX}/arm64/iphoneos${SDK_VERSION}.sdk/lib/libproj.a \
-output ${PREFIX}/libproj.a \
-create | tee $LOG/lipo-proj.txt

#create zipfile for cocoapods distribution
cd ${PREFIX}
mkdir GDAL
cp libgdal.a ${PREFIX}/libproj.a GDAL
cp arm64/iphoneos8.3.sdk/include/*.h GDAL
zip gdal.zip GDAL/*

build_gdal_ios.sh

#!/bin/bash
set -u

default_iphoneos_version=8.3
default_architecture=armv7

export IPHONEOS_DEPLOYMENT_TARGET="${IPHONEOS_DEPLOYMENT_TARGET:-$default_iphoneos_version}"
DEFAULT_ARCHITECTURE="${DEFAULT_ARCHITECTURE:-$default_architecture}"
DEFAULT_PREFIX="${HOME}/Desktop/iOS_GDAL"


usage ()
    {
cat >&2 << EOF
    Usage: ${0} [-h] [-p prefix] [-a arch] target [configure_args]
        -h  Print help message
        -p  Installation prefix (default: \$HOME/Documents/iOS_GDAL...)
        -a  Architecture target for compilation (default: armv7)

    The target must be "device" or "simulator".  Any additional arguments
    are passed to configure.

    The following environment variables affect the build process:

        IPHONEOS_DEPLOYMENT_TARGET  (default: $default_iphoneos_version)
        DEFAULT_PREFIX  (default: $default_prefix)
EOF
    }

prefix="${DEFAULT_PREFIX}"

while getopts ":hp:a:" opt; do
        case $opt in
        h  ) usage ; exit 0 ;;
        p  ) prefix="$OPTARG" ;;
        a  ) DEFAULT_ARCHITECTURE="$OPTARG" ;;
        \? ) usage ; exit 2 ;;
        esac
done
shift $(( $OPTIND - 1 ))

if (( $# < 1 )); then
    usage
    exit 2
fi

target=$1
shift

case $target in

        device )
        arch="${DEFAULT_ARCHITECTURE}"
        platform=iphoneos
        extra_cflags=" "
        ;;

        simulator )
        arch="${DEFAULT_ARCHITECTURE}"
        platform=iphonesimulator
        extra_cflags="-D__IPHONE_OS_VERSION_MIN_REQUIRED=${IPHONEOS_DEPLOYMENT_TARGET%%.*}0000"
        ;;

        * )
        echo No target found!!!
        usage
        exit 2

esac
if [ $arch = "arm64" ]
    then
    host="arm-apple-darwin"
else
    host="${arch}-apple-darwin"
fi

echo "building for host ${host}"

platform_dir=`xcrun -find -sdk ${platform} --show-sdk-platform-path`
platform_sdk_dir=`xcrun -find -sdk ${platform} --show-sdk-path`
prefix="${prefix}/${arch}/${platform}${IPHONEOS_DEPLOYMENT_TARGET}.sdk"

echo
echo library will be exported to $prefix

#setup compiler flags
export CC=`xcrun -find -sdk iphoneos gcc`
export CFLAGS="-Wno-error=implicit-function-declaration -arch ${arch} -pipe -Os -gdwarf-2 -isysroot ${platform_sdk_dir} ${extra_cflags}"
export LDFLAGS="-arch ${arch} -isysroot ${platform_sdk_dir}"
export CXX=`xcrun -find -sdk iphoneos g++`
export CXXFLAGS="${CFLAGS}"
export CPP=`xcrun -find -sdk iphoneos cpp`
export CXXCPP="${CPP}"

echo CFLAGS ${CFLAGS}

#set proj4 install destination
proj_prefix=$prefix
echo install proj to $proj_prefix

#download proj4 if necesary
if [ ! -e proj-4.8.0 ]
then
    echo proj4 missing, downloading
    curl -L http://download.osgeo.org/proj/proj-4.8.0.tar.gz > proj-4.8.0.tar.gz
    tar -xzf proj-4.8.0.tar.gz
fi

#configure and build proj4
pushd proj-4.8.0

echo
echo "cleaning proj"
make clean

echo
echo "configure proj"
./configure \
    --prefix=${proj_prefix} \
    --enable-shared=no \
    --enable-static=yes \
    --host=$host \
    "$@" || exit

echo
echo "make install proj"
time make install || exit

popd

#download gdal if necesary
if [ ! -e gdal-1.11.2 ]
then
    curl -L http://download.osgeo.org/gdal/1.11.2/gdal-1.11.2.tar.gz > gdal-1.11.2.tar.gz
    tar -xzf gdal-1.11.2.tar.gz
fi

#configure and build gdal
cd gdal-1.11.2

echo "cleaning gdal"
make clean

echo
echo "configure gdal"
./configure \
    --prefix="${prefix}" \
    --host=$host \
    --disable-shared \
    --enable-static \
    --with-hide-internal-symbols \
    --with-unix-stdio-64=no \
    --with-geos=no \
    --without-pg \
    --without-grass \
    --without-libgrass \
    --without-cfitsio \
    --without-pcraster \
    --without-netcdf \
    --without-ogdi \
    --without-fme \
    --without-hdf4 \
    --without-hdf5 \
    --without-jasper \
    --without-kakadu \
    --without-grib \
    --without-mysql \
    --without-ingres \
    --without-xerces \
    --without-odbc \
    --without-curl \
    --without-idb \
    --without-sde \
    --with-sse=no \
    --with-avx=no \
    --with-static-proj4=${prefix} \
    --with-sqlite3=${platform_sdk_dir} \
    || exit

#echo '#include "cpl_config_extras.h"' >> port/cpl_config.h

echo
echo "building gdal"
time make -j8

echo
echo "installing"
time make install

echo "Gdal build complete"

1. use curl rather than wget, since Mac does not have wget anymore.
2. correct download URL of goal, original one is wrong
3. use make -j8

Thank you for share the scripts. I am trying to build libgdal.a from gdal 2.1.1 but it is not working. Do you know why?