A script to run `./configure` for various iOS devices. Lightly tested and WorksForMe™.

configure.ios

#!/bin/sh -x -e

case "$ARCH" in
    armv6-apple-darwin10|armv7-apple-darwin10|armv7s-apple-darwin10|arm64-apple-darwin10|i386-apple-darwin11)
        ;;
    *)
        cat <<EOF
Must set ARCH environment variable to

armv6-apple-darwin10 = All iOS devices
armv7-apple-darwin10 = All except iPhone 1st, iPhone 3G, iPod Touch 1st, iPod Touch 2nd
armv7s-apple-darwin10 = iPhone 5, iPhone 5c, iPhone 5S, iPad 4th, iPad Air, iPad Mini 2nd
arm64-apple-darwin10 = iPhone 5s, iPad Air, iPad Mini 2nd
i386-apple-darwin11 = iPhone Simulator

See <http://en.wikipedia.org/wiki/List_of_iOS_devices#Features> and search for the architecture name for a comprehensive list.
EOF
        exit 2
        ;;
esac

clang="/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang"
clangxx="${clang}++"
optflags=${OPTFLAGS:--Os}

case $ARCH in
    i386-apple-darwin11)
        sdk="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk"
        ;;
    *)
        sdk="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk"
        ;;
esac

IPHONEOS_DEPLOYMENT_TARGET=${IPHONEOS_DEPLOYMENT_TARGET:-7.0}
export IPHONEOS_DEPLOYMENT_TARGET

CC="$clang"
CPP="$clang -E"
export CC CPP

CXX="$clangxx"
CXXCPP="$clangxx -E"
export CXX CXXCPP

CFLAGS="-target $ARCH --sysroot=$sdk $optflags -mios-version-min=$IPHONEOS_DEPLOYMENT_TARGET"
CPPFLAGS="$CFLAGS"
CXXFLAGS="$CFLAGS -stdlib=libc++"
LDFLAGS="$CFLAGS -dead_strip"
export CFLAGS CPPFLAGS CXXFLAGS LDFLAGS

case $ARCH in
    arm64-apple-darwin10)
        host=aarch64-apple-darwin10
        ;;
    *)
        host=$ARCH
        ;;
esac

${CONFIGURE:-./configure} --host="$host" --disable-shared --disable-dependency-tracking "$@"