build-libiconv

#!/bin/bash
set -e
# set -x

help_text() {
    echo "Usage:
  ${0##*/} [-h] --host=... --prefix=... [--version=X.Y] [target1 target2 target3]

  where targetN is e.g. aarch64-linux-android. If no targets are given
  will build for aarch64-linux-android and arm-linux-androideabi.

Options:

  -h, --help
    display this help and exit

  --host=<host>
    the build host (e.g. darwin-x86_64)

  --prefix=<prefix>
    the prefix to pass to configure

  --version=<version>
    the libiconv version to build. Defaults to 1.15"
}

version=1.15

while [ "$#" -gt 0 ]; do
    case "$1" in
        --prefix=*) prefix="${1#*=}"; shift 1;;
        --host=*) host="${1#*=}"; shift 1;;
        --version=*) version="${1#*=}"; shift 1;;
        -h|--help) help_text; exit;;
        -*) echo "unknown option: $1" >&2; exit 1;;
        *) args+="$1"; shift 1;;
    esac
done

if [ -z $host ]; then
    echo "no --host given" >&2
    exit 1
fi
if [ -z $prefix ]; then
    echo "no --prefix given" >&2
    exit 1
fi


TARGETS=${args:-"aarch64-linux-android arm-linux-androideabi"}


if [ ! -f libiconv-$version.tar.gz ]; then
    curl -O -L https://ftp.gnu.org/pub/gnu/libiconv/libiconv-$version.tar.gz
fi
tar xzf libiconv-$version.tar.gz
cd libiconv-$version
for target in $TARGETS; do
    # extract the arch as the first component of the target triple
    arch="${target%%-*}"
    # rewrite aarch64 -> arm64; this is such a mess...
    if [ "$arch" == "aarch64" ]; then arch=arm64; fi

    ANDROID_HOST=$target
    ANDROID_BUILD=$host
    ANDROID_ARCH=$arch
    ANDROID_NDK=$HOME/Library/Android/sdk/ndk-bundle
    ANDROID_VERSION=24
    ANDROID_TOOLCHAIN_VERSION=4.9
    case "$arch" in
        x86*) ANDROID_TOOLCHAIN=$arch-$ANDROID_TOOLCHAIN_VERSION ;;
        *)    ANDROID_TOOLCHAIN=$target-$ANDROID_TOOLCHAIN_VERSION ;;
    esac
    ANDROID_SYSROOT=$ANDROID_NDK/platforms/android-$ANDROID_VERSION/arch-$ANDROID_ARCH
    CFLAGS=--sysroot=$ANDROID_SYSROOT
    #export CPP=$ANDROID_HOST-gcc -E
    CPPFLAGS=--sysroot=$ANDROID_SYSROOT
    AR=$ANDROID_HOST-ar
    RANLIB=$ANDROID_HOST-ranlib
    PATH=$ANDROID_NDK/toolchains/$ANDROID_TOOLCHAIN/prebuilt/$ANDROID_BUILD/bin:$PATH
    if [ -f Makefile ]; then
        echo "Cleaning up build folder..."
        make clean --silent
    fi
    echo "Configuring $target..."
    CFLAGS=$CFLAGS CPPFLAGS=$CPPFLAGS AR=$AR RANLIB=$RANLIB PATH=$PATH \
          ./configure --prefix=$prefix/$target --host=$ANDROID_HOST \
                      --with-sysroot=$ANDROID_SYSROOT --silent \
                      --enable-shared=no --enable-static=yes
    echo "Building $target"
    CFLAGS=$CFLAGS CPPFLAGS=$CPPFLAGS AR=$AR RANLIB=$RANLIB PATH=$PATH \
          make -j --silent
    echo "Installing $target..."
    make --silent install
done