ndk

#! /bin/sh
api=21
arch=armv7a
ndk=${NDK:-/path-to-the/ndk}
src=${SRC:-$(realpath $(dirname "$0"))}
out=${OUT:-.}

set -e
test -e "$src/configure" ||
	test -r "$src/configure.ac" && autoreconf "$src" || :
while :; do
	case $1 in
	aarch64|armv7a|i686|x86_64) arch=$1;;
	[1-9][0-9]|[1-9])	api=$1;;
	*/android-ndk-*)	ndk=$1;;
	*=*)	eval "$1";;
	*) break;;
	esac
	shift
done
case $arch in
armv7a) eabi=eabi;;
*) eabi=;;
esac
die(){ echo >&2 "$@"; exit 1; }
test -d "$ndk" || die not a directory: "$ndk"
tc=$(realpath "$ndk/toolchains/llvm/prebuilt/linux-x86_64")
cc=$tc/bin/$arch-linux-android$eabi$api-clang
test -x "$cc" || die not an executable: "$cc"
strip=$tc/bin/llvm-strip
test -x "$strip" || die not an executable: "$strip"
case $1 in
configure)
	CC=$cc STRIP=$strip exec "$src/$1" --host="$arch-linux-android$api" ;;
cc)
	shift; "$cc" "$@" ;;
*)
	exec > "$out/android-$arch-$api-LOG"
	ls "$tc" "$cc" "$strip"
	set
	echo 'int main(){}' | "$cc" -xc - -o "$out/android-$arch-$api"
	;;
esac