#!/bin/sh

usage()
{
    echo "Use environment variables to pass values:
    CC         - compiler (default: cc)
    CFLAGS     - flags for compiler
    LDFLAGS    - flags for linker
    DESTDIR    - path to make install (default: /usr/local)"
    exit 1
}

while test $# -gt 0; do
    case "$1" in
        -h) usage
            ;;
        --help) usage
            ;;
    esac
    shift
done

CC=${CC:-cc}
CFLAGS=${CFLAGS:-}
LDFLAGS=${LDFLAGS:-}
DESTDIR=${DESTDIR:-/usr/local}

echo "Configuration:
    Compiler: $CC
    CFLAGS: $CFLAGS
    LDFLAGS: $LDFLAGS
    DESTDIR: $DESTDIR"

echo "
DESTDIR=$DESTDIR
" > config.mk