configure

#!/usr/bin/env sh

DIR="$( cd "$( dirname "${0}" )" && pwd )"
prefix=/usr/local
debugsym=true
sanitizer=true

# Figure out project name:
project_name=$(basename $DIR)
if [ -f "PROJECT.name" ]; then
    project_name=$(cat "PROJECT.name")
else
    echo "Warning: no file 'PROJECT.name' found, guessing project name: '${project_name}'"
fi


for arg in "$@"; do
    case "$arg" in
    --prefix=*)
        prefix=`echo $arg | sed 's/--prefix=//'`
        ;;

    --enable-debug )
        debugsym=true
        ;;
    --disable-debug )
        debugsym=false
        ;;

    --enable-sanitizer )
        sanitizer=true
        ;;
    --disable-sanitizer )
        sanitizer=false
        ;;

    --help)
        echo 'usage: ./configure [options]'
        echo 'options:'
        echo '  --prefix=<path>: installation prefix'
        echo '  --enable-debug include debug symbols'
        echo '  --disable-debug do not include debug symbols'
        echo '  --enable-sanitizer To enable -fsanitize compiler option'
        echo '  --disable-sanitizer To disable -fsanitize compiler option'
        echo ''
        echo 'all invalid options are silently ignored'
        exit 0
        ;;

    *)
        echo "Unexpected option '$arg'"
        exit 0
        ;;
    esac
done

echo "Generating Makefile for ${project_name}..."
echo "# Generated Makefile for ${project_name}: $(date)" > Makefile
echo "PREFIX ?= ${prefix}" >> Makefile
echo "PROJECT ?= ${project_name}" >> Makefile


if $debugsym; then
    echo 'dbg = -g' >> Makefile
fi

if $sanitizer; then
    echo 'sanitize = address,undefined,leak' >> Makefile
fi

if [ ! -z "${CXX}" ] || [ ! -z "${CC}" ] ; then
    echo "Using custom copiler: CXX=$CXX CC=$CC"
    printf "\n# Compiler config\n" >> Makefile

    if [ ! -z "${CXX}" ] ; then
        echo "CXX ?= ${CXX}" >> Makefile
    fi

    if [ ! -z "${CC}" ]; then
        echo "CC ?= ${CC}" >> Makefile
    fi
fi

echo '' >> Makefile
cat Makefile.in >> Makefile
echo "Configuration complete, type 'make' to build ${project_name}."