configure

#!/bin/sh

prefix=/usr/local
debug="default"
extra_cxxflags="$CXXFLAGS"
extra_ldflags="$LDFLAGS"
release=false

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

    --debug)
        debug=true;;

    --no-debug)
        debug=false;;

    --release)
        release=true;;

    --help)
        echo 'usage: ./configure [options]'
        echo 'options:'
        echo '  --prefix=<path>: installation prefix'
        echo '  --debug: enable debug build'
        echo '  --no-debug: disable debug build (default for release builds)'
        echo '  --release: enable release build'
        echo 'all invalid options are silently ignored'
        exit 0
        ;;
    esac
done

echo 'generating makefile ...'
echo "SELF_DIR = $(pwd)" > Makefile
echo "export PREFIX = $prefix" >> Makefile

echo "export RELEASE = $release" >> Makefile

if [ "$release" = "true" ]; then
    extra_cxxflags="$extra_cxxflags -O2"
fi

if [ "$debug" = "true" ] || { [ "$debug" = "default" ] && [ "$release" = "false" ]; }; then
    extra_cxxflags="$extra_cxxflags -g -DDEBUG=1 -Wl,-rpath,\$(SELF_DIR)/build"
fi

if ldconfig -p | grep -q libboost_iostreams; then
    extra_cxxflags="$extra_cxxflags -DUSE_BOOST_IOSTREAMS=1"
    extra_ldflags="$extra_ldflags -lboost_iostreams"
fi

echo "EXTRA_CXXFLAGS=$extra_cxxflags" >> Makefile
echo "EXTRA_LDFLAGS=$extra_ldflags" >> Makefile
cat Makefile.in >> Makefile
echo 'configuration complete, type make to build.'