darwin*)
    MACOSX=yes
    MACOSX_SYSROOT=/Developer/SDKs/MacOSX10.6.sdk
    if test -d ${MACOSX_SYSROOT}; then
	MACOSX_CFLAGS="-arch i386 -mmacosx-version-min=10.4 -isysroot ${MACOSX_SYSROOT}"
        AS_FLAGS="-arch i386 ${AS_FLAGS}"
	MACOSX_LDFLAGS="${MACOSX_CFLAGS} -Wl,-syslibroot,${MACOSX_SYSROOT}"
	CFLAGS="${CFLAGS} ${MACOSX_CFLAGS}"
	LDFLAGS="${LDFLAGS} ${MACOSX_LDFLAGS}"
    fi
    MODULE_LDFLAGS="${MODULE_LDFLAGS} -bundle -bundle_loader "'${SCHEME_EXE}'
    ;;
netbsd*)