version_check "libtool" "" "ftp://ftp.gnu.org/pub/gnu/libtool/" 1 4 0 || DIE=1
version_check "pkg-config" "" "http://www.freedesktop.org/software/pkgconfig" 0 8 0 || DIE=1
version_check "libtool" "" "ftp://ftp.gnu.org/pub/gnu/libtool/" 1 4 0 || DIE=1
version_check "pkg-config" "" "http://www.freedesktop.org/software/pkgconfig" 0 8 0 || DIE=1