in libtool-override.mk , missing test for empty LIBTOOL_OVERRIDE, cause problem in some shell (Solaris again...) [root@u2 1080] diff libtool-override.mk.orig libtool-override.mk 63c63 < .if defined(LIBTOOL_OVERRIDE) --- > .if defined(LIBTOOL_OVERRIDE) && !empty(LIBTOOL_OVERRIDE) [root@u2 1081]