I found a discussion about portable use of shared libraries on this list: http://mail.gnu.org/archive/html/autoconf/2002-05/msg00124.html Despite the apparent consensus that AC_LIB_LINKFLAGS should be added, I cannot find it in 2.57. Has the macro undergone significant changes, or is it simply not in yet? I'm interested because I'd like to use it in Wget, which currently uses libtool for linking. While this solution works, it is quite heavyweight, especially with libtool 1.5, which contains an incredible number of unnecessary checks (e.g. for every FORTRAN compiler under the sun). Also, libtool sometimes breaks on architectures it was not well tested on, which in turn causes Wget to not build. Since Wget doesn't even *use* the functionality of libtool, except for setting up rpath, it would be nice to get rid of the dependency. Please keep me in the Cc when sending replies -- thanks.