* tests/discover.test: Use a full configure.in that calls AC_INIT. Use AC_LIBOBJ. Grep the error message. * test/ldadd.test: Don't use LIBOBJS. Use a full configure.in. Grep the error message. Require libtool. * tests/ldflags.test: Don't use LIBOBJS. * tests/seenc.test: Use AC_LIBOBJ, --Wno-error, and grep the error messages for CC and CXX.