So are you suggesting that the entire block: LIBS="$LIBS -ldl" AC_MSG_CHECKING([for -ldl]) AC_TRY_LINK( [#include <dlfcn.h>], [volatile int f = 0; if (f) dlopen ("dummy", 0);], [AC_MSG_RESULT([yes]); have_dl=yes], [AC_MSG_RESULT([no])]) if test x"$have_dl" = x"yes"; then pluginlibs="$pluginlibs -ldl" fi should be replaced with something based on AC_CHECK_LIB? I'll give that a test! Thanks, Nicholas "Indy" Ray On Mon, Oct 5, 2009 at 3:38 PM, Ian Lance Taylor <iant@xxxxxxxxxx> wrote: > "Nicholas \"Indy\" Ray" <arelius@xxxxxxxxx> writes: > >> The problem is that on FreeBSD -ldl is not available or required, the >> functionality is provided by libc > > I think understand that. What I am saying is that the configure > script should test for that property--the fact that -ldl is not > available or required--rather than test the type of host for which gcc > is being configured. > > Ian > > >> Nicholas "Indy" Ray >> >> On Mon, Oct 5, 2009 at 3:05 PM, Ian Lance Taylor <iant@xxxxxxxxxx> wrote: >>> "Nicholas \"Indy\" Ray" <arelius@xxxxxxxxx> writes: >>> >>>> Indeed, I've sent in a small patch for a warning I got on FreeBSD, >>>> however I'm not sure how to get autoconf to check the host system, >>>> I'll examine other locations in the code and see if I can't cobble a >>>> patch together. >>> >>> When possible, a configure script should test for features, not >>> operating systems. So, for example, the goal would be not to check >>> for FreeBSD, but rather to check for the availability of -ldl, which >>> is typically done using AC_CHECK_LIB. >>> >>> Ian >>> >