FYI: 28-gary-AC_WITH_LTDL.patch

[Gary V. Vaughan]

Index: ChangeLog
from  Gary V. Vaughan  <address@hidden>

        * ltdl.m4 (AC_WITH_LTDL): New macro to add `--with-included-ltdl'
        option to configure, but to find an appropriate ltdl library and
        append the right options to link it.

Index: ltdl.m4
===================================================================
RCS file: /cvsroot/libtool/libtool/ltdl.m4,v
retrieving revision 1.21.2.6
diff -u -p -u -r1.21.2.6 ltdl.m4
--- ltdl.m4 2001/09/22 16:53:56 1.21.2.6
+++ ltdl.m4 2001/10/27 23:52:31
@@ -20,7 +20,55 @@
 ## configuration script generated by Autoconf, you may include it under
 ## the same distribution terms that you use for the rest of that program.
 
-# serial 2 AC_LIB_LTDL
+# serial 5 AC_LIB_LTDL
+
+# AC_WITH_LTDL
+# ------------
+# Clients of libltdl can use this macro to allow the installer to
+# choose between a shipped copy of the ltdl sources or a preinstalled
+# version of the library.
+AC_DEFUN([AC_WITH_LTDL],
+[AC_REQUIRE([AC_LIB_LTDL])
+AC_SUBST([LIBLTDL])
+AC_SUBST([INCLTDL])
+
+# Unless the user asks us to check, assume no installed ltdl exists.
+use_installed_libltdl=no
+
+AC_ARG_WITH([included_ltdl],
+    [  --with-included-ltdl    use the GNU ltdl sources included here])
+
+if test "x$with_included_ltdl" != xyes; then
+  # We are not being forced to use the included libltdl sources, so
+  # decide whether there is a useful installed version we can use.
+  AC_CHECK_HEADER([ltdl.h],
+      [AC_CHECK_LIB([ltdl], [lt_dlcaller_register],
+          [with_included_ltdl=no],
+          [with_included_ltdl=yes])
+  ])
+fi
+
+if test "x$enable_ltdl_install" != xyes; then
+  # If the user did not specify an installable libltdl, then default
+  # to a convenience lib.
+  AC_LIBLTDL_CONVENIENCE
+fi
+
+if test "x$with_included_ltdl" = xno; then
+  # If the included ltdl is not to be used. then Use the
+  # preinstalled libltdl we found.
+  AC_DEFINE([HAVE_LTDL], 1,
+    [Define this if a modern libltdl is already installed])
+  LIBLTDL=-lltdl
+fi
+
+# Report our decision...
+AC_MSG_CHECKING([whether to use included libltdl])
+AC_MSG_RESULT([$with_included_ltdl])
+
+AC_CONFIG_SUBDIRS([libltdl])
+])# AC_WITH_LTDL
+
 
 # AC_LIB_LTDL
 # -----------

-- 
  ())_. Gary V. Vaughan     gary@(oranda.demon.co.uk|gnu.org)
  ( '/  Research Scientist  http://www.oranda.demon.co.uk       ,_())____
  / )=  GNU Hacker          http://www.gnu.org/software/libtool  \'      `&
`(_~)_  Tech' Author        http://sources.redhat.com/autobook   =`---d__/