Autoconf, Automake, and Libtool: A Module Loading Subsystem

| ## 20.1 A Module Loading Subsystem As you saw in 18. Using GNU libltdl, I need to put an invocation of the macro ``AC_LIBTOOL_DLOPEN'` just before ``AC_PROG_LIBTOOL'`, in the file ``configure.in'`. But, as well as being able to use `libtoolize --ltdl`, which adds libltdl in a subdirectory with its own subconfigure, you can also manually copy just the ltdl source files into your project(45), and use `AC_LIB_LTDL` in your existing ``configure.in'`. At the time of writing, this is still a very new and (as yet) undocumented feature, with a few kinks that need to be ironed out. In any case you probably shouldn't use this method to add ``ltdl.lo'` to a C++ library, since ``ltdl.c'` is written in C. If you do want to use libltdl with a C++ library, things will work much better if you build it in a subdirectory generated with `libtoolize --ltdl`. For this project, lets:
    $ cp /usr/share/libtool/libltdl/ltdl.[ch] sic/
The Sic module loader is probably as complicated as any you will ever need to write, since it must support two kinds of modules: modules which contain additional built-in commands for the interpreter; and modules which extend the Sic syntax table. A single module can also provide both syntax extensions and additional built-in commands.

This document was generated by Gary V. Vaughan on February, 8 2006 using texi2html