			Building GNU-Prolog RPM(s)
			--------------------------


Refer to http://www.rpm.org/ for more information about the Red Hat Package
Manager. A version 3.0.4 or higher is required.



1) Building a RPM classically
-----------------------------

To build RPM for GNU-Prolog:

   make rpm

The stages executed are:

   1- build a distribution file (gprolog-VERSION.tar.gz) if needed using 
      'make dist' in the src (parent) directory.

   2- copy it under the RPM SOURCES directory

   3- uncompressing it (%setup in the %prep target of the spec file)

   4- configure (./configure in the %build target)

   5- compile locally (make in the %build target)

   6- install it in the build root directory (%install target)

   7- build the .rpm file

The RPM spec file created is called: gprolog.spec (it is also copied in the
SPECS directory of the RPM tree).

The RPM file is created in the RPMS directory of the RPM tree (rpm displays
this information).



2) Building a RPM fastly 
------------------------

If you have locally compiled GNU-Prolog (using './configure' followed by
'make' in the src (parent) directory) you can avoid stages 1, 2, 3, and 5
described above using:

   make rpm-link

This will only create a symlink in the RPM BUILD directory refering the
current tree.

The RPM spec file created is called: gprolog-link.spec (it is also copied in
the SPECS directory of the RPM tree).

NB: ./configure and make must have been done previously



3) Using a local RPM tree
-------------------------

You do not need to be root to build a RPM but you must be able to write in
the RPM tree structure (/usr/src/RPM/... /usr/src/redhat or similar). You can
use symlinks or build your own structure in a place you can write using the
make_rpm_tree script passing the prefix of the wanted tree as argument). For
instance to build a tree under your HOME directory use:

   ./make_rpm_tree $HOME

This will update your $HOME/.rpmmacros to inform rpm to use your own local
RPM tree.



4) Testing your RPM
-------------------

To test a RPM you can install it as usual using 'rpm -U RPM_FILE' (this file
is created in the RPMS directory of the RPM tree) and remove it when finished
using 'rpm -e gprolog'.

However, 1) you need to be root, 2) you uselessly modify the RPM database
(since at the end the RPM is removed). Point 1) can be overcome using the
--prefix option of rpm since the RPM is relocatable. Point 2) can be overcome
using the --dbpath option to specifying a dummy RPM data base path. This is
exaclty what does the try_rpm script. To use:

   try_rpm RPM_FILE

This installs the RPM in a temporary directory (under /tmp) that can be
safely removed using rpm -rf ... since the installation does not affect the
RPM database.



5) Building a source RPM
------------------------

To build a source RPM for GNU-Prolog:

   make srpm

The SRPM file is created in the SRPMS directory of the RPM tree (rpm displays
this information).
