wxWidgets/install/gtk/INSTALL

* General
----------

wxGTK uses GNU configure. If you have problems with your make use GNU
make instead.

* Create your configuration
-----------------------------
Usage:
	./configure options

If you want to use system's C and C++ compiler,
set environment variables CC and CCC as

	% setenv CC cc
	% setenv CCC CC
	% ./configure options

to see all the options please use:

	./configure --help

The basic philosophy is that if you want to use different
configurations, like a debug and a release version, 
or use the same source tree on different systems,
you have only to change the environment variable OSTYPE.
(Sadly this variable is not set by default on some systems
in some shells - on SGI's for example). So you will have to 
set it there. This variable HAS to be set before starting 
configure, so that it knows which system it tries to 
configure for.

Configure will complain if the system variable OSTYPE has 
not been defined. And Make in some circumstances as well...

* General options
-------------------

The following options handle the kind of library you want to build.

	--with-shared           Create shared libraries.

	--without-optimise	Do not optimise the code.

	--with-profile          Add profiling info to the
	                        object files. Currently
				broken.
				
	--with-mem_tracing      Add built-in memory tracing.
	                        Not yet.
				
	--with-debug		Add debug info to object
	                        files.

* Feature Options
-------------------

When using the Windows version of wxWindows, it is possible
to edit the file /include/wx/msw/setup.h in order to enable
or disable some features of wxWindows so that the resulting
binaries get smaller.

As I don't yet care for binary size and target mainly at
producing a shared library, wxGTK's configure system auto-
matically enables all features, as long as they are already
implemented.

* Additional libraries
-----------------------

[Note: Currently wxGTK will compile out-of-the-box
 with no extra libraries required. Support for
 OpenGl, threads, Python and hopefully ODBC
 support will soon be added.]

wxGTK requires the GTK (The Gimp Toolkit) to be installed,
which probably makes sense.

There will be a few more features of wxGTK, which will 
require further libraries (on some platforms). These
features will be optional. I hope to teach configure
to check that out automatically.

Thread support:

  Requires pthreads under Linux without glibc.
  
OpenGl:

  Requires OpenGl or MesaGl.
  
Python scripting language support:

  Requires Python.
  
* Compiling
-------------

First you have to create all makefiles in all subdirectories:

	make makefiles

Dependencies are generated automatically using

	make depend

Now the makefiles are created you can compile everything is as simple
as typing:

	make

make yourself some coffee, as it will try to compile
ALL the files in this distribution.

if you want to be more selective:

	make src	will build only the base libraries
	make utils	will build the utils
	make samples	will build the samples
	make other	will build the other samples
	make user	will build the files in the directory other

Depending on the configuration of some files, the libraries
and binaries will be placed in different directories.
The "global" binaries and libraries will be placed in:

	bin/$(OSTYPE) and
	lib/$(OSTYPE) respectively

"local" binaries and libraries will be placed in:

	(basedir of that application)/$(OSTYPE).

This is also the place where all the object-files will go.

If you want to conserve disk space by removing unnecessary
object-files:

	 make clean_obj

will do the work for you.

* Creating a new Project
--------------------------

I propose to put all contributed programs in the directory
"user", with a directory of its own.

This directory then should include the following files:

Makefile        (You can copy this one from any application in samples
                 probably you will not need to edit this one. There is
                 only one case where you might be interested in changing
                 this file, but about that see later.)
Makefile.in	(This is the base application-Makefile template, from
                 which the actual Makefile for each system is created.
                 More about this later)

put ALL your source code along with all the other stuff you need for
your application in this directory (subdirectories are welcome).

** Something about Makefiles
------------------------------

On general principle it should only contain ONE line, which is as follows:

	include ../../src/gtk/setup/general/makeapp

this will include all the necessary definitions for creating the applications

the only case where you might want to add another line is the following:
this version of configure also supports creation of source archives of the
application for easy distribution and updates to newer version of wxxt.
    For this purpose all files in the application-directory will be put into
a gziped tar-file in the full notation user/<your application>/*
if you want to include some other files that you want "more visible", like
a README.<yourApp> or a shell script for easy 
compilation/installation/distribution, then you have to add a variable

	DISTRIBUTE_ADDITIONAL=<your files>

to the Makefile.
So it would look like this:

	DISTRIBUTE_ADDITIONAL=README.TheApp
	include ../../src/gtk/setup/general/makeapp

As we have already talked about distribution the command to create a 
distribution is:

	make distrib

NOTE: If you are in the base directory of wxxt it will create 
distribution packages for wxxt as well as for all packages in the
user directory.
    So if you want to create only packages for the files in user,
then go to the directory other and type:

	make distrib

or if you only want one application to be created then
enter the specific directory and type there:
make distrib

All the distribution files will be put in the directory
distrib at the base of the wxxt-tree (where also configure
and template.mak can be found).

** Something about Makefile.in
--------------------------------

As you have already seen with Makefile, configure makes a lot of use
if the include statement in make to keep the Makefiles as simple as 
possible.

So basically there are only variables to define and then a include command.
Exception to this rule is if you have special rules for some stuff...
These rules should go AFTER the include statement!!!

so the general header looks like this:

	# wxGTK base directory
	WXBASEDIR=@WXBASEDIR@
	# set the OS type for compilation
	OS=@OS@
	# compile a library only
	RULE=bin

and the general footer will look like this:

	# include the definitions now
	include ../../../template.mak

the key variable is RULE, which defines what make should create
in this directory.

here are some examples:

  RULE	  description              
  ===========================================================================
  bin	  creates a local binary (for a global binary prefix bin with g)
  	  additional variables needed:
  		BIN_TARGET	this gives the name of your application
  		BIN_OBJ		this gives the object files needed to
  				link the application
  	  optional variables are:
  		BIN_SRC		this gives the list of c/c++ files for
  				which dependencies will be checked.
  				(This can be achieved with: make depend)
  		BIN_LINK	this gives commands for additional
  				libraries needed to link the application
  ---------------------------------------------------------------------------
  bin2	  creates two local binaries (for global binaries prefix bin2 with g)
  	  in addition to the variables specified above you MUST also
  	  provide the same variables with BIN2_ instead of BIN_
  ---------------------------------------------------------------------------
  lib	  creates a local library (for a global binary prefix bin with g)
  	  additional variables needed:
  		LIB_TARGET	this gives the name of your library
  		LIB_OBJ		this gives the object files needed for
  				the library to be build.
  	  optional variables are:
  		LIB_SRC		this gives the list of c/c++ files for
  				which dependencies will be checked.
  	  libbin and libgbin are also possible and will need in addition
  	  the variables from bin
  ---------------------------------------------------------------------------
  gslib	  is similar to lib, but it creates a shared library if the system
  	  supports it.
  	  additional variables needed:
  		LIB_MAJOR	major number of the shared library
  		LIB_MINOR	minor number of the shared library
  ---------------------------------------------------------------------------
  other additional variables:

  	  ADD_COMPILE	   define additional includes/defines that
  			   are needed to compile the object files
  			   (if you need to reference some directory
  			   utils - like wxGrid -, then please 
  			   reference them with the variables defined
  			   in template.mak - e.g.: $(SRCDIR),$(UTILS),
  			   $(SAMPLES),$(OTHERS))

  	  NEEDED_DEFINES   lists all the defines that HAVE to be set in
  			   /include/wx/setup.h to compile correctly.

	  SRC_DIR	   lists all directories that are needed to
			   compile. (i.e: lists all the directories,
			   where there are source-files.) But it is 
			   also needed to clean an object and for 
			   machines, for which make does not support 
			   VPATH

currently there are the following compiling rules provided:
object files are created for the following file extensions:
.c .cc .cpp

Please have a closer look at the Makefiles in this distribution.

* Platforms configure is working with
---------------------------------------

Please report build succes on any machine. Especially non-
Linux operating systems (which I don't have).

Original author of the autoconf system for wxxt-1.66 and for this INSTALL
file:

	Martin Sperl	sperl@dsn.ast.univie.ac.at
	
Ported to wxGTK 0.1:

	Wolfram Gloger  wmglo@dent.med.uni-muenchen.de

Thanks alot to both of them.

In the hope that it will be useful,

        Robert Roebling roebling@sun2.ruf.uni-freiburg.de