Add virtual keyword where applicable.

[wxWidgets.git] / BuildCVS.txt

------------------------------------------------------------------------
                How to build the sources from CVS
------------------------------------------------------------------------

Please use the install.txt files in docs/gtk, docs/msw, docs/motif, docs/mac
etc. alongside these instructions.

I) Windows using plain makefiles
----------------------------------------

a) If using Microsoft Visual C++ 5.0 or 6.0

Ensure that the command-line compiler and tools (including
nmake) are installed and ready to run.  Depending on your
installation there may be a batch file (commonly named VCVARS32.BAT)
that needs to be run to set correct environment variables and PATH entries.

Continue with item c) below.


b) If using the MinGW or Cygwin compilers

You can get MinGW from  http://www.mingw.org/

Cygwin is available at  http://www.cygwin.com/

If you are using Cygwin or MinGW together with the MSYS environment, you
can build the library using configure (see "Unix ports" and
"Windows using configure" below). You can also
build wxWidgets without configure using native makefile, but only with
MinGW. Using Cygwin together with Windows makefile is no longer supported.

If building with MinGW without configure:

-> Set your path so that it includes the directory
   where your compiler and tools reside

-> Make sure you have GNU Make installed. It must be Windows native version.
   Download it from http://www.mingw.org, the executable will be called
   mingw32-make.exe.

-> Modern version of MinGW is required; preferably MinGW 2.0 (with gcc3),
   but MinGW with gcc-2.95.3 will suffice. If you are using 2.95, you will
   have to change variable GCC_VERSION in config.gcc (see msw/install.txt
   for details).

If using configure, Unix instructions apply.


c) Build instructions

Assumming that you installed the wxWidgets sources
into c:\wxWidgets:

-> Copy c:\wxWidgets\include\wx\msw\setup0.h
   to   c:\wxWidgets\include\wx\msw\setup.h
-> Edit c:\wxWidgets\include\wx\msw\setup.h to choose
   the features you would like to compile wxWidgets with[out].

   and std iostreams are disabled with
   #define wxUSE_STD_IOSTREAM   0
 
-> type: cd c:\wxWidgets\build\msw
-> type: make -f makefile.gcc  (if using GNU tools)
or type: nmake -f makefile.vc   (if using MS VC++)
etc.

   See also docs/msw/install.txt for additional compilation options.

d) Borland (including free command line tools)
   Download tools from http://www.borland.com/downloads/
   
   See docs/msw/install.txt for details; in brief:

-> type cd c:\wxWidgets\build\msw
-> type make -f makefile.bcc

You can customize many things in the build process, detailed description is
in docs/msw/install.txt.


II) Unix ports
--------------

Building wxGTK or wxMotif completely without configure
won't ever work, but there is now a new makefile system
that works without libtool and automake, using only
configure to create what is needed.

In order to create configure, you need to have the
GNU autoconf package (version > 2.54) installed
on your system and type run "autoconf" in the base
directory (or run the autogen.sh script in the same
directory, which just calls autoconf). Note that you usually don't
need to do this because configure is included in CVS.

Set WXWIN environment variable to the base directory such
as ~/wxWidgets (this is actually not really needed).

-> type: export WXWIN=~/wxWidgets
-> type: md mybuild
-> type: cd mybuild
-> type: ../configure --with-motif
or type: ../configure --with-gtk
-> type: make
-> type: su <type root password>
-> type: make install
-> type: ldconfig
-> type: exit

Call configure with --disable-shared to create a static
library. Calling "make uninstall" will remove the installed
library and "make dist" will create a distribution (not
yet complete).

III) Windows using configure
----------------------------------------

wxWidgets can be built on Windows using MSYS (see
http://www.mingw.org/), which is a POSIX build environment
for Windows. With MSYS you can just ./configure && make (see also VII,
Unix->Windows cross-compiling using configure).

Of course, you can also build the library using plain makefiles (see
section I).

IV) Classic MacOS using CodeWarrior (eg MacOS 8.x/9.x)
----------------------------------------

Refer to the readme.txt and install.txt files in docs/mac to build
wxWidgets under Classic Mac OS using CodeWarrior.

If you are checking out the CVS sources using cvs under Mac OS X and
compiling under Classic Mac OS:

- make sure that all text files have a Mac OS type of 'TEXT' otherwise
  CodeWarrior may ignore them. Checking out the CVS sources using cvs
  under Mac OS X creates untyped files which can lead to compilation
  errors under CodeWarrior which are hard to track down.

- convert the xml files to CodeWarrior binary projects using the supplied
  AppleScript in docs/mac (M5xml2mcp.applescript for CodeWarrior 5.3)

V) MacOS X using configure and the Developer Tools
----------------------------------------

You need to have the Developer Tools installed. If this is not the case,
you will need to register at the Apple Developer web site (this is a free
registration) in order to download the Developer Tools installer.

In order to create configure, you need to have the
GNU autoconf package (version >= 2.54) installed
on your system and type run "autoconf" in the base
directory (or run the autogen.sh script in the same
directory, which just calls autoconf).

-> type: mkdir macbuild
-> type: cd macbuild
-> type: ../configure --with-mac
or type: ../configure
-> type: make

VI) OS/2
----------------------------------------
No notes.

VII) Unix->Windows cross-compiling using configure
--------------------------------------------------

First you'll need a cross-compiler; linux glibc binaries of MinGW and
Cygwin (both based on egcs) can be found at
ftp://ftp.objsw.com/pub/crossgcc/linux-x-win32. Alternative binaries,
based on the latest MinGW release can be found at
http://members.telering.at/jessich/mingw/mingwcross/mingw_cross.html
Otherwise you can compile one yourself.

[ A Note about Cygwin and MinGW: the main difference is that Cygwin
binaries are always linked against cygwin.dll. This dll encapsulates most
standard Unix C extensions, which is very handy if you're porting unix
software to windows. However, wxMSW doesn't need this, so MinGW is
preferable if you write portable C(++). ]

You might want to build both Unix and Windows binaries in the same source
tree; to do this make subdirs for each e.g. unix and win32. If you've
already build wxWidgets in the main dir, do a 'make distclean' there,
otherwise configure will get confused. (In any case, read the section 'Unix
using configure' and make sure you're able to build a native wxWidgets
library; cross-compiling errors can be pretty obscure and you'll want to be
sure that your configure setup is basically sound.)

To cross compile the windows library, do
-> cd win32
(or whatever you called it)
Now run configure. There are two ways to do this
-> ../configure --host=i586-mingw32 --build=i586-linux --with-mingw
where --build= should read whatever platform you're building on. Configure
will notice that build and host platforms differ, and automatically prepend
i586-mingw32- to gcc, ar, ld, etc (make sure they're in the PATH!).
The other way to run configure is by specifying the names of the binaries
yourself:
-> CC=i586-mingw32-gcc CXX=i586-mingw32-g++ RANLIB=i586-mingw32-ranlib \
   DLLTOOL=i586-mingw32-dlltool LD=i586-mingw32-ld NM=i586-mingw32-nm \
   ../configure --host=i586-mingw32 --with-mingw

(all assuming you're using MinGW)
By default this will compile a DLL, if you want a static library,
specify --disable-shared.

Type
-> make
and wait, wait, wait. Don't leave the room, because the minute you do there
will be a compile error :-)

NB: if you are using a very old compiler you risk to get quite a few warnings
    about "ANSI C++ forbids implicit conversion from 'void *'" in all places
    where va_arg macro is used. This is due to a bug in (some versions of)
    MinGW headers which may be corrected by upgrading your compier,
    otherwise you might edit the file

    ${install_prefix}/lib/gcc-lib/i586-mingw32/egcs-2.91.57/include/stdarg.h

    (instead of egcs-2.91.57 you may have something different), searching for
    the lines

/* Define __gnuc_va_list.  */

#ifndef __GNUC_VA_LIST
#define __GNUC_VA_LIST
#if defined(__svr4__) || defined(_AIX) || defined(_M_UNIX) || defined(__NetBSD__)
typedef char *__gnuc_va_list;
#else
typedef void *__gnuc_va_list;
#endif
#endif

    and adding "|| defined(_WIN32)" to the list of platforms on which
    __gnuc_va_list is char *.

If this is successful, you end up with a wx23_2.dll/libwx23_2.a in win32/lib
(or just libwx_msw.a if you opted for a static build).
Now try building the minimal sample:

-> cd samples/minimal
-> make

and run it with wine, for example (or copy to a Windows box)
-> wine minimal.exe

If all is well, do an install; from win32
-> make install

Native and cross-compiled installations can co-exist peacefully
(as long as their widget sets differ), except for wx-config. You might
want to rename the cross-compiled one to i586-mingw32-wx-config, or something.

Cross-compiling TODO:
---------------------
- resource compiling must be done manually for now (should/can we link the
default wx resources into libwx_msw.a?) [ No we can't; the linker won't
link it in... you have to supply an object file ]
- static executables are HUGE -- there must be room for improvement.