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These are instructions to help build Eris, the WorldForge client-side entity
framework. For a more complete discussion of the functions and goals of Eris,
please see the README file, which should be in the same directory as this
document.
The AUTHORS file lists people who can help you if you run into problems;
otherwise you can try the WorldForge mailing lists (note you must be
subscribed to post) or IRC at irc.worldforge.org, in channels #coders and
#eris.
Linux / Unix
You need to have Atlas-C++, skstream, wfmath and libsigc++ to build Eris. In
addition it is assumed you have an up-to-date C++ compiler and STL
implementation. If you find other compilers that work or fail, please let me
(James) know.
Atlas-C++, skstream and WFMath are available as tarballs (and possibly
compiled packages, depending on your system) from ftp.worldforge.org. The Eris
configure script will test for the appropriate minimum versions. Note that
officially released tarballs will only require released versions of the
dependant libraries, but at times the CVS version will depend on unstable (i.e
from CVS) libraries.
libSigC++ is available for almost all distributions, though possibly in the
set of additional or extra packages. As a convenience, we provide source and
binary rpms from various current distributions in the 'third-party' directory
on ftp.worldforge.org. Otherwise get the library in your preferred format
from:
http://libsigc.sourceforge.net/
Due to variations in the C++ ABI, do NOT use a binary version compiled for a
distribution other than your own; you may be able to compile code but then
fail at link-time or run-time with very unpleasant errors. This includes
differences in the C library version, the compiler itself, and the standard
C++ library. You can test your installation by running the following command
from a shell:
pkg-config --modversion sigc++-2.0
This should print out the libSigC++ version number; if pkg-config reports that
the sigc package is unknown, you are probably missing the development package,
or if you installed from source, installed to some location that pkg-config
doesn't know about (you may need to set the PKGCONFIG_PATH environment
variable)
If Gtk-2.x is detected, Eris will build a Poll implementation that integrated
directly with the Gtk mainloop, so if you are planning to work on a Gtk-2
based client, make sure Gtk-2 is installed before you build Eris.
Once these pre-requisites are satisfied, you can proceed with compiling Eris.
This should be a standard 'configure; make; make install'. At present there
are no special arguments, but verify everything goes okay. If you get errors
about libraries not being found, and you believe they are installed, do NOT
hack around the problem in configure. Verify that you have the correct
development packages installed and that pkg-config has located the
configuration files for each library. Also make sure you've run ldconfig if
you just installed the libraries form source, otherwise the test programs
configure tries to compile won't work.
Assuming configure is successful, simply 'make' and 'make install'. You can
also run 'make check' to build and run the unit-tests, which should print out
some debug output followed by 'all tests passed'. If the tests fail, or you
get compilation errors, please get in touch with the maintainers.
If you have Doxygen installed, executing 'make doc' will build the
documentation; at present only HTML is built. Edit eris.dox to change the
output formats / styles. If you find errors or omissions in the documentation,
please let me (James) know.
MSVC
This might work, though you'll need to link libSigc++ statically. Using VC
.NET may help, since the C++ compiler is greatly improved. If you try to
compile using MSVC, please let me know, whatever the outcome, so I can update
this section
OS-X / XCode
A autoconf based build will work fine, assuming you have pkg-config and the
like available (for example, from Fink). Fink also provides a libSigc++
package.
The easier way, on OS-X, is to use the XCode project to build an Eris
framework. If you choose to persue this approach, be aware you need to build
all the WorldForge libs as frameworks too : this requires some setup, but
works very well once it's done.
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