README file for the IO GAP4 package
To get the newest version of this GAP 4 package download the archive file
and unpack it using
gunzip io-x.x.tar.gz; tar xvf io-x.x.tar
Do this in a directory called
pkg, preferably (but not necessarily)
pkg subdirectory of your GAP 4 installation. It creates a
To install this package do
cd io ./configure
If you installed io in another directory than the usual
path is a path to the main GAP root directory.
for further options.
make to compile a binary file.
The package willnot work without this step.
If you installed the package in another
pkg directory than the standard
pkg directory in your GAP 4 installation, then you have to add the path
to the directory containing your
pkg directory to GAP's list of directories.
This can be done by starting GAP with the
-l command line option
followed by the name of the directory and a semicolon. Then your directory
is prepended to the list of directories searched. Otherwise the package
is not found by GAP. Of course, you can add this option to your GAP
If you installed GAP on several architectures, you must execute the configure/make step for each of the architectures. You can either do this immediately after configuring and compiling GAP itself on this architecture, or alternatively (when using version 4.5 of GAP or newer) set the environment variable "CONFIGNAME" to the name of the configuration you used when compiling GAP before running "./configure". Note however that your compiler choice and flags (environment variables "CC" and "CFLAGS" need to be chosen to match the setup of the original GAP compilation. For example you have to specify 32-bit or 64-bit mode correctly!
Recompiling the documentation is possible by the command
in the IO directory. But this should not be necessary.
For bug reports, feature requests and suggestions, please refer to