[Nauty] Version 2.7 will soon be the official version, with your help

[Isuru Fernando]

Hi,

Thanks for including the fixes for Windows in this release. I had to apply
the following patch to remove timing structs,
https://github.com/isuruf/nauty-feedstock/blob/8bcacc4dbcc9c7aa0c9c675edcf7e4da4cd00a0d/recipe/time.diff,
but other than that building nauty went smoothly and tests all pass on
windows with clang-cl.

I also tried building it on Mac OSX 10.10 and Ubuntu 18.04 and the test
suite passed on both systems as well.

Isuru

On Tue, Sep 25, 2018 at 9:42 PM Brendan McKay <Brendan.McKay at anu.edu.au>
wrote:

> We are working towards making nauty 2.7
> (incorporating traces 2.2) the official release.
>
> Accordingly, release candidate nauty27rc1 is available at
> http://users.cecs.anu.edu.au/~bdm/nauty/
> http://pallini.di.uniroma1.it
>
> We would like to encourage you to try this version and report any
> problems you encounter (even minor problems).
>
> A list of the main changes is below.
>
> Brendan McKay and Adolfo Piperno
>
> -------------------
>
> * -h and -k options for independent set size and clique size were added
>    to countg and pickg.  For some graphs these use the program cliquer,
>    kindly provided by Sampo Nisjkanen and Patric Ostergard.
>
> * Macros SWHIBIT, REMOVEHIBIT and ATMOSTONEBIT added to nauty.h.
>
> * Added option -a to complg.
>
> * Program copyg can now be used to make a simple filter.  See the
>    instructions inside the source file and the example numleaves.c.
>
> * Programs countg and pickg can now display some parameter values
>    as ranges instead of writing a separate line for each value. For
>    example, countg --ne:T will write a separate line for each number
>    of vertices and edges, with that line showing the range of the
>    number of triangles. Everything after the ':' is shown as a range.
>    There is also a switch -1 that causes output to be in a simple
>    numerical table easy to read from a program and a similar switch
>    -2 that omits counts.
>
> * Program vcolg now handles digraphs and graphs with loops.
>
> * genrang can now make random spanning trees of K(n1,n2)
>
> * amtog has an "s" command for reading tournaments
>
> * The configure script (compiled from configure.ac) was modified to
>    update some tests and remove some old code that is useless. The
>    time-critical parts of nauty are now compiled with
>       -march=native
>    if the compiler allows those switches. Since this may result in
>    a binary which does not run on older machines in the same family,
>    there is a configuration option  --enable-generic  to disable
>    these switches.  To work around a bug with -march-native for
>    gcc version 7 on MacOSX computers (due to the linker not knowing
>    some of the instructions), the extra switch -mno-avx is also added
>    if it appears necessary.
>
> * genspecialg can now make multiple special graphs at once.
>    The -b option has been extended to allow removing a matching from
>    a complete bipartite graph.
>
> * watercluster2 has an option Z to write in digraph6 format.
>
> * Problems for input of graphs with 0 vertices were fixed with help
>    from Kevin Ryde.  However, note that many utilities in the package
>    will not work with such graphs.  It is NOT TRUE that graphs of
>    order 0 are now supported.  However, the primary function nauty()
>    (but not traces()) should work for both dense and sparse versions.
>
> * Stronger measures are taken to ensure that the sort order used by
>    shortg is plain byte order. This corresponds to the C collation
>    order, also known as POSIX, but it may be different from the
>    collation order used by default on your command line. This means
>    that utilities like sort, uniq, comm and join might consider the
>    output of shortg to be out of order. To avoid this, define the
>    environment variable LC_ALL to equal the string "C".
>       bash:   export LC_ALL=C
>       tcsh:   setenv LC_ALL C
>    If LC_ALL is undefined, it will also be sufficient to define
>    LC_COLLATE to equal "C".  The POSIX standard says that LC_ALL
>    takes precedence over LC_COLLATE if both are defined, but this
>    might not be true for older systems.  If you really don't want
>    to change environment variables, you can compile shortg with
>    -DKEEP_SORT_LOCALE but beware that some collation orders are
>    are not even deterministic (i.e. different characters might
>    compare equal).
>
> * The bipartite graph generator genbg now has a -Y switch to
>    specify the minimum number of common neighbours for two
>    vertices on the second side.
>
> * A new version of Traces (including some bug fixes) is included.
>    See traces.c for more.
>
> * New utilities: underlyingg takes the undirected graph underlying
>    a graph or digraph.  assembleg combines a file of graphs (usually
>    connected graphs) as components to make disconnected graphs
>    of a specified size.
>
> * geng has been modified to allow more than 32 vertices.  The
>    makefile knows "geng" for up to 32 vertices, and "gengL" for
>    up to 64 vertices.
>
> * pickg and countg now have -X to reverse the selection.
>    A change was made to allow these utilities to work on Windows
>    computers with sizeof(long) < sizeof(void*).  Also, pickg
>    now writes a header if there is one in the input file.
>
> * listg has -L that can be used in conjunction with -W or -M to
>    write the Laplacian matrix instead of the adjacency matrix.
>
> * Fixed a possible bug in the combination "shortg -kt".
>
> * You can change the archive manager (default "ar") by defining
>    the environment variable AR at configure time.
>
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