[NEW/WIP] Qflow porting // [3/7] graywolf

Dear ports@ readers,

enclosed please find a port for graywolf [1], the tool required by Qflow
[2] for placement:

[... snip ...]
graywolf - a fork of TimberWolf 6.3.5

graywolf is a placement tool used in VLSI design.

TimberWolf was developed at Yale University, and was distributed
as open source for a time until it was taken commercial. The last
open-source version of TimberWolf does not perform detail routing,
but is a professional-grade placement tool.

The main improvement in graywolf is that the build process is more
streamlined and that it behaves as a normal tool - you can call it
from anywhere and no environment variables must be set first.

It's mainly used together with Qflow
(http://opencircuitdesign.com/qflow/).[... snip ...]

First things first, upstream released a new version a month ago (after 2
years); I didn't have the chance to try it yet, so this tarball is for
the previous release (0.1.4).

Patches:
========
Apart from usual stuff needed to correctly set include files when the
__OpenBSD__ identifier is found (patch-include_yalecad_base_h,
patch-src_Ylib_timer_c), the main problem here is that the code is very
old (with very limited possibility to see it updated, since the current
maintainer doesn't know it very well; he's doing a great work in
tweaking it as needed to build in a "modern" environemnt, but that's all):

- in patch-src_Ylib_okmalloc_c, I removed the cfree function, using free
instead (this should be fixed in the latest release);

- in patch-src_date_getdate_c, I fixed the definition in main function from:

main( argc , argv )
int argc ;
char *argv ;

to:

main( argc , argv )
int argc ;
char **argv ;

Finally, I patched CMakeList.txt:

- including /usr/X11R6/include and adding /usr/X11R6/lib to the link
directories (please suggest if there is a wiser way to do that...);

- adding "-Wno-return-type" to CFLAGS (otherwise the code doesn't
compile correctly with clang);

- removing a symbolic link required after the install (I moved it in the
post-install target, since doing it the way it was doesn't work, even if
I didn't fully understand why... please comment!)

Compiles and runs correctly on amd64, lightly tested in Qflow.

Of course, I step-up for maintainership.

[1] https://github.com/rubund/graywolf
[2] https://marc.info/?l=openbsd-ports&m=153270090320035&w=2

--
Alessandro DE LAURENZIS
[mailto:just22@atlantide.t28.net]
Web: http://www.atlantide.t28.net
LinkedIn: http://it.linkedin.com/in/delaurenzis