Re: [gnugo-devel] GNU Go 2.6 compilation issue on Debian GNU/Linux

[James Dempsey]

Luis, do you know where the minimum values of the "options affecting strength and speed" you linked me to are documented?  I couldn't determine from the source code what values would put GNU Go 3.8 at its weakest rank.

GNU Go 2.6 does not support GTP, so I've scratched that idea.

Were you implying that I'd have better luck with a different engine (e.g., KataGo) if I wanted to control rank?

On Sat, Jul 22, 2023 at 10:38 AM James Dempsey <james.e.dempsey@gmail.com> wrote:

Ah, thanks Luis, somehow I missed that level of granularity given by those options.

I would wonder, though, if `--level` already presets those, and at least from running GNU Go bots on KGS where I've observed `--level 0` and `--level 10` both settle at 4k, would they really make much difference in strength/rank?

There's a GNU Go 2.0 bot on KGS that plays at 11k, which is more what I'm looking for, FYI.

Thank you.

On Fri, Jul 21, 2023 at 5:59 PM Luis Felipe Strano Moraes <luis.strano@gmail.com> wrote:

James,

being quite honest, it will be difficult for you to toggle difficulty by going to older versions. Likely your best bet if you really want to stay with the GNU Go engine, would be to toy around with some of configurations that are also exposed (which level in some cases just defines a preset for) here: https://www.gnu.org/software/gnugo/gnugo_3.html#SEC31 (see section Other options affecting strength and speed)

Best regards,

On Fri, Jul 21, 2023 at 2:55 PM James Dempsey <james.e.dempsey@gmail.com> wrote:

Thanks Luis, I replaced `-lang-c89` with `-std=c90` and that let me compile successfully.

I wanted to try compiling a weaker version :). Even with setting `--level` for 3.8 I see no real difference in strength/rank.

On Fri, Jul 21, 2023 at 4:47 PM Luis Felipe Strano Moraes <luis.strano@gmail.com> wrote:

James,

is there any reason why you are trying to build even older versions?

The error there is that that specific compiler flag is not valid for this version of GCC. I'd guess you would have to look at how to switch it for something else to see if it would still build, this seems to be implying it should be using the C89 standard, which you can do in different ways now:

https://gcc.gnu.org/onlinedocs/gcc/Standards.html

"-ansi, -std=c90 or -std=iso9899:1990"

I'm trying to chat with folks from GNU to see if we can sort out making a new release of GNU Go to at the very least solve some compilation issues and make it build again, hopefully have something happen soon on it.

Best regards,

On Fri, Jul 21, 2023 at 6:08 AM James Dempsey <james.e.dempsey@gmail.com> wrote:

Hello,

I'm experiencing another compilation issue, this time for GNU Go 2.6 on Debian GNU/Linux 11 (bullseye).

gcc is

gcc (Debian 10.2.1-6) 10.2.1 20210110

Error is:

gcc -DHAVE_CONFIG_H -I. -I. -I.. -I../engine -I../interface    -g -O2 -Wall -W -Wpointer-arith -Wbad-function-cast -Wcast-qual -Wcast-align -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wp,-lang-c89 -c sgf.c
cc1: error: command-line option ‘-lang-c89’ is valid for the driver but not for C
make[2]: *** [Makefile:155: sgf.o] Error 1
make[1]: *** [Makefile:158: all-recursive] Error 1
make: *** [Makefile:306: all-recursive-am] Error 2

One again, not a C programmer and couldn't exactly make sense of the answers I had searched for.  Any help would be appreciated.

Thank you. 

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Luís Felipe Strano Moraes

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Luís Felipe Strano Moraes

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