I replied here before reading the thread in
https://talkchess.com/forum3/viewtopic.php?f=7&t=80829&sid=e69a2860788f0963c60097ec4e9b1f88&start=160.
Did you get past all the problems and compile successfully? I wasn't quite
sure from the thread there.

It may make more sense for me to reply there than here...

On Tue, Feb 28, 2023 at 12:25 PM Tim Mann <[email protected]> wrote:

> OK, the multiple definition errors are an easy fix: "extern" was left off
> of the declarations in the .h files. Not sure how that ever worked!  I will
> push this fix to Savannah master branch.
>
> diff --git a/backend.h b/backend.h
> index fae2ee63..bd280eae 100644
> --- a/backend.h
> +++ b/backend.h
> @@ -242,7 +242,7 @@ extern GameInfo gameInfo;
>
>  /* ICS vars used with backend.c and zippy.c */
>  enum ICS_TYPE { ICS_GENERIC, ICS_ICC, ICS_FICS, ICS_CHESSNET /* not
> really supported */ };
> -enum ICS_TYPE ics_type;
> +extern enum ICS_TYPE ics_type;
>
>  /* pgntags.c prototypes
>   */
> diff --git a/evalgraph.h b/evalgraph.h
> index f4b4f920..2ab0e3c1 100644
> --- a/evalgraph.h
> +++ b/evalgraph.h
> @@ -34,7 +34,7 @@ typedef enum { PEN_NONE, PEN_BLACK, PEN_DOTTED,
> PEN_BLUEDOTTED, PEN_BOLDWHITE, P
>  #define OPEN   0
>
>  /* Module globals */
> -ChessProgramStats_Move * currPvInfo;
> +extern ChessProgramStats_Move * currPvInfo;
>  extern int currFirst;
>  extern int currLast;
>  extern int currCurrent;
>
> On Tue, Feb 28, 2023 at 12:21 PM Tim Mann <[email protected]> wrote:
>
>> The person (Arun Persaud) who used to update the "official" xboard source
>> on savannah.gnu.org by merging in HGM's work mostly left the project
>> several years ago, and I haven't been active in the project for many years
>> other than to do occasional administrative things when needed. So I assume
>> HGM's source is quite a ways ahead of what's on Savannah. Looking at the
>> git log, I see the source on Savannah has not changed much since v4.9.1.
>> was tagged.
>>
>> I actually don't know how to git clone HGM's source. I'm not sure if he
>> has a git server or only gitweb. I wasn't able to guess the right URL to
>> clone from via git:// or http://. HGM, if you're tuned in, can you
>> answer that?
>>
>> To clone the Savannah source, see these pages:
>> https://savannah.gnu.org/maintenance/UsingGit/ and
>> https://savannah.gnu.org/projects/xboard/. Getting a read-only clone may
>> be fine to start with, but if you are going to work on the code, I
>> encourage you to sign up for a membership on Savannah (it's free, of
>> course), and I can add you as an official project member there. I will have
>> to review how to do that, but I used to know.  :-)
>>
>> I see the compile instructions in the README are out of date for starting
>> from a git clone. They are missing the initial step of running
>> ./autogen.sh. I tried the following on my current Ubuntu 22.04 system,
>> which I think is more or less correct.
>>
>>    ./autogen.sh
>>    ./configure
>>    make
>>
>> However, the current git source at the head of the master branch
>> ultimately fails to link with lots of "multiple definition" errors on
>> ics_type and currPvInfo. Maybe an incompatibility with the current gcc.
>>
>> You may not even get that far if you don't have enough packages installed
>> on your Linux. On Ubuntu, "apt get build-essential" helps, but there are
>> more developer packages needed that build-essential doesn't pull in.
>>
>>
>>
>> On Tue, Feb 28, 2023 at 11:32 AM Tim Mann <[email protected]> wrote:
>>
>>> Thanks for letting me know. I get so many requests to post or join the
>>> mailing list from spambots that I needed to make sure you were a real human
>>> wanting to join!
>>>
>>> I haven't compiled the source for a while, but it was pretty
>>> straightforward last time I did. I'll see if there are any hints, and of
>>> course you can ask on the list.
>>>
>>> On Mon, Feb 27, 2023 at 2:32 PM Rick Groszkiewicz <[email protected]>
>>> wrote:
>>>
>>>> I have been working with HGM on this project:
>>>>
>>>> https://talkchess.com/forum3/viewtopic.php?f=7&t=80829&sid=e69a2860788f0963c60097ec4e9b1f88&start=160
>>>>
>>>> I was hoping for guidance on compiling the xboard source - either the
>>>> official code, or HGM's latest:
>>>>
>>>> https://git.savannah.gnu.org/cgit/xboard.git/tag/?h=v4.9.1
>>>>
>>>> http://hgm.nubati.net/cgi-bin/gitweb.cgi?p=xboard.git;a=shortlog;h=refs/heads/v4.9.x
>>>>
>>>> Rick Groszkiewicz
>>>>
>>>

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