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From: "vzh (vzhbanov AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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To: geda-user AT delorie DOT com
Subject: Re: [geda-user] lepton-sch2pcb: wrong ${prefix} for pcb
Date: Tue, 21 Mar 2023 23:33:25 +0300
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"karl AT aspodata DOT se [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com> writes:

>   For:
> $ git branch  -v
> * (HEAD detached at vzh/sch2pcb-rewrite-sch2pcb-add-elements-in-scheme) 60d7148f0 sch2pcb: Rewrite sch2pcb_add_elements() in Scheme.
>
>  running lepton-sch2pcb doesn't find pcb's common.m4:
> $ lepton-sch2pcb styrkort.sch 
> ...
> gsch2pcb backend configuration:
>
>    ----------------------------------------
>    Variables which may be changed in gafrc:
>    ----------------------------------------
>    gsch2pcb:pcb-m4-command:    "/usr/bin/m4"
>    gsch2pcb:pcb-m4-dir:        "/usr/local/share/pcb/m4"
>    gsch2pcb:pcb-m4-path:       ("$HOME/.pcb" ".")
>    gsch2pcb:m4-files:          ""
>
>    ---------------------------------------------------
>    Variables which may be changed in the project file:
>    ---------------------------------------------------
>    gsch2pcb:use-m4:            yes
>
>    ----------------
>    M4 command line:
>    ----------------
>    /usr/bin/m4 -d -I/usr/local/share/pcb/m4 -I$HOME/.pcb -I. /usr/local/share/pcb/m4/common.m4  -
>
> =====================================================
> Using the m4 processor for pcb footprints
> /usr/bin/m4: cannot open `/usr/local/share/pcb/m4/common.m4': No such file or directory
> ...
>
>  m4 is looing in the wrong place:
> $ ls -l /usr/share/pcb/m4/common.m4 
> -rw-r--r-- 1 root root 3718 Feb  3  2019 /usr/share/pcb/m4/common.m4
> $ ls -l /usr/local/share/pcb/m4/common.m4 
> ls: cannot access '/usr/local/share/pcb/m4/common.m4': No such file or directory
> $
>
>
>  Can it be that configure assumes the same ${prefix} for both lepton 
>  and pcb:

It looks like this is true.  A similar issue wrt geda-gaf has been
discussed recently on the list:

  https://delorie.com/archives/browse.cgi?p=geda-user/2023/03/13/17:27:56

I imagine two ways to solve / work around it:

- Find out a reliable command (possibly several commands) that would
  define pcb m4 path at the run time.

- Add a config key to override the path set by configure.  (Not sure if
  configure has to look up for it at all.)  E.g. "m4-path" in the group
  "[sch2pcb]".

WDYT?

Regards,
  Vladimir