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From: "karl AT aspodata DOT se [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] lepton-sch2pcb: wrong ${prefix} for pcb
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Comments: In-reply-to "Peter Stuge (peter AT stuge DOT se) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
   message dated "Fri, 31 Mar 2023 01:19:20 -0000."
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Date: Fri, 31 Mar 2023 10:09:32 +0200 (CEST)
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Peter Stuge:
> karl AT aspodata DOT se [via geda-user AT delorie DOT com] wrote:
> > > > 1, the dirname trick:
> > > >  $(dirname $(dirname $(which pcb)))/share/pcb
> > > >  followed by m4, pcblib-newlib alt. newlib depending of what
> > > >  we are looking for
> > > 
> > > This isn't a good choice at all since it makes assumptions about how
> > > pcb was compiled - specifically that there is a fixed relationship
> > > between the pcb binary path and the library path.
> > 
> >  Well, there seems there is one, at least per default:
> > 
> > $ cd <git>/pcb
> > $ grep -B1 BINDIR_TO_PCBLIBDIR config.h
> > /* Relative path from bindir to pcblibdir */
> > #define BINDIR_TO_PCBLIBDIR "../share/pcb"
> > $
> > 
> >  which can be changed with
> >   --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
> > 
> >  ./configure --datarootdir=/opt
> >  gives:
> > /* Relative path from bindir to pcblibdir */
> > #define BINDIR_TO_PCBLIBDIR "../../../opt/pcb"
> 
> Exactly; because it can be changed by pcb configure it's
> unfortunately not possible to assume anything.

It would still be useful in config phase, with it one could see if one
can find common.m4, else ask configure user for a path.

...
> How about we first try pcb -p --show-defaults, then pcb -x ps, then
> with default hid, then fail?

 The hid lpr depends on the exporter ps:
configure: error: you have requested the lpr HID but not the ps HID, which it depends on

 And you can even ./configure  --with-printer= --with-gui= --with-exporters=

$ src/pcb --show-defaults
Error: No GUI available.
$ src/pcb -x ps --show-defaults
Invalid exporter ps, available ones:
$ src/pcb -p --show-defaults
$ src/pcb -h
Segmentation fault
$

 Oops, found a problem.

> If there's no X then gschem/lepton might anyway not start
> (interactively) - right?

 lepton-sch2pcb/gsch2pcb doesn't need X.

Regards,
/Karl Hammar