Update of bug #67448 (group groff):
Category: None => Macro package -
others/general
Item Group: None => Incorrect behaviour
Status: None => Need Info
Summary: [PATCH] [tmac] aandoc.tmac: add sourcing "an.tmac"
earlier to have used variables in a defined state => [tmac] andoc.tmac: add
sourcing "an.tmac" earlier to have used variables in a defined state
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Follow-up Comment #1:
[comment #0 original submission:]
> From 2b3d8c50f8a1609a6e42a5b569ae65e1b17b0b7f Mon Sep 17 00:00:00 2001
> From: Bjarni Ingi Gislason <bjarn...@simnet.is>
> Date: Thu, 21 Aug 2025 00:14:41 +0000
> Subject: [PATCH] [tmac] andoc.tmac: add sourcing "an.tmac" earlier to have
> used variables in a defined state
>
> Directory: tmac
>
> Test file:
>
> .\" From gawk(1)
> .if !\w@\*(lq@ \{\
> . tm String lq is empty
> .\}
That's not what's actually in the gawk.1 file in its
[https://cgit.git.savannah.gnu.org/cgit/gawk.git/tree/doc/gawk.1 source
distribution].
> Signed-off-by: Bjarni Ingi Gislason <bjarn...@simnet.is>
> ---
> tmac/andoc.tmac | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/tmac/andoc.tmac b/tmac/andoc.tmac
> index cbfebac57..1c9fd9f21 100644
> --- a/tmac/andoc.tmac
> +++ b/tmac/andoc.tmac
> @@ -27,6 +27,10 @@
> .do nr *groff_andoc_tmac_C \n[.cp]
> .cp 0
> .
> +.\" Include "an.tmac" early to get those variables defined,
> +.\" that are used before the macro TH is called.
> +.mso an.tmac
> +.
> .als andoc-em em
> .als andoc-bp bp
> .als andoc-ne ne
I suspect this will break other things. Did you run _groff_'s test suite
after applying this change?
Arnold's technique is not guaranteed to work with _groff_. This is not a
recent development; as far as I know, "andoc.tmac" has always worked with
_groff_'s "an.tmac" (formerly "an-old.tmac") and "doc.tmac" such that
page-local definitions must follow the `TH` call (or `Dd`).
_groff_man_(7):
/.../share/groff/1.23.0/tmac/andoc.tmac
This brief groff program detects whether the man or mdoc
macro package is used by a document and loads the correct
macro definitions, taking advantage of the fact that pages
using them must call TH or Dd, respectively, before any
other macros. A man program or a user typing, for example,
“groff -mandoc page.1”, need not know which package the file
page.1 uses. Multiple man pages, in either format, can be
handled; andoc reloads each macro package as necessary.
Page‐local redefinitions of names used by the man or mdoc
packages prior to TH or Dd calls are “clobbered” by the
reloading process. If you want to provide your own
definition of an extension macro to ensure its availability,
the an-ext.tmac entry below offers advice.
This is not new advice. Here's what _groff_man_(7) from _groff_ 1.22.3
(November 2014) says:
an‐ext.tmac
The extension macro definitions for .SY, .OP, .YS, .TQ,
.EX/.EE, .UR/.UE, and .MT/.ME are contained in this file.
It is written in classic troff, and released for free re‐
use, and not copylefted; manual page authors concerned about
portability to legacy Unix systems are encouraged to copy
these definitions into their pages, and maintainers of troff
or its workalikes are encouraged to re‐use them.
Note that the definitions for these macros are read after
the call of TH, so they will replace macros of the same
names given at the beginning of your file. If you must use
your own definitions for these macros, they must be given
after calling TH.
The advice is more general now, but I haven't substantially changed how
"andoc.tmac" works (and I don't plan to).
So unless you can explain to me how there is a defect here, I'll be closing
the report as invalid.
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