[gcc r16-1556] doc: allow extend.texi to be processed by makeinfo 4.13

[Jan Beulich via Gcc-cvs]

https://gcc.gnu.org/g:e1a2af290155e0e6ad73aadf178c1a1860223be4

commit r16-1556-ge1a2af290155e0e6ad73aadf178c1a1860223be4
Author: Jan Beulich <jbeul...@suse.com>
Date:   Wed Jun 18 13:43:23 2025 +0200

    doc: allow extend.texi to be processed by makeinfo 4.13
    
    PR middle-end/120544
    
    As per documentation, even 4.7 ought to suffice. At least 4.13 objects
    to there being nothing ahead of the first comma in @xref{}.
    
    gcc/
    
            * doc/extend.texi: Fill first argument of @xref{}.

Diff:
---
 gcc/doc/extend.texi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index e4f3cc2ad09e..69c651207464 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -10668,7 +10668,7 @@ and @samp{[[omp::sequence(...)]]} in C and C++,
 GCC needs to be invoked with the @option{-fopenmp} option.
 This option also arranges for automatic linking of the OpenMP
 runtime library.
-@xref{,,,libgomp,GNU Offloading and Multi Processing Runtime Library}.
+@xref{Top,,,libgomp,GNU Offloading and Multi Processing Runtime Library}.
 
 @xref{OpenMP and OpenACC Options}, for additional options useful with
 @option{-fopenmp}.
@@ -10690,7 +10690,7 @@ To enable the processing of OpenACC directives 
@samp{#pragma acc}
 in C and C++, GCC needs to be invoked with the @option{-fopenacc} option.
 This option also arranges for automatic linking of the OpenACC runtime
 library.
-@xref{,,,libgomp,GNU Offloading and Multi Processing Runtime Library}.
+@xref{Top,,,libgomp,GNU Offloading and Multi Processing Runtime Library}.
 
 @xref{OpenMP and OpenACC Options}, for additional options useful with
 @option{-fopenacc}.