sys-apps/texinfo-6.8: it fails to build due to patch error

[darkgeek]

Hi,

Seems sys-apps/texinfo-6.8 is broken in our overlay:

>>> Preparing source in /var/tmp/portage/sys-apps/texinfo-6.8/work/texinfo-6.8 ...
 * Applying texinfo-6.8-undo-gnulib-nonnul.patch ...                                                   [ ok ]
 * Applying stack-direction-add-loongarch.patch ...
can't find file to patch at input line 16
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|From 34add045fd2ec3f1031dee961c4d9cc4285486a7 Mon Sep 17 00:00:00 2001
|From: Sun Haiyong <youbest@sina.com>
|Date: Tue, 31 Aug 2021 11:11:52 +0800
|Subject: [PATCH] stack-direction: Add support for loongarch CPU
|
|* m4/stack-direction.m4 (SV_STACK_DIRECTION): When the CPU is loongarch,
|set "sv_cv_stack_direction" to "-1" .
|---
| m4/stack-direction.m4 | 1 +
| 1 file changed, 1 insertion(+)
|
|diff --git a/m4/stack-direction.m4 b/m4/stack-direction.m4
|index 93287254b..e6c3284ce 100644
|--- a/m4/stack-direction.m4
|+++ b/m4/stack-direction.m4
--------------------------
No file to patch.  Skipping patch.
1 out of 1 hunk ignored                                                                                [ !! ]
 * ERROR: sys-apps/texinfo-6.8::loongson failed (prepare phase):
 *   patch -p1  failed with /var/tmp/portage/sys-apps/texinfo-6.8/files/stack-direction-add-loongarch.patch
 * 
 * Call stack:
 *               ebuild.sh, line  127:  Called src_prepare
 *             environment, line 1620:  Called default
 *      phase-functions.sh, line  858:  Called default_src_prepare
 *      phase-functions.sh, line  923:  Called __eapi6_src_prepare
 *             environment, line  194:  Called eapply '/var/tmp/portage/sys-apps/texinfo-6.8/files/texinfo-6.8-undo-gnulib-nonnul.patch' '/var/tmp/portage/sys-apps/texinfo-6.8/files/stack-direction-add-loongarch.patch'
 *             environment, line  691:  Called _eapply_patch '/var/tmp/portage/sys-apps/texinfo-6.8/files/stack-direction-add-loongarch.patch'
 *             environment, line  629:  Called __helpers_die 'patch -p1  failed with /var/tmp/portage/sys-apps/texinfo-6.8/files/stack-direction-add-loongarch.patch'
 *   isolated-functions.sh, line  112:  Called die
 * The specific snippet of code:
 *          die "$@"
 * 
 * If you need support, post the output of `emerge --info '=sys-apps/texinfo-6.8::loongson'`,
 * the complete build log and the output of `emerge -pqv '=sys-apps/texinfo-6.8::loongson'`.
 * The complete build log is located at '/var/tmp/portage/sys-apps/texinfo-6.8/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-apps/texinfo-6.8/temp/environment'.
 * Working directory: '/var/tmp/portage/sys-apps/texinfo-6.8/work/texinfo-6.8'
 * S: '/var/tmp/portage/sys-apps/texinfo-6.8/work/texinfo-6.8'

I do dig into /var/tmp/portage/sys-apps/texinfo-6.8/work/texinfo-6.8 and find stack-direction.m4 is missing:

# cd /var/tmp/portage/sys-apps/texinfo-6.8/work/texinfo-6.8
/var/tmp/portage/sys-apps/texinfo-6.8/work/texinfo-6.8 # ls
ABOUT-NLS   ChangeLog.46  COPYING  INSTALL          Makefile.in  Pod-Simple-Texinfo  TODO
aclocal.m4  config.in     djgpp    INSTALL.generic  man          README              tp
AUTHORS     configure     doc      install-info     NEWS         README-hacking      util
build-aux   configure.ac  gnulib   js               po           system.h
ChangeLog   contrib       info     Makefile.am      po_document  texindex
/var/tmp/portage/sys-apps/texinfo-6.8/work/texinfo-6.8 # find . -name 'stack-direction.m4'
/var/tmp/portage/sys-apps/texinfo-6.8/work/texinfo-6.8 #