From cf17cee6f4674b91bd29141c11c52c4fa1a0f027 Mon Sep 17 00:00:00 2001
From: "Z. Liu" <zhixu.liu@gmail.com>
Date: Tue, 28 Apr 2026 18:52:17 +0800
Subject: [PATCH] sci-mathematics/octave: fix doc build

Closes: https://bugs.gentoo.org/971018
Signed-off-by: Z. Liu <zhixu.liu@gmail.com>
Part-of: https://github.com/gentoo/gentoo/pull/46174
Closes: https://github.com/gentoo/gentoo/pull/46174
Signed-off-by: Sam James <sam@gentoo.org>
---
 ...ix-qt-help-generator-for-texinfo-7.3.patch | 34 +++++++++++++++++++
 sci-mathematics/octave/octave-11.1.0.ebuild   |  1 +
 sci-mathematics/octave/octave-9.2.0-r2.ebuild |  1 +
 3 files changed, 36 insertions(+)
 create mode 100644 sci-mathematics/octave/files/octave-9.2.0-fix-qt-help-generator-for-texinfo-7.3.patch

diff --git a/sci-mathematics/octave/files/octave-9.2.0-fix-qt-help-generator-for-texinfo-7.3.patch b/sci-mathematics/octave/files/octave-9.2.0-fix-qt-help-generator-for-texinfo-7.3.patch
new file mode 100644
index 000000000000..cba01a841de7
--- /dev/null
+++ b/sci-mathematics/octave/files/octave-9.2.0-fix-qt-help-generator-for-texinfo-7.3.patch
@@ -0,0 +1,34 @@
+https://github.com/gnu-octave/octave/commit/e21b1898cb6507dff38679c25b4db7fde44de883
+From e21b1898cb6507dff38679c25b4db7fde44de883 Mon Sep 17 00:00:00 2001
+From: "Dmitri A. Sergatskov" <dasergatskov@gmail.com>
+Date: Sun, 8 Mar 2026 16:08:04 -0400
+Subject: [PATCH] Fix Qt help generator for Texinfo 7.3 Function-Index output.
+
+Texinfo 7.3 changed the HTML classes used for the function index.
+Update the Qt help generator to handle both the old and the new HTML
+forms when parsing Function-Index.html.
+
+* mk-qthelp.pl: Accept new printindex-style function
+index table classes in Function-Index.html parsing.
+
+diff --git a/doc/interpreter/mk-qthelp.pl b/doc/interpreter/mk-qthelp.pl
+index 475ba20b22..a68af8b0ad 100755
+--- a/doc/interpreter/mk-qthelp.pl
++++ b/doc/interpreter/mk-qthelp.pl
+@@ -72,7 +72,12 @@ open ($HTML, "<", $htmlfname) or die "Unable to open $htmlfname";
+ 
+ # Skip through preamble of file to find start of list
+ while (defined ($_ = <$HTML>)
+-         and ! /^<table class="(?:index-fn|fn-entries)/ ) {;}
++         and ! /<table\b[^>]*\bclass="[^"]*\b
++                 (?:
++                   index-fn |
++                   fn-entries |
++                   fn-entries-printindex
++                 )\b/x ) {;}
+ 
+ die "Function-Index.html: reached EOF without finding data start pattern"
+   if eof ($HTML);
+-- 
+2.49.1
+
diff --git a/sci-mathematics/octave/octave-11.1.0.ebuild b/sci-mathematics/octave/octave-11.1.0.ebuild
index 5306b40fd94d..5319a5e06e53 100644
--- a/sci-mathematics/octave/octave-11.1.0.ebuild
+++ b/sci-mathematics/octave/octave-11.1.0.ebuild
@@ -104,6 +104,7 @@ BDEPEND="
 
 PATCHES=(
 	"${FILESDIR}"/${PN}-5.1.0-pkgbuilddir.patch
+	"${FILESDIR}"/${PN}-9.2.0-fix-qt-help-generator-for-texinfo-7.3.patch
 )
 
 src_prepare() {
diff --git a/sci-mathematics/octave/octave-9.2.0-r2.ebuild b/sci-mathematics/octave/octave-9.2.0-r2.ebuild
index 3bdc64c9c564..e048af37cb94 100644
--- a/sci-mathematics/octave/octave-9.2.0-r2.ebuild
+++ b/sci-mathematics/octave/octave-9.2.0-r2.ebuild
@@ -104,6 +104,7 @@ BDEPEND="
 
 PATCHES=(
 	"${FILESDIR}"/${PN}-5.1.0-pkgbuilddir.patch
+	"${FILESDIR}"/${PN}-9.2.0-fix-qt-help-generator-for-texinfo-7.3.patch
 )
 
 src_prepare() {