gcc: Fix typo in increment expression in unicode from libstdc++

This issue is seen when libstdc++ headers are used by clang18
see - https://github.com/llvm/llvm-project/issues/92586

(From OE-Core rev: 1506b779014b09ffd618b2e5d95aa00ff91d6f45)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 77 insertions, 0 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-14.1.inc b/meta/recipes-devtools/gcc/gcc-14.1.inc
index b057e570f3..17a9c51d71 100644
--- a/meta/recipes-devtools/gcc/gcc-14.1.inc
+++ b/meta/recipes-devtools/gcc/gcc-14.1.inc
@@ -68,6 +68,7 @@ SRC_URI = "${BASEURI} \
            file://0023-Fix-install-path-of-linux64.h.patch \
            file://0024-Avoid-hardcoded-build-paths-into-ppc-libgcc.patch \
            file://0025-gcc-testsuite-tweaks-for-mips-OE.patch \
+           file://0026-libstdc-Fix-typo-in-_Grapheme_cluster_view-_Iterator.patch \
 "
 
 S = "${TMPDIR}/work-shared/gcc-${PV}-${PR}/${SOURCEDIR}"
diff --git a/meta/recipes-devtools/gcc/gcc/0026-libstdc-Fix-typo-in-_Grapheme_cluster_view-_Iterator.patch b/meta/recipes-devtools/gcc/gcc/0026-libstdc-Fix-typo-in-_Grapheme_cluster_view-_Iterator.patch
new file mode 100644
index 0000000000..5a465b8c95
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc/0026-libstdc-Fix-typo-in-_Grapheme_cluster_view-_Iterator.patch
@@ -0,0 +1,76 @@
+From c9e05b03c18e898be604ab90401476e9c473cc52 Mon Sep 17 00:00:00 2001
+From: Jonathan Wakely <jwakely@redhat.com>
+Date: Thu, 16 May 2024 17:15:55 +0100
+Subject: [PATCH] libstdc++: Fix typo in _Grapheme_cluster_view::_Iterator
+ [PR115119]
+
+libstdc++-v3/ChangeLog:
+
+        PR libstdc++/115119
+        * include/bits/unicode.h (_Iterator::operator++(int)): Fix typo
+        in increment expression.
+        * testsuite/ext/unicode/grapheme_view.cc: Check post-increment
+        on view's iterator.
+
+Drop it when upgrading to 14.2
+
+Upstream-Status: Backport [https://github.com/gcc-mirror/gcc/commit/c9e05b03c18e898be604ab90401476e9c473cc52]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ libstdc++-v3/include/bits/unicode.h                 |  6 ++++--
+ libstdc++-v3/testsuite/ext/unicode/grapheme_view.cc | 11 +++++++++++
+ 2 files changed, 15 insertions(+), 2 deletions(-)
+
+diff --git a/libstdc++-v3/include/bits/unicode.h b/libstdc++-v3/include/bits/unicode.h
+index 46238143fb6..a14a17c5dfc 100644
+--- a/libstdc++-v3/include/bits/unicode.h
++++ b/libstdc++-v3/include/bits/unicode.h
+@@ -34,10 +34,12 @@
+ #include <array>
+ #include <bit>      // bit_width
+ #include <charconv> // __detail::__from_chars_alnum_to_val_table
++#include <string_view>
+ #include <cstdint>
+ #include <bits/stl_algo.h>
+ #include <bits/stl_iterator.h>
+-#include <bits/ranges_base.h>
++#include <bits/ranges_base.h> // iterator_t, sentinel_t, input_range, etc.
++#include <bits/ranges_util.h> // view_interface
+ 
+ namespace std _GLIBCXX_VISIBILITY(default)
+ {
+@@ -802,7 +804,7 @@ inline namespace __v15_1_0
+        operator++(int)
+        {
+          auto __tmp = *this;
+-         ++this;
++         ++*this;
+          return __tmp;
+        }
+ 
+diff --git a/libstdc++-v3/testsuite/ext/unicode/grapheme_view.cc b/libstdc++-v3/testsuite/ext/unicode/grapheme_view.cc
+index ac1e8c50b05..a3bb36e14b8 100644
+--- a/libstdc++-v3/testsuite/ext/unicode/grapheme_view.cc
++++ b/libstdc++-v3/testsuite/ext/unicode/grapheme_view.cc
+@@ -83,10 +83,21 @@ test_breaks()
+   VERIFY( iter == gv.end() );
+ }
+ 
++constexpr void
++test_pr115119()
++{
++  // PR 115119 Typo in _Grapheme_cluster_view::_Iterator::operator++(int)
++  uc::_Grapheme_cluster_view gv(" "sv);
++  auto it = std::ranges::begin(gv);
++  it++;
++  VERIFY( it == std::ranges::end(gv) );
++}
++
+ int main()
+ {
+   auto run_tests = []{
+     test_breaks();
++    test_pr115119();
+     return true;
+   };
+