On Fri Aug 21, 2026 at 02:15:34PM +0200, Theo Buehler wrote:
> Here is the directly libcxx22-related breakage of my first bulk.
>
> There may be a few more because mono got stuck with a weird error. And
> I did not try to build the V8 monsters: codex, deno, chromiums and a few
> others because my machine isn't beefy enough. I don't think anything
> super important is directly affected or hiding behind those. So as far
> as ports are concerned, I think we can land libcxx22 whenever we want:
>
> audio/ncmpcpp
> audio/rubberband
> cad/freecad
> databases/mongodb/44
> games/cataclysm-dda
> games/dxx-rebirth
> games/flightgear/base
> games/keeperrl
> mail/kopano/core
> misc/subsurface
> shells/fish/v3
> textproc/lttoolbox
>
> There are basically two main classes of failures: comparison operators
> and locale things and a few odd ones like fish/v3 and
>
> audio/ncmpcpp
> /usr/include/c++/v1/__algorithm/sift_down.h:49:39: error: no matching
> function for call to object of type 'LocaleBasedSorting'
> 49 | } else if ((__child + 1) < __len && __comp(__first[__child],
> __first[__child + 1])) {
> | ^~~~~~
>
The lambdas are more or less a workaround from me.
I think, the much cleaner fix would be to teach LocaleBasedSorting to
handle all this, but that means digging even depper into the Boost
lib. I don't want go this way. Anyone?
diff --git a/audio/ncmpcpp/patches/patch-src_screens_sel_items_adder_cpp
b/audio/ncmpcpp/patches/patch-src_screens_sel_items_adder_cpp
new file mode 100644
index 00000000000..8f4ca627847
--- /dev/null
+++ b/audio/ncmpcpp/patches/patch-src_screens_sel_items_adder_cpp
@@ -0,0 +1,16 @@
+Fix build with libc++22: Boost operator[] proxy breaks template argument
+deduction in LocaleBasedSorting.
+Index: src/screens/sel_items_adder.cpp
+--- src/screens/sel_items_adder.cpp.orig
++++ src/screens/sel_items_adder.cpp
+@@ -254,7 +254,9 @@ void SelectedItemsAdder::populatePlaylistSelector(Base
+ ));
+ };
+ std::sort(m_playlist_selector.beginV()+begin,
m_playlist_selector.endV(),
+- LocaleBasedSorting(std::locale(),
Config.ignore_leading_the));
++ [cmp = LocaleBasedSorting(std::locale(),
Config.ignore_leading_the)]
++ (const Entry &a, const Entry &b) { return cmp(a, b); });
++
+ if (begin < m_playlist_selector.size())
+ m_playlist_selector.addSeparator();
+ }
diff --git a/audio/ncmpcpp/patches/patch-src_screens_tag_editor_cpp
b/audio/ncmpcpp/patches/patch-src_screens_tag_editor_cpp
new file mode 100644
index 00000000000..24a6fa9d851
--- /dev/null
+++ b/audio/ncmpcpp/patches/patch-src_screens_tag_editor_cpp
@@ -0,0 +1,16 @@
+Fix build with libc++22: Boost operator[] proxy breaks template argument
+deduction in LocaleBasedSorting.
+Index: src/screens/tag_editor.cpp
+--- src/screens/tag_editor.cpp.orig
++++ src/screens/tag_editor.cpp
+@@ -289,7 +289,9 @@ void TagEditor::update()
+ Dirs->highlight(Dirs->size()-1);
+ };
+ std::sort(Dirs->beginV()+1, Dirs->endV(),
+- LocaleBasedSorting(std::locale(),
Config.ignore_leading_the));
++ [cmp = LocaleBasedSorting(std::locale(),
Config.ignore_leading_the)]
++ (const std::pair<std::string, std::string> &a,
++ const std::pair<std::string, std::string> &b) { return
cmp(a, b); });
+ Dirs->display();
+ }
+
