[Pkg-cmake-team] Bug#1102350: libstdc++-15-dev: libstdc++-modules.json points at wrong location (was: cmake 4.0 couldn't find correct std module source file)

[Timo Röhling]

Control: reassign 1102350 libstdc++-15-dev
Control: retitle 1102350 libstdc++-15-dev: libstdc++-modules.json points at wrong location

* Leen Hawk <leenhawk at leenhawk.com> [2025-04-08 13:47]:
>I have change the `CMakeCXXCompiler.cmake`:
>```
>target_sources(__CMAKE::CXX23
>   INTERFACE
>   FILE_SET std TYPE CXX_MODULES
>     BASE_DIRS  "/usr/lib/gcc/x86_64-linux-gnu/15/../include/c++/15/bits"
>     FILES  "/usr/lib/gcc/x86_64-linux-gnu/15/../include/c++/15/bits/std.cc" "/usr/lib/gcc/x86_64-linux-gnu/15/../include/c++/15/bits/std.compat.cc")
>endif ()
>```
>to
>```
>target_sources(__CMAKE::CXX23
>   INTERFACE
>   FILE_SET std TYPE CXX_MODULES
>     BASE_DIRS  "/usr/include/c++/15/bits"
>     FILES  "/usr/include/c++/15/bits/std.cc" "/usr/include/c++/15/bits/std.compat.cc")
>endif ()
>```
>to fix it. And there is my issue on kitware cmake: 
>https://gitlab.kitware.com/cmake/cmake/-/issues/26609

The source-path in libstdc++-modules.json is broken, and this needs to 
be fixed in gcc-15, not in cmake.

>They have fixed in gentoo and fedora. But debian doesn't.
Nobody filed a bug yet, what do you expect? Especially with an 
unreleased snapshot of gcc that sits in experimental for a good reason.


Cheers
Timo

-- 
⢀⣴⠾⠻⢶⣦⠀   ╭────────────────────────────────────────────────────╮
⣾⠁⢠⠒⠀⣿⡁   │ Timo Röhling                                       │
⢿⡄⠘⠷⠚⠋⠀   │ 9B03 EBB9 8300 DF97 C2B1  23BF CC8C 6BDD 1403 F4CA │
⠈⠳⣄⠀⠀⠀⠀   ╰────────────────────────────────────────────────────╯
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <http://alioth-lists.debian.net/pipermail/pkg-cmake-team/attachments/20250408/5151de68/attachment.sig>