[Bug 286342] libc++: compiling with -fmodules broken when including <locale>

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=286342

--- Comment #11 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=c809b0184d0a6543bc5327d4252fa56a07ce4689

commit c809b0184d0a6543bc5327d4252fa56a07ce4689
Author:     Jordan Gordeev <jgopensource@proton.me>
AuthorDate: 2025-05-18 19:55:05 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2025-05-18 20:04:42 +0000

    libc++: fix compiling <locale> with -fmodules

    In /usr/include/c++/v1/__locale_dir/locale_base_api.h, xlocale.h is
    included without first including stdio.h and stdlib.h, which causes
    functions like strtoll_l() or sscanf_l() to not be declared.

    When compiling with -fmodules, locale_base_api.h is processed separately
    due to a declaration in /usr/include/c++/v1/module.modulemap, and this
    will cause errors due to the above undeclared symbols.

    Meanwhile, upstream has substantially reorganized this part of libc++'s
    headers, so apply a minimalistic workaround: specifically when compiling
    with -fmodules, add includes of stdio.h and stdlib.h.

    PR:             286342
    MFC after:      1 week

 .../llvm-project/libcxx/include/__locale_dir/locale_base_api.h    | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

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