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Subject: [Bug libstdc++/96083] Clang can't compile <ext/throw_allocator.h>:
 error: use of undeclared identifier '__builtin_sprintf'
Date: Mon, 11 Jan 2021 15:04:42 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96083

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jonathan Wakely
<redi@gcc.gnu.org>:

https://gcc.gnu.org/g:93beee71a5ba5ee97a072d94780b140ae159fd74

commit r10-9250-g93beee71a5ba5ee97a072d94780b140ae159fd74
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Wed Dec 16 13:50:34 2020 +0000

    libstdc++: Only use __builtin_sprintf if supported [PR 96083]

    Clang doesn't support __builtin_sprintf, so use std::sprintf instead.

    libstdc++-v3/ChangeLog:

            PR libstdc++/96083
            * include/ext/throw_allocator.h: Use __has_builtin to check for
            __builtin_sprintf support, and use std::sprintf if necessary.

    (cherry picked from commit 96d9670e88333d8896a5d2f2bb0403c1e2ad19ab)=