[Bug libstdc++/96083] New: Clang can't compile <ext/throw_allocator.h>: error: use of undeclared identifier '__builtin_sprintf'

[Bug libstdc++/96083] New: Clang can't compile <ext/throw_allocator.h>: error: use of undeclared identifier '__builtin_sprintf'

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96083

            Bug ID: 96083
           Summary: Clang can't compile <ext/throw_allocator.h>: error:
                    use of undeclared identifier '__builtin_sprintf'
           Product: gcc
           Version: 10.1.1
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: redi at gcc dot gnu.org
  Target Milestone: ---

$ clang++   -include bits/extc++.h -x c++ - </dev/null
In file included from <built-in>:1:
In file included from
/usr/bin/../lib/gcc/x86_64-redhat-linux/9/../../../../include/c++/9/x86_64-redhat-linux/bits/extc++.h:69:
/usr/bin/../lib/gcc/x86_64-redhat-linux/9/../../../../include/c++/9/ext/throw_allocator.h:316:7:
error: use of undeclared identifier '__builtin_sprintf'
      __builtin_sprintf(buf, "%lu", l);
      ^
/usr/bin/../lib/gcc/x86_64-redhat-linux/9/../../../../include/c++/9/ext/throw_allocator.h:321:7:
error: use of undeclared identifier '__builtin_sprintf'
      __builtin_sprintf(buf, "%lu", l);
      ^
/usr/bin/../lib/gcc/x86_64-redhat-linux/9/../../../../include/c++/9/ext/throw_allocator.h:325:7:
error: use of undeclared identifier '__builtin_sprintf'
      __builtin_sprintf(buf, "%p", ref.first);
      ^
/usr/bin/../lib/gcc/x86_64-redhat-linux/9/../../../../include/c++/9/ext/throw_allocator.h:338:7:
error: use of undeclared identifier '__builtin_sprintf'
      __builtin_sprintf(buf, "%lu", l);
      ^
/usr/bin/../lib/gcc/x86_64-redhat-linux/9/../../../../include/c++/9/ext/throw_allocator.h:342:7:
error: use of undeclared identifier '__builtin_sprintf'
      __builtin_sprintf(buf, "%p", ref.first);
      ^
/usr/bin/../lib/gcc/x86_64-redhat-linux/9/../../../../include/c++/9/ext/throw_allocator.h:575:4:
error: use of undeclared identifier '__builtin_sprintf'
          __builtin_sprintf(buf, "%f", random);
          ^
6 errors generated.

[Bug libstdc++/96083] Clang can't compile <ext/throw_allocator.h>: error: use of undeclared identifier '__builtin_sprintf'

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96083

--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:

https://gcc.gnu.org/g:96d9670e88333d8896a5d2f2bb0403c1e2ad19ab

commit r11-6146-g96d9670e88333d8896a5d2f2bb0403c1e2ad19ab
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::sprtinf if necessary.

[Bug libstdc++/96083] Clang can't compile <ext/throw_allocator.h>: error: use of undeclared identifier '__builtin_sprintf'

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96083

--- 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)

[Bug libstdc++/96083] Clang can't compile <ext/throw_allocator.h>: error: use of undeclared identifier '__builtin_sprintf'

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96083

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
   Target Milestone|---                         |9.4
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 9.4 and 10.3

The gcc-9 branch commit didn't show up here, but was r9-9173