[llvm-bugs] [Bug 10478] undefined functions asprintf_l, snprintf_l

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=10478

Eric Fiselier <eric at efcs.ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |eric at efcs.ca
         Resolution|---                         |INVALID

--- Comment #6 from Eric Fiselier <eric at efcs.ca> ---
The compiler is expected and required to predefine the libc feature macros
required by the C++ STL, and it does. On Unix systems _GNU_SOURCE is a builtin
macro when compiling C++, which enables essentially all libc extensions.

It sn unfortunately not compatible for users to restrict libc to anything less
than the default feature set.

Also there is no such thing as defining a libc feature macro "for the duration"
of some header. That's fundamentally not how headers work.

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