From: Keith.S.Thompson+u@gmail.com

David Brown  writes:
[...]

Context: %wN and %wfN printf length modifier, new in C23.

> gcc has supported the format, along with much of C23, since gcc 13,
> and ARM's gcc-based toolchain version 13.2 is from October 2023.  (The
> current version is 15.2 from December 2025.)  But I don't know about
> library support - that is a very different matter.  (Compiler support
> for printf really just means checking the format specifiers match the
> parameters.)

Of course printf is implemented in the library, not in the compiler.

gcc has had format checking for %wN and %wfN since release 13, but
that's useless in the absence of library support.

Support in glibc was added 2023-06-19 and released in version 2.39.
Other C library implementations may or may not support it.

[...]

--
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */

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