Re: standards/51044 (NetBSD cdefs.h defines __func__ incompatibly with C99)

[Bruce Lilly <bruce.lilly%gmail.com@localhost>]

On Wed, Aug 10, 2016 at 2:17 PM,  <dholland%netbsd.org@localhost> wrote:

> You are seriously complaining about not conforming to C99 when you select
> C89?

No, I am complaining that the NetBSD headers trample on __func__ provided
by compilers, and redefine it as __PRETTY_FUNCTION__ instead of the
compiler's definition, based on a __GNUC_PREREQ__ macro, and that
results in different behavior when compiling with clang on NetBSD only
(Linux, illumos headers do not trample on __func__).  gcc happens to
define the non-standard __PRETTY_FUNCTION__ as equivalent to
__FUNCTION__, whereas clang does not.  As __PRETTY_FUNCTION__
is non-standard, and differs among gcc-compatible compilers it should
probably not be used to redefine __func__, nor is it useful in assertion
messages, for the same reasons of incompatibility.