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

The following reply was made to PR standards/51044; it has been noted by GNATS.

From: Bruce Lilly <>
Subject: Re: standards/51044 (NetBSD cdefs.h defines __func__ incompatibly
 with C99)
Date: Wed, 10 Aug 2016 14:48:01 -0400

 On Wed, Aug 10, 2016 at 2:17 PM,  <> 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.

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