Re: lib/45020: strtold(3) does not detect NaN

[christos%zoulas.com@localhost (Christos Zoulas)]

The following reply was made to PR lib/45020; it has been noted by GNATS.

From: christos%zoulas.com@localhost (Christos Zoulas)
To: gnats-bugs%NetBSD.org@localhost, lib-bug-people%netbsd.org@localhost, 
        gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Cc: 
Subject: Re: lib/45020: strtold(3) does not detect NaN
Date: Sat, 4 Jun 2011 06:51:46 -0400

 On Jun 4,  9:55am, jruohonen%iki.fi@localhost (Jukka Ruohonen) wrote:
 -- Subject: lib/45020: strtold(3) does not detect NaN
 
 | >Description:
 | 
 | The saga of strtod(3) bugs continues: the long double variant does not
 | detect NaN on amd64.
 | 
 | >How-To-Repeat:
 | 
 |      ...
 | 
 |      long double ld;
 | 
 |      ld = strtold("NaN", NULL);
 | 
 |      if (isnan(ld) == 0)
 |              printf("fail");
 | 
 |      ...
 
 Looks like a compiler bug to me. Either use -ffloat-store, or call isnanl()
 directly.
 
 christos