Re: problems with long double NaN on Irix

[Bruno Haible]

Nelson,

Eric Blake wrote:
> Nelson H. F. Beebe gave me an off-list report of some build failures with
> the latest m4 source code, where test-frexpl, test-isnanl, and
> test-vasprintf-posix all failed on an Irix 6.5 host:
> 
> checking whether isnanl works... no
> checking where to find the exponent in a 'long double'... word 0 bit 20
> 
> test-isnanl.h:67: assertion failed
> /bin/ksh[10]: 691015 Abort(coredump)
> FAIL: test-isnanl-nolibm

I fear I cannot do anything about it since I cannot reproduce it. On IRIX 6.5,
all these tests pass for me with CC=gcc, and I get another failure (for -0.0L)
with CC="cc -O".

Can you debug this a bit?

Bruno