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Re: log2 on MinGW

From: John W. Eaton
Subject: Re: log2 on MinGW
Date: Mon, 04 Nov 2013 13:52:46 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.12) Gecko/20130116 Icedove/10.0.12

On 11/04/2013 01:47 PM, Rik wrote:

Can you test the solution which is in Mercurial with MinGW?  It is possible
that gnulib doesn't identify the frexp on Windows as being buggy (since it
works for ordinary values) in which case it won't replace it with the
correct version.

As far as I can tell, gnulib should replace frexp for MinGW.  Looking
at gnulib-hg/m4/frexp.m4, there seem to be checks for -0 and Inf:

dnl Test whether frexp() works also on denormalized numbers (this fails e.g. on dnl NetBSD 3.0), on infinite numbers (this fails e.g. on IRIX 6.5 and mingw),
  dnl and on negative zero (this fails e.g. on NetBSD 4.99 and mingw).


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