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Re: Fix for compiling m4 on VAX

From: Paul Eggert
Subject: Re: Fix for compiling m4 on VAX
Date: Tue, 29 Oct 2013 21:14:44 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.0

Eric Blake wrote:
> This change needs to be incorporated upstream in gnulib (cc'd); from
> there it will find its way into the next m4 release.

What compiler is being used, and what macros does this compiler

More generally:

Why is the change needed?  What happens, exactly, if you don't
have the change?

The VAX doesn't have NaNs at all, right?  So that section of
code shouldn't be compiled at all: isnan should simply return
0 without inspecting its argument.  That is the real bug that
needs to get fixed here.

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