From: "deckerben" <bdeck AT lycos DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
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Subject: Re: wierd math.h error ---isinff, "long"?
Date: Wed, 11 Jun 2003 21:10:59 +0200
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"Martin Stromberg" <eplmst AT lu DOT erisoft DOT se> wrote in message
news:bc6ikb$s6a$1 AT antares DOT lu DOT erisoft DOT se...
> deckerben (bdeck AT lycos DOT co DOT uk) wrote:
>
> : "Hans-Bernhard Broeker" <broeker AT physik DOT rwth-aachen DOT de> wrote in message
> : news:bc470i$1cb$1 AT nets3 DOT rz DOT RWTH-Aachen DOT DE...
> : > deckerben <bdeck AT lycos DOT co DOT uk> wrote:
> : >
> : > > /dev/d/usr/djgpp/include/math.h:148: parse error before "long"
> : > > /dev/d/usr/djgpp/include/math.h:149: parse error before "long"
> : > > /dev/d/usr/djgpp/include/math.h:150: parse error before "long"
> : >
> : > > When these lines in math.h look like:
> : > > extern int isinff(float);
> : > > extern int isnanf(float);
> : > > extern int finitef(float);
> Does it help to switch the #include order?

Well, the source code calls four internal includes that call two other
masters which call dozens of DJGPP headers, and probably math.h in one place
and ieeefp.h in the other... At any rate, many packages that requires both
of these headers seems to fail...

> Ultimately things should be moved to C99 compliance, which means
> isinff can be removed (unless it must be kept for backwards
> compatibility) because then the macro isinf should be used. (I have
> isinf coded already, but not properly integrated and no time at the
> moment.)

After your comments, I simply #ifdef'ed the three lines out from ieeefp.h
and let it use the prototypes in math.h. No more errors (although the
original error did say '/dev/d/usr/djgpp/include/math.h:150: parse error
before "long"
'.) The function should probably be kept for backward compatibility.

> Perhaps removing the function declaration(s) would be sufficient? But
> then you must be careful not to pass non-floats to it, I guess.


I'll keep it in mind. Thanks.

Ben