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complex support on solaris?

From: Greg Troxel
Subject: complex support on solaris?
Date: Mon, 14 Jan 2008 07:21:35 -0500
User-agent: Gnus/5.110007 (No Gnus v0.7) Emacs/22.1 (berkeley-unix)

As pkgsrc maintainer of the guile package, I got a bug report about not
building on Solaris.  The submitter doesn't have enough time for guile
any more, but the problem seems to be that Solaris's
/usr/include/complex.h expects the "compilation environment" to provide

Adding this line to numbers.c allowed it to build:

#define _Complex_I 1.0fi

The full PR is at:

So this seems to be a gcc/Solaris interaction where they don't jointly
meet C99.

On NetBSD-current, _Complex_I is provided in complex.h (gcc 4.1.3).

On NetBSD-4, complex.h is not provided at all (gcc 4.1.2).

So I wonder if guile should test for _Complex_I as well in the complex.h
case, and ignore complex.h if _Complex_I isn't defined.

(Separately gcc on Solaris should define it, probably, but I don't fully
understand the standard here.)

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