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From: jfc@athena.mit.edu (John F Carr)
Newsgroups: comp.std.c
Subject: Re: ANSI C standard library
Message-ID: <1991Apr25.232832.21747@athena.mit.edu>
Date: 25 Apr 91 23:28:32 GMT
References: <1991Apr20.092845.14164@watdragon.waterloo.edu> <681@taumet.com> <1991Apr25.201855.27893@watdragon.waterloo.edu>
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In article <1991Apr25.201855.27893@watdragon.waterloo.edu>
	ccplumb@rose.waterloo.edu (Colin Plumb) writes:
>signal.h - without external interrupts, a portable version can be written,
>	except for SIG_DFL, SIG_ERR and SIG_IGN.

You can declare functions and define the macros to be the addresses of
these functions (the function names need to be among those reserved to the
implementation, for example "__sig_dfl").  The address of a function is a
constant expression according to section 3.4 of the standard.

--
    John Carr (jfc@athena.mit.edu)