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Re: AC_INCLUDES_DEFAULT does not need to probe for headers that are part


From: Russ Allbery
Subject: Re: AC_INCLUDES_DEFAULT does not need to probe for headers that are part of C89 or POSIX.1 anymore
Date: Wed, 04 Apr 2012 19:41:32 -0700
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.4 (gnu/linux)

Zack Weinberg <address@hidden> writes:

> which, as well as the desired check, does

> checking for ANSI C header files... yes
> checking for sys/types.h... yes
> checking for sys/stat.h... yes
> checking for stdlib.h... yes
> checking for string.h... yes
> checking for memory.h... yes
> checking for strings.h... yes
> checking for inttypes.h... yes
> checking for stdint.h... yes
> checking for unistd.h... yes

> The only tests in that list that are worth doing nowadays are for
> stdint.h and inttypes.h, and I don't think they should be done
> implicitly.

I think you're assuming a hosted target.  I'm not sure that you can make
that assumption.  Can't Autoconf be used to cross-compile software for a
free-standing target, where several of those header files are not
required to exist?

-- 
Russ Allbery (address@hidden)             <http://www.eyrie.org/~eagle/>



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