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Re: do I need "ifdef HAVE_UNISTD_H" if I import unistd?

From: Eric Blake
Subject: Re: do I need "ifdef HAVE_UNISTD_H" if I import unistd?
Date: Mon, 16 May 2011 13:56:46 -0600
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc14 Lightning/1.0b3pre Mnenhy/0.8.3 Thunderbird/3.1.10 
On 05/16/2011 01:53 PM, Sam Steingold wrote:
> DIUC that if I include the sys_time & unistd modules, I can write
> 
> #include <unistd.h>
> #include <sys/time.h>
> 
> instead of
> 
> #ifdef HAVE_SYS_TIME_H
>  #include <sys/time.h>
> #endif
> #ifdef HAVE_UNISTD_H
>   #include <unistd.h>
> #endif
> 
> ??
> 
> the same question for all the other headers...

Absolutely!  In fact, the maintainer-mode module includes the
sc_prohibit_always_true_header_tests to help you check for files where
you can unconditionally include headers guaranteed by gnulib replacements.

-- 
Eric Blake   address@hidden    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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