Article View: comp.std.c
Article #4556Re: static and extern, and a variable be both ?
From: Jerry Coffin
Date: Thu, 04 Jan 1996 17:33
Date: Thu, 04 Jan 1996 17:33
34 lines
1905 bytes
1905 bytes
ahicks@netcom.com (Aaron Hicks at Netcom) wrote:
> After much looking and little finding I have come to ask for your
>assistance. I'm working on a project in which we believed the best way
>to insure a 500K array was allocated corectly was to declare it as static
>and then when we needed to use it in a nother program to declare it there as
>an extern. When we did this we got a variable undefined error during the
>linking of the programs. Now my question is this a standard C compiler
>thing or is this compiler wrong. Below are the relative parts of the code:
[ ... ]
>I have found that this will work if I just do not declare the array as
>a static in the first place. It then will work fine, but we a slightly
>afraid that if we do not declare this as static when it is declared there
>may not be enough memory left after the other parts of this program have
>ran of a while.
As long as the varaible is declared at file scope (i.e. outside any
function), it'll have static storage duration (which seems to be what
you want.) If you use `static' explicitly, it will give the identifier
internal linkage, which means it will only be visible within that
translation unit. (i.e. that source module)
In short, it sounds like leaving the `static' off is exactly what you
need, and shouldn't cause a problem.
Later,
Jerry.
/* I can barely express my own opinions; I certainly can't
* express anybody else's.
*
* The universe is a figment of its own imagination.
*/
Technical Details
Message-ID:
<4cgv6u$ogu@natasha.rmii.com>Path:
arc1-ca.pugleaf.net!news.rmii.com!usenetReferences:
<ahicksDKMG56.K20@netcom.com>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!news.rmii.com!usenet From: jcoffin@rmii.com (Jerry Coffin) Newsgroups: comp.std.c Subject: Re: static and extern, and a variable be both ? Date: Thu, 04 Jan 1996 17:33:43 GMT Organization: TAEUS Message-ID: <4cgv6u$ogu@natasha.rmii.com> References: <ahicksDKMG56.K20@netcom.com> NNTP-Posting-Host: slip8152.rmii.com X-Newsreader: Forte Free Agent 1.0.82