From: Mike Frysinger <vapier@gentoo.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] Why cmd_tbl_t is referenced as extern in defining __u_boot_cmd_start?
Date: Tue, 9 Nov 2010 09:20:25 -0500 [thread overview]
Message-ID: <201011090920.25918.vapier@gentoo.org> (raw)
In-Reply-To: <30115036.post@talk.nabble.com>
On Tuesday, November 02, 2010 11:56:31 legendbb wrote:
> line 64 and 65 in include/command.h
>
> extern cmd_tbl_t __u_boot_cmd_start;
> extern cmd_tbl_t __u_boot_cmd_end;
>
> definition of cmd_tbl_t is just one line above these. Why "extern" is used?
basic C question ? if you dont have the extern, you'd be declaring storage
for two variables instead of references to the symbols elsewhere.
-mike
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prev parent reply other threads:[~2010-11-09 14:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-02 15:56 [U-Boot] Why cmd_tbl_t is referenced as extern in defining __u_boot_cmd_start? legendbb
2010-11-09 14:20 ` Mike Frysinger [this message]
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