Re: btrfs-progs 4.6 won't build on CentOS6

[Jeff Mahoney <jeffm@suse.com>]

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On 6/23/16 9:49 PM, Steven Haigh wrote:
> I've tried to build the new tools for CentOS 6 / Scientific Linux 6 /
> RHEL 6 etc.
> 
> During the build process, I see:
> cmds-fi-du.c: In function 'du_calc_file_space':
> cmds-fi-du.c:330: error: 'FIEMAP_EXTENT_SHARED' undeclared (first use in
> this function)
> cmds-fi-du.c:330: error: (Each undeclared identifier is reported only once
> cmds-fi-du.c:330: error: for each function it appears in.)
> make: *** [cmds-fi-du.o] Error 1
> 
> I'm guessing this is probably due to a different GCC version used? I'm
> guessing this is a simple fix for someone with knowhow... :)
> 

This is due to too-old headers.  That define was added in 2.6.33.

#define FIEMAP_EXTENT_SHARED            0x00002000 /* Space shared with other
                                                    * files. */

Just add that above that routine and you'll be good to go.  The right fix
is to add it to the tools, ofc.

-Jeff

-- 
Jeff Mahoney
SUSE Labs


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