On Wed, Oct 12, 2016 at 07:28:20PM +0530, Abhay Sachan wrote:
> Hi,
> I tried building latest btrfs progs on CentOS 6, "./configure" failed
> with the error:
> checking for FIEMAP_EXTENT_SHARED defined in linux/fiemap.h... no
> configure: error: no definition of FIEMAP_EXTENT_SHARED found
> Any ideas what am I lacking in the system?

Can you please test the build from current devel branch? [1] Configure
will just print a warning if the flag is not defined, 'btrfs fi du' will
print another warning if it's running on kernel < 2.6.33 .

[1] git://github.com/kdave/btrfs-progs (branch devel)
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