[Bugs] [Bug 1279164] New: Gluster should support out of tree builds

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1279164

            Bug ID: 1279164
           Summary: Gluster should support out of tree builds
           Product: GlusterFS
           Version: mainline
         Component: build
          Assignee: bugs at gluster.org
          Reporter: rtalur at redhat.com
                CC: bugs at gluster.org, gluster-bugs at redhat.com



Description of problem:
Autotools support out-of-tree builds. All the artifacts of the build are
created in the directory where configure was invoked. This allows one to have
parallel builds going on for different archs or on different hosts sharing the
same code from NFS mount etc.

Currently, make install fails for such a use case.


How reproducible:
Always


Steps to Reproduce:
1. Create a build dir at the same level as the source.
example: /root/build and /root/glusterfs.git
2. cd /root/glusterfs.git
3. ./autogen.sh
4. cd ../build
5. ../glusterfs.git/configure
6. make install

Actual results:
make install fails with the following error
"../../../../glusterfs.git/rpc/xdr/src/glusterfs3-xdr.c:34:52: fatal error:
../../../../rpc/xdr/src/glusterfs3-xdr.h: No such file or directory



Expected results:
Build should succeed and install glusterfs

Hints:
It works if the build dir is inside glusterfs.git.
Understand out of tree builds and VPATH w.r.t autotools.
Here is a link I found https://msteveb.github.io/autosetup/user/outoftree/

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