[Buildroot] [Bug 1213] New: Move .config into output directory

[bugzilla at busybox.net <bugzilla@busybox.net>]

https://bugs.busybox.net/show_bug.cgi?id=1213

           Summary: Move .config into output directory
           Product: buildroot
           Version: unspecified
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: Other
        AssignedTo: unassigned at buildroot.uclibc.org
        ReportedBy: will_wagner at carallon.com
                CC: buildroot at uclibc.org
   Estimated Hours: 0.0


Created an attachment (id=1177)
 --> (https://bugs.busybox.net/attachment.cgi?id=1177)
Move .config into output directory

Currently buildroot places most files generated by the build in the output
directory (which can be overriden with O=). However a number of files remain
within the buildroot tree.

These are:
.auto.deps (incidentally this no longer seems to be used)
.config
.config.cmd
.config.old
package/config/buildroot-config (which then gets copied into output/build) 

This is a problem if you want to use the same buildroot directory to
simultaneously build two different targets to locations elsewhere in the
filesystem with O= 

The patch modifies config and the top level Makefile so that all files reside
in the output folder. Feedback welcome. Could go further and tidy some things
up as well but have not done so. In particular we generate .auto.deps but never
seem to use it. Also have not updated
package/config/kconfig-to-buildroot2.patch as the previous patch was old and
the instructions on how to generate it were incorrect.


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