[ovs-git] [openvswitch/ovs] 6b3043: dist-docs: Make GNU make aware of sub-make.

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/openvswitch/ovs
  Commit: 6b3043359519e1716a3d6a57d43c153b8e1d2cf0
      https://github.com/openvswitch/ovs/commit/6b3043359519e1716a3d6a57d43c153b8e1d2cf0
  Author: Ben Pfaff <blp at ovn.org>
  Date:   2016-02-09 (Tue, 09 Feb 2016)

  Changed paths:
    M Makefile.am
    M build-aux/dist-docs

  Log Message:
  -----------
  dist-docs: Make GNU make aware of sub-make.

When GNU make sees that a command to be executed contains the string
$(MAKE), it makes the jobserver that limits parallelism available to
the command.  Otherwise, any sub-make that executes sees that
parallelism is enabled but does not have access to the jobserver, so
it prints a warning and turns off parallel job execution.

This also makes the dist-docs process run the same "make" that is
executed at the top level, in case that's different from the default
"make" found in $PATH.

Signed-off-by: Ben Pfaff <blp at ovn.org>
Acked-by: Russell Bryant <russell at ovn.org>