numam-dpdk/mk/internal
Olivier Matz feb9f680cd mk: optimize directory dependencies
Before this patch, the management of dependencies between directories
had several issues:

- the generation of .depdirs, done at configuration is slow: it can take
  more than one minute on some slow targets (usually ~10s on a standard
  PC without -j).

- for instance, it is possible to express a dependency like:
  - app/foo depends on lib/librte_foo
  - and lib/librte_foo depends on app/bar
  But this won't work because the directories are traversed with a
  depth-first algorithm, so we have to choose between doing 'app' before
  or after 'lib'.

- the script depdirs-rule.sh is too complex.

- we cannot use "make -d" for debug, because the output of make is used for
  the generation of .depdirs.

This patch moves the DEPDIRS-* variables in the upper Makefile, making
the dependencies much easier to calculate. A DEPDIRS variable is still
used to process library dependencies in LDLIBS.

After this commit, "make config" is almost immediate.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Tested-by: Robin Jarry <robin.jarry@6wind.com>
Tested-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
2017-03-27 23:28:43 +02:00
..
rte.build-post.mk remove trailing whitespaces 2014-06-11 00:29:34 +02:00
rte.build-pre.mk remove trailing whitespaces 2014-06-11 00:29:34 +02:00
rte.clean-post.mk remove trailing whitespaces 2014-06-11 00:29:34 +02:00
rte.clean-pre.mk remove trailing whitespaces 2014-06-11 00:29:34 +02:00
rte.compile-post.mk remove trailing whitespaces 2014-06-11 00:29:34 +02:00
rte.compile-pre.mk drivers: rename register macro prefix 2016-10-14 01:49:32 +02:00
rte.extvars.mk mk: fix error message 2016-03-03 11:36:32 +01:00
rte.install-post.mk scripts: move to buildtools 2017-01-04 21:17:32 +01:00
rte.install-pre.mk remove trailing whitespaces 2014-06-11 00:29:34 +02:00