Hotspot makefile conversion now in build-infra
Magnus Ihse Bursie
magnus.ihse.bursie at oracle.com
Thu Dec 5 10:49:00 UTC 2013
We have just "re-opened" the build-infra project (repos and mailing
list) for the continuation of the conversion of the old build system.
"Hey, wasn't that finished already?" you might be thinking.
Unfortunately, no. Due to constraints, we left out a major component in
the conversion -- hotspot.
I and Erik have been working on a prototype for building Hotspot using
the new build system. It has been developed in a private repository, but
is now ready to be moved to build-infra.
You are of course welcome to try it out, but unless you're eager, it is
probably a bit too early. :-) The current prototype has the following
* It has only been tested (and probably only work) on linux-x86_64.
* It creates roughly the correct collection of files in the
* It compiles roughly the correct set of native files, with roughly the
correct set of compiler flags.
* It creates jar files with roughly the correct contents.
However, the compare script clearly shows that "roughly" does still not
mean "identical". :-)
Going forward, we need to add support for all platforms, and make sure
that the built bits indeed end up identical to the old build system.
There are also several pieces of functionality in the current build
system that needs to be addressed.
On the bright side, we can already (with no optimizations being done
whatsoever) see a slight speed increase (2 min 11 sec vs 2 min 35 sec on
my machine). But most of all, we see a clear reduction of complexity of
the build system. Compare:
magnusi at ../hotspot/make$ wc `find . -type f` | grep total
22527 94124 803058 total
magnusi at .../hotspot/makefiles$ wc `find . -type f` | grep total
753 3686 32369 total
While this will surely double in size before we're done, it's still an
order of magnitude simpler.
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