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doc: add note to parallelize make

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Adds a note to the BUILDING doc to encourage parallelizing make. When I
first built node I didn't know this trick and thought that the build was
just stuck in an infinite loop after waiting for 10 minutes.

Refs: https://github.com/nodejs/node/issues/8286
Refs: https://github.com/nodejs/node/pull/9881

PR-URL: https://github.com/nodejs/node/pull/9961
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
This commit is contained in:
Jonathan Darling 2016-12-01 10:47:46 -06:00 committed by Jeremiah Senkpiel
parent d8c7534fcd
commit cffbb326a2
1 changed files with 9 additions and 1 deletions
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10
BUILDING.md
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@ -40,9 +40,17 @@ To build Node.js:
```console
$ ./configure
$ make
$ make -j4
```
Running `make` with the `-j4` flag will cause it to run 4 compilation jobs
concurrently which may significantly reduce build time. The number after `-j`
can be changed to best suit the number of processor cores on your machine. If
you run into problems running `make` with concurrency, try running it without
the `-j4` flag. See the
[GNU Make Documentation](https://www.gnu.org/software/make/manual/html_node/Parallel.html)
for more information.
Note that the above requires that `python` resolve to Python 2.6 or 2.7 and not a newer version.
To run the tests: