Bug 258769 – Intermittent parallel build failures related to GIR file

• Status: NEW
• Component: CMake

[Jan Palus]

Created attachment 466892 [details]
Patch

Sometimes build fails with errors like:

[100%] Generating WPEWebKit-1.0.typelib
cd /tmp/B.0d8_p500/BUILD/wpewebkit-2.38.6/build-soup2/Source/WebKit && /usr/bin/g-ir-compiler --includedir=/tmp/B.0d8_p500/BUILD/wpewebkit-2.38.6/build-soup2 --output=/tmp/B.0d8_p500/BUILD/wp
ewebkit-2.38.6/build-soup2/WPEWebKit-1.0.typelib /tmp/B.0d8_p500/BUILD/wpewebkit-2.38.6/build-soup2/WPEWebKit-1.0.gir
error parsing file /tmp/B.0d8_p500/BUILD/wpewebkit-2.38.6/build-soup2/WPEWebKit-1.0.gir: Error on line 1 char 1: Document was empty or contained only whitespace

(see attached log)

While most recent occurrence of this issue is related to WPEWebKit, the same behavior was observed for "normal" WebKit as well. Mechanism in question is exactly the same in both.

The reason for the errors are multiple commands generating same GIR file executed in parallel.

See attached patch for more details and fix. Feel free to use it or not. Unfortunately it was not possible to create pull request as the baroque `git-webkit setup` script has hard dependency on keyring which I unfortunately cannot satisfy.

[Jan Palus]

Created attachment 466893 [details]
Log

[Radar WebKit Bug Importer]

<rdar://problem/111953858>

[Jan Palus]

Created attachment 466996 [details]
Patch for non parallel build

Follow up patch for issue found and fixed by Jakub Bogusz with non parallel build.