[Webkit-unassigned] [Bug 117708] touching any idl rebuilds all derived sources

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=117708





--- Comment #4 from Christophe Dumez <dchris at gmail.com>  2013-06-17 11:30:41 PST ---
FYI, Blink uses the same optimization. However, it is only enabled with ninja with the following explanation:
# The bindings generator can not write generated files if they are identical
# to the already existing file – that way they don't need to be recompiled.
# However, a reverse dependency having a newer timestamp than a
# generated binding can confuse some build systems, so only use this on
# ninja which explicitly supports this use case (gyp turns all actions into
# ninja restat rules).

I guess we could have a new script argument like --writeOnlyIfChanged in case we want to disable this for some build systems if we notice issues.

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