Bug 74687 – [Qt] Incremental build problem revealed by r102981

• Status: RESOLVED
• Resolution: FIXED
• Component: Tools / Tests

[Csaba Osztrogonác]

This change http://trac.webkit.org/changeset/102981/trunk/Source/WebCore/mathml/mathattrs.in
caused a build fail on the Qt bot, because the necessarry generated file wasn't
regenerated. It must be a bug in the Qt build system. I'll check it.

Thanks for you kicked the bot with touching a file. ;)

[Ádám Kallai]

Created attachment 123550 [details]
proposed patch

It is necessary to set mathattrs.in dependency for generating MathMLNames.cpp file. I added depend this file /Source/WebCore/DerivedSources.pri.

[Tor Arne Vestbø]

Comment on attachment 123550 [details]
proposed patch

While the fix is correct it unfortunately doesn't solve the general problem, for exxample is $$PWD/mathml/mathtags.in still left out of depends. And there's a bunch of other generators that have the same problem.

The better approach I think would be to add code in default_post.prf that walks every argument of commands and checks if it's a file that exists, and if so, adds it to depends. That should ideally fix it for all of these cases.

Feel free to have a stab at it, or assign the bug to me and I'll have a look. Thanks!

[Csaba Osztrogonác]

(In reply to comment #2)
> (From update of attachment 123550 [details])
> While the fix is correct it unfortunately doesn't solve the general problem, for exxample is $$PWD/mathml/mathtags.in still left out of depends. And there's a bunch of other generators that have the same problem.

The correct is absolutely correct for this bug. And $$PWD/mathml/mathtags.in isn't missing from the dependency list, because MATHML_NAMES is $$PWD/mathml/mathtags.in which is the input of this generator.

> The better approach I think would be to add code in default_post.prf that walks every argument of commands and checks if it's a file that exists, and if so, adds it to depends. That should ideally fix it for all of these cases.

> Feel free to have a stab at it, or assign the bug to me and I'll have a look. Thanks!

The idea is good, but I'm not sure if it works always. Let's try it.

But I don't think if we shouldn't land this trivial, necssarry and correct fix because maybe we can do a general fix sometimes in the future. I filed a new bug report for this future development: https://bugs.webkit.org/show_bug.cgi?id=76902

[Csaba Osztrogonác]

(In reply to comment #3)

> The correct is absolutely correct for this bug. And $$PWD/mathml/mathtags.in isn't missing from the dependency list, because MATHML_NAMES is $$PWD/mathml/mathtags.in which is the input of this generator.

I should have reread my comment. :) s/The correct/The fix/g

[Csaba Osztrogonác]

Comment on attachment 123550 [details]
proposed patch

r=me to decrease the number of possible incremental build bugs in the future.

[Csaba Osztrogonác]

Comment on attachment 123550 [details]
proposed patch

Clearing flags on attachment: 123550

Committed r105731: <http://trac.webkit.org/changeset/105731>

[Csaba Osztrogonác]

All reviewed patches have been landed.  Closing bug.