[Qt-interest] qmake "-=" operator on the command line

[Thiago Macieira]

On Sunday, 29 de May de 2011 17:28:26 Nikos Chantziaras wrote:
> Is the following supposed to work?
> 
>    qmake CONFIG-=warn_off myproject.pro
> 
> Because it doesn't.  "+=" works fine, it's only "-=" that doesn't.

You have to be more precise. When you say "it doesn't work", we don't know 
exactly what you meant.

In this case, I'm going to guess that you wanted to enable warnings (by 
removing the disable-warnings option). And warnings were still not enabled.

However, the command you ran probably works just fine. It's your expectation of 
what it does that is incorrect. I'm sure qmake removed any "warn_off" 
configuration that was active. The questions you have to ask are:

1) at what point is any "warn_off" introduced, relative to the processing of 
the command-line? before, after or never?

2) could it be that the warnings are disabled because nothing enables it? 
Removing an option that resets to the default when the default is already 
active is a no-op.

For more information, run:
	qmake -d -d CONFIG-=warn_off myproject.pro

And search for "warn_off" in the output. You'll be able to answer both 
questions.

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
      PGP/GPG: 0x6EF45358; fingerprint:
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