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Re: Conditional warning
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Re: Conditional warning


  • Subject: Re: Conditional warning
  • From: Chris Espinosa <email@hidden>
  • Date: Wed, 8 Oct 2008 19:56:56 -0700


On Oct 8, 2008, at 7:29 PM, Ben Lachman wrote:

I'm trying to stick a conditional #warning in one of the header's included from my projects .pch. I'd like this warning only to get fired once per compile so I have it enclosed in a conditional, but this doesn't seem to be working. Is there a way to only have a warning fire just once? These are my current (not working) compiler directives.

#define SOUSCHEF_DEBUG 1

#if SOUSCHEF_DEBUG
	#ifndef SOUSCHEF_DEBUG_WARN_ONCE
		#define SOUSCHEF_DEBUG_WARN_ONCE
		#warning Debug Flag Enabled
	#endif
#endif

Every compilation unit (source file) processes all the lines in all the headers it includes. If you put this in a file in the #include chain of every source file in your project, you'll get the warning triggered once per source file.


Two notions:
1) Create a special dependent target with one dummy source file in it that has this #warning in the source, and make your target dependent on it.
2) Add a Run Script Build Phase to your project to just echo the warning to the build transcript on every build, conditional on the $ (CONFIGURATION) build setting.


Chris
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 >Conditional warning (From: Ben Lachman <email@hidden>)

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