Bug 41291 - An executable named "Xamarin_iOS.exe" causes native build failure
Summary: An executable named "Xamarin_iOS.exe" causes native build failure
Alias: None
Product: iOS
Classification: Xamarin
Component: Tools ()
Version: master
Hardware: PC Mac OS
: --- enhancement
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2016-05-24 15:46 UTC by Rolf Bjarne Kvinge [MSFT]
Modified: 2016-05-24 17:32 UTC (History)
2 users (show)

Is this bug a regression?: ---
Last known good build:

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Description Rolf Bjarne Kvinge [MSFT] 2016-05-24 15:46:44 UTC
An executable named "Xamarin_iOS.exe" causes this:

	MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_mono_aot_module_Xamarin_iOS_info'.
	MTOUCH: error MT5213: Duplicate symbol in: [...]/iOS/obj/iPhone/Release/mtouch-cache/Xamarin_iOS.exe.arm64.o (Location related to previous error)
	MTOUCH: error MT5213: Duplicate symbol in: [...]/iOS/obj/iPhone/Release/mtouch-cache/Xamarin.iOS.dll.arm64.o (Location related to previous error)

We already have a check for assemblies named as the executable, but it looks like the underscore is circumventing that check.

Maybe we should keep a list of the mono_aot_module_* symbol names generated, and detect duplicates there (and show the corresponding error).
Comment 1 Sebastien Pouliot 2016-05-24 17:21:31 UTC
> and detect duplicates there 

Not sure what you mean by "there". 

AOT time ? It's too late to fail a build for something we can detect a lot earlier. Even more since such app could have been working for quite a while in the JIT/simulator.

We should apply the same transforms (there's likely many other characters too) as the AOT compiler before doing the duplicate comparison.
Comment 2 Rolf Bjarne Kvinge [MSFT] 2016-05-24 17:32:23 UTC
Yeah, you're right, it's best to detect this as soon as possible, and not at AOT time.