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From: Richard Purdie <richard.purdie@linuxfoundation.org>
To: Denys Dmytriyenko <denis@denix.org>
Date: Wed, 21 Jan 2015 21:23:35 +0000
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Cc: Paul Eggleton <paul.eggleton@linux.intel.com>, yocto@yoctoproject.org,
	Otavio Salvador <otavio@ossystems.com.br>, Denys Dmytriyenko <denys@ti.com>
Subject: Re: Difference between target, cross, native and nativesdk.
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On Wed, 2015-01-21 at 14:27 -0500, Denys Dmytriyenko wrote:
> On Wed, Jan 21, 2015 at 11:23:38AM -0200, Raphael Philipe wrote:
> > I was explained about the difference in a different way.
> > 
> > cross generates binary for the host architecture. But the way this
> > binary is generated depends of the target architecture. Native
> > generated binaries that do not depend of the target architecture.
> 
> Pretty much.
> 
> But another big difference is that -native packages do not generate IPK, RPM 
> or DEB, while -nativesdk, -cross, -crosssdk and -cross-canadian do.

-cross and -crosssdk do not generate packages.

Another way to think of this is:

"native" build once

"cross" build once per target, run on native, output code for target

"crosssdk" build once per sdk, run on native, output code for sdk

"cross-canadian" build once per sdk, run on sdk, output code for target

Whilst native.bbclass and nativesdk.bbclass are useful generally,
cross.bbclass is only useful for GNU tool projects like
binutils/gcc/gdb.

Cheers,

Richard