[uml-devel] Re: Problems in make

[Bodo Stroesser <bstroesser@fujitsu-siemens.com>]

Blaisorblade wrote:
> On Monday 22 November 2004 19:59, Bodo Stroesser wrote:
> 
>>If arch/um/kernel/tt/include/mode-tt.h is changed, make doesn't compile
>>tracer.c, the resulting kernel is inconsistent and crashes!
> 
> 
> This is true for any dependency of files listed in USER_OBJS, which is broken. 
> This problem is known and is pending fixing (and fixing requires designing a 
> clean and Kbuild-supported replacement of USER_OBJS). I fixed it some time 
> ago, around 2.6.1, but the fix was not integrated because it was too 
> invasive.
> 
> So: use always make clean ARCH=um before rebuilding (this even holds for 
> dependencies on CONFIG_*).
> 
> If that slows you down too much, then install ccache (I'm not explaining it 
> here because there is nothing special on ccache with kernel compilation and 
> because there is plenty of tutorials onto the net).
> 
> Bye
As a quick solution to guarantee a correct result of the build, would it be
possible to remove all USER_OBJS, when starting to build? Or, if this isn't
enough, even remove all objects in the arch/um subtree?


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