On Wednesday 31 May 2006 21:12, Simon Baxter wrote:
> I'm not sure if anyone's following my problems with getting a new PVR-150
> card and ivtv working with Fedora Core 5.
I am sure following since I have nearly the same problem on my SuSE 10.1
system (see my posting "ivtv-0.6.x / gcc-4.1 / SUSE 10.1 problems" of
2006-05-24) for which there also have been no helpful replies.
The only thing I know is that the problem is depended on the
compiler/linker toolchain. I can only think of two reasons at
the moment:
1) a code generation bug in gcc-4.1.
2) better code optimization in gcc-4.1 breaks some assumptions of
the i2c code. The compiler has really no idea about the dependencies
needed for accessing hardware (e.g a specific store that has to
occur before a load) and may reorder C level statements at will as
long as the C semantics are preserved.
Given that everything else compiled by the gcc 4.1 looks to be fine
and how often I wrongly tried to blame a compiler for some bugs I
tend to favor 2).
Thomas
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