Re: [Qemu-devel] Compile error on FC17

[Gerhard Wiesinger <lists@wiesinger.com>]

On 10.03.2013 18:04, Peter Maydell wrote:
> Oh, right. Tracing functions moved from trace.h to the files in the 
> trace/ subdirectory. This means that if you didn't do a make clean or 
> distclean before doing the git update then the new makefile knows 
> nothing about the old trace.h file and so won't delete it, but the 
> compiler may still pull it in anyhow. However this happened a long 
> time back which is why I didn't mention it as a possibility (it was 
> discussed on the list at the time as a number of people including me 
> ran into it). If you remove all the files: trace.c trace.h 
> trace.c-timestamp trace.h-timestamp this should resolve the problem. 
> This is an example of a longstanding problem we have, where the 
> makefile's dependency rules aren't able to cope with changes to the 
> project source file structure, and so clean, distclean and incremental 
> build sometimes breaks across a git update. I think this is pretty 
> intractable as a problem to solve; you can mitigate it by doing all 
> your builds in a build directory rather than in the source tree 
> itself, since then you can always just delete the whole build tree to 
> get a definite from-scratch build.

rm -f trace.c trace.h libcacard/trace.c
find . -name \*-timestamp -exec rm -f {} \;
make distclean
make clean
./configure --target-list=x86_64-softmmu

# No files found
find . -name \*-timestamp

# No files found
find . -name trace.c

# Under git version control:
# ./include/trace.h
find . -name trace.h

=> Worked well

But shouldn't "make distclean" do the job correctly (even with a changed 
directory structure, at least for some time)?

Ciao,
Gerhard