> On Jan. 27, 2017, 3 p.m., Jason Lowe-Power wrote:
> > Oops. I should have included this in my description of 
> > http://reviews.gem5.org/r/3792/. I think another solution is to include 
> > Python.h in src/python/swig/pyevent.hh. See my change in 
> > http://reviews.gem5.org/r/3792/diff/1/#33.
> > 
> > If my fix does work, I think it's better to just include Python.h there 
> > instead of changing the style.
> 
> Andreas Sandberg wrote:
>     I'd like to avoid including Python.h in any header files for dependency 
> reasons. Another reason for including it before any other header is that it 
> solves this entire class of issues (the flip side is that we wouldn't always 
> spot headers that requires it).
>     
>     We actually used to require the Python header to be first in the files 
> that required it, but it got lost in a a style update a while back.
> 
> Jason Lowe-Power wrote:
>     Could you explain more about why you don't want to include Python.h in 
> pyevent.hh? It seems to me that since this file requires things declared in 
> Python.h (e.g., PyObject) that it should be included here. Otherwise, we have 
> to remember that anytime we include python/swig/pyevent.hh we first must 
> include Python.h.
> 
> Andreas Sandberg wrote:
>     Sorry, you're absolutely right. It should definitely be included in 
> pyevent.hh. Does that solve the rest of the Python issues? If so, do we 
> need/want this change?

I *think* it solves all of the issues. I was able to use 
http://reviews.gem5.org/r/3792/ and http://reviews.gem5.org/r/3779/ to resolve 
all of the build issues on Arch Linux.

I'm not opposed to pushing this to change the style back, if we think that 
makes sense, too. But I think it's somewhat orthogonal to the build errors.


- Jason


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On Jan. 27, 2017, 1:39 p.m., Andreas Sandberg wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://reviews.gem5.org/r/3794/
> -----------------------------------------------------------
> 
> (Updated Jan. 27, 2017, 1:39 p.m.)
> 
> 
> Review request for Default.
> 
> 
> Repository: gem5
> 
> 
> Description
> -------
> 
> Changeset 11803:1dba09aeeefd
> ---------------------------
> style: Force Python.h to be included before main header
> 
> Python's header files set various compiler macros (e.g.,
> _XOPEN_SOURCE) unconditionally. This triggers preprocessor warnings
> that end up being treated as errors. The style guide used to mandate
> that Python headers are included before any other header. This
> requirement was changed to always include a source file's main header
> first, which ended up triggering these errors.
> 
> This change updates the style checker to always include Python.h
> before the main header file.
> 
> Change-Id: Id6a4f7fc64a336a8fd26691a0ca682abeb1d1579
> Signed-off-by: Andreas Sandberg <[email protected]>
> Reviewed-by: Nikos Nikoleris <[email protected]>
> 
> 
> Diffs
> -----
> 
>   src/python/swig/pyevent.cc be62996c95d1 
>   src/sim/init.cc be62996c95d1 
>   src/sim/py_interact.cc be62996c95d1 
>   util/style/sort_includes.py be62996c95d1 
> 
> Diff: http://reviews.gem5.org/r/3794/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Andreas Sandberg
> 
>

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