[Rd] R CMD check warning about compiler warning flags

Duncan Murdoch murdoch.duncan at gmail.com
Thu Dec 21 13:01:38 CET 2017

On 20/12/2017 6:52 PM, Duncan Murdoch wrote:
> On 20/12/2017 5:48 PM, Hadley Wickham wrote:
>> On Wed, Dec 20, 2017 at 4:26 PM, Prof Brian Ripley
>> <ripley at stats.ox.ac.uk> wrote:
>>> On 20/12/2017 17:42, Winston Chang wrote:
>>>> On recent builds of R-devel, R CMD check gives a WARNING when some
>>>> compiler warning flags are detected, such as -Werror, because they are
>>>> non-portable. This appears to have been added in this commit:
>>>>      https://github.com/wch/r-source/commit/2e80059
>>> That is not the canonical R sources.  And your description seems wrong:
>>> there is now an _optional_ check controlled by an environment variable,
>>> primarily for CRAN checks.
>> Are the canonical R sources made available in such a way that one can
>> link to them?
> Yes, the sources are available.  To link to revision 73909 of R on the
> trunk branch (which I think is the one referred to above), use
> https://svn.r-project.org/R/trunk/?r=73909
> I'm not sure if there's an easy way to see the diff between that and
> 73908 (which is what the github link showed).  

After checking a bit online, it appears there are projects WebSVN, USVN 
and ViewVC that should do this. I don't know if anyone has set up views 
of the R repository with any of those.  I've never used them, I just use 
local tools.  In the past I used Windows-only TortoiseSVN (and it is 
still one of the most attractive features of Windows); now I use RStudio 
or command line svn.  As you know, RStudio's interface is somewhat 
limited, and as far as I know it can't display features of remote 

I also don't know if
> there's a way to show the diff between commit N and N-1 in github if I
> only know N.

I still don't know this.

Duncan Murdoch

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