[Rd] Updated Windows toolchain

[Dan Tenenbaum]

Hi Uwe,

2012/1/18 Uwe Ligges <ligges at statistik.tu-dortmund.de>:
>
>
> On 18.01.2012 01:09, Dan Tenenbaum wrote:
>>
>> Hello,
>>
>> On Mon, Jan 9, 2012 at 12:28 AM, Prof Brian Ripley
>> <ripley at stats.ox.ac.uk>  wrote:
>>>
>>> CRAN Windows binary packages built for R-devel are now online, and Uwe's
>>> winbuilder has gained the ability to check source packages under R-devel.
>>>
>>> Windows check results are available from
>>> http://cran.r-project.org/bin/windows/contrib/checkSummaryWin.html
>>> and in due course from the main CRAN check page.
>>>
>>> There have been a few updates to the toolchain:
>>>
>>> (i) It is now based on a beta of gcc 4.6.3, and so reports almost the
>>> same
>>> compilation warnings/errors as the CRAN check machines.
>>>
>>
>> Is the binary R-devel provided by CRAN built against this toolchain?
>> If it is, should I expect "R --arch x64 CMD config CC" to report
>> "gcc"? It still reports "x86_64-w64-mingw32-gcc" (R-devel 58077).
>
>
> Actually "gcc -m64" and that is also the case when I just tried yesterday's
> CRAN version (which is 58125). I guess you have an older version of R in
> your PATH?
>


I can't seem to download the latest R-devel. When I try and download this file:
http://cran.r-project.org/bin/windows/base/R-devel-win.exe

and install that, it turns out to be r58077. I've tried with two
different browsers and with curl, and with another CRAN mirror. I
tried this on a fresh machine with no previous R installations or
installer .exes lying around.

The web page
http://cran.r-project.org/bin/windows/base/rdevel.html
says I should be downloading r58133 but that doesn't seem to be the
case....can you look into this?


>
>
>
>> Also, I have the latest Rtools installed (VERSION.txt reads "Rtools
>> version 2.15.0.1911") and it is first on my PATH.
>>
>> I expect "gcc --version" to report 4.6.3 but it still says 4.5.0.
>>
>> "x86_64-w64-mingw32-gcc --version" reports 4.5.2.
>> "which gcc" reports "/cygdrive/c/Rtools215/MinGW/bin/gcc".
>>
>> "which x86_64-w64-mingw32-gcc" reports
>> "/cygdrive/c/Rtools215/MinGW64/bin/x86_64-w64-mingw32-gcc".
>
>
>
> Yes, these are the version you need for old versions of R that are included
> in the Rtools, but it has a third gcc in subdir gcc-4.6.3 which is the one
> you should have first in the path in order to use the new toolchain.


Good, I did not know about this directory. I will put it first in my
PATH after I am able to get a recent R-devel binary.
Thanks,
Dan




>
> Uwe Ligges
>
>
>
>
>
>>> (ii) There are various bug-fixes to the toolchain: notably x^n and exp(x)
>>> use gradual underflow to denormal numbers rather than abrubtly
>>> underflowing
>>> to zero.
>>>
>>> (iii) This is a 'multilib' toolchain: the compiler is named 'gcc.exe' for
>>> both architectures, selected by flag -m32 (the default) and -m64.
>>
>>
>> Looks like to check gcc versions I should (instead of what I do above)
>> do simply "gcc --version". I imagine that "gcc -m32 --version" would
>> report the same thing as "gcc -m64 --version".
>>
>> Thanks,
>> Dan
>>
>>
>>>
>>>
>>> On 29/11/2011 07:56, Prof Brian Ripley wrote:
>>>>
>>>>
>>>> An updated toolchain is now being used for Windows' builds of R-devel:
>>>> details are in the R-admin manual and at
>>>> http://www.murdoch-sutherland.com/Rtools/ and
>>>> http://www.stats.ox.ac.uk/pub/Rtools/
>>>>
>>>> Both 32- and 64-bit parts of the toolchain use v2.0.1 of the Mingw-w64
>>>> project's runtime and a beta of gcc 4.5.4: the Mingw.org project's
>>>> builds are no longer used. This should mean that code which compiles for
>>>> 64-bit Windows also compiles for 32-bit Windows, and v.v. unless code
>>>> makes (incorrect but common) assumptions that pointers fit into longs.
>>>>
>>>> A very few packages will need modifications because they contain
>>>> declarations which clash with the headers in this toolchain: where we
>>>> are aware of problems the maintainers have been informed.
>>>>
>>>> At DLL level different Windows' toolchains should be compatible: at C
>>>> level they mostly are but at C++ level they are pretty much incompatible
>>>> (so that for example GDAL has to be re-compiled for every toolchain: and
>>>> Rcpp users need to be careful to use only one toolchain for Rcpp and
>>>> their packages). All the external software previously made available
>>>> (and more) is made available at http://www.stats.ox.ac.uk/pub/Rtools .
>>>>
>>>> The toolchain has support for OpenMP and pthreads: however OpenMP
>>>> support is not enabled by default in R (it is too slow to be much use).
>>>> If you do make use of it in your packages, be aware that you will need
>>>> to ship the appropriate pthreads DLL(s).
>>>>
>>>> It is expected that there will be several further minor updates prior to
>>>> the release of 2.15.0 in ca 4 months, but this step is the major one.
>>>>
>>>
>>>
>>> --
>>> Brian D. Ripley,                  ripley at stats.ox.ac.uk
>>> Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
>>> University of Oxford,             Tel:  +44 1865 272861 (self)
>>> 1 South Parks Road,                     +44 1865 272866 (PA)
>>> Oxford OX1 3TG, UK                Fax:  +44 1865 272595
>>>
>>> ______________________________________________
>>> R-devel at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>
>>
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