Re: [Rd] Updated Windows toolchain from Uwe Ligges on 2012-01-19 (R devel archive)

Re: [Rd] Updated Windows toolchain

From: Uwe Ligges <ligges_at_statistik.tu-dortmund.de>
Date: Thu, 19 Jan 2012 10:57:21 +0100

For the records: This rsync infelicity has been solved in the meantime.

Uwe Ligges

On 19.01.2012 02:03, Dan Tenenbaum wrote:
> 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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>
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