[Rcpp-devel] g++ -m32 used on WIN 64

Jerome MARQUET jerome.marquet at lixoft.net
Tue May 20 08:44:12 CEST 2014


> Thank you very much for you answer Dirk.
>
> You are right I should have spent more time on the documentation. I 
> finally found the solution: following command launches only the 64 
> bits compilation:
>
>     install.packages("C:/Users/win7x64/workspace/myPackage.tar", repos
>     = NULL,*INSTALL_opts = c("--no-multiarch")*, type="source")
>
>
> But I still wonder while both 32 and 64 compilations are launched on 
> WIN64 architecture ?
>
> Anyway thank you very much for your answer.
>
> Best regards,
>
> Jérôme
>
> Le 19/05/2014 13:18, Dirk Eddelbuettel a écrit :
>> On 19 May 2014 at 11:15, Jerome MARQUET wrote:
>> | Hello,
>> |
>> | I am working on a WIN64 platform and trying to install from source a package
>> | "myPackage" that links to dll compiled in 64 bits.
>> |
>> | Under R prompt I launch
>> |
>> |     install.packages("/Path/To/myPackage.tar", , repos = NULL, type="source")
>> |
>> |
>> | and I read that it is the 32 versions of g++ that is used
>> |
>> |
>> |     g++ -m32 -shared -s -static-libgcc -o myPackage.dll tmp.def toto01.o
>> |     toto02.o RcppExports.o toto03.o -LC:/Path/To/MyWIN64Libraries -laWIN64Lib
>> |     -Ld:/RCompile/CRANpkg/extralibs64/local/lib/i386 -Ld:/RCompile/CRANpkg/
>> |     extralibs64/local/lib -LC:/PROGRA~1/R/R-31~1.0/bin/i386 -lR
>> |
>> |
>> | There are several things I do not understand in this trace:
>> |
>> |     a) the -m32
>>
>> See below for your use of '--no-multiarch'. By default it is on: 64 and 32
>> bit are used.
>>
>> |     b) why it is 32bits version of R that is used when my path contains the 64
>> |     version (PATH = ...;C:\Program Files\R\R-3.1.0\bin\x64;...)
>>
>> Same reason. And the 'g++' is just a frontend.
>>   
>> | When I compile through DOS and enter
>> |
>> |     R CMD INSTALL --no-multiarch myPackage
>> |
>> | I observe that it is the correct (64 bits) version that is used but I would
>>
>> Because you enforce it.
>>
>> | rather install my package through the usual install.packages command. Is there
>> | a way to do this ?
>>
>> Both commands are equivalent. The install.packages() function calls the same
>> functionality as the command-line version.
>>
>> It seems to me that you want to learn more about options for
>> install.packages(), so its manual page may be the best place.
>>
>> Dirk
>>
>

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