[Rcpp-devel] Rcpp, Windows and CMake

[Jamie Olson]

I'm trying to build the Avro-C
library[http://avro.apache.org/docs/1.7.5/api/c/index.html].  There is
a README for building in
windows[http://svn.apache.org/repos/asf/avro/trunk/lang/c/README.maintaining_win32.txt]
but it only has instructions for Visual Studio.  I've recently been
wondering if that was intentional, since now cmake-generated MSYS
Makefiles are giving errors.

Are you suggesting that I build the library with MinGW(in
cygwin/linux?) and then just copy it to link to when building the
package with Rcpp?
Jamie Olson


On Wed, Jan 29, 2014 at 2:07 PM, Thell Fowler <tbfowler4 at gmail.com> wrote:
>
>
>
> On Wed, Jan 29, 2014 at 9:39 AM, Jamie Olson <jamie.f.olson at gmail.com>
> wrote:
>>
>> Hi all,
>> I'm a relative beginner in c/c++ and I'm trying to use c/c++ libraries
>> in an R package.  I need it to work in Windows, though, and I'm
>> struggling to get things working.
>>
>> --- >8---
>
>
> It might help to state what c/c++ libraries you're trying to get up and
> running.   There is some documentation in RTools (IIRC) on setting up an
> RTOOLS_LOCAL encironment that was pretty straight forward.  I had success
> building the libraries for GMP, MPFR, and such using mingw-64 then placing
> the resulting files in an RToolsLocal directory.  If you go that route you
> should be able to use cmake to build and then install into your LOCAL path.
>
> Or, are you trying to have this cmake be part of a package that you are
> creating?
>
>
>> The native CMake refuses to use the Rtools gcc with MinGW Makefiles
>>
>
> This doesn't surprise me at all, as the RTools toolchain requires that the
> environment is setup, which it is when calling _from_ R.  You'd have to
> figure out how to do that manually if you want to use that g++ from else
> where (say msys).  It can be done, but as you mention...
>
>> --->8---
>>
>>
>> The
>> documentation[http://cran.r-project.org/doc/manuals/R-admin.html#The-MinGW_002dw64-toolchain]
>> states:
>> Users developing packages with Rcpp need to ensure that they use a
>> version built with exactly the same toolchain as their package: the
>> recommendation is to build Rcpp from its sources yourself.
>>
>> Do I simply need to install Rcpp from source using my target compiler?
>>  Will that effect my ability to use the binary package on other
>> systems(with CRAN Rcpp)?
>>
>
> You _can_ install Rcpp from source on windows using a recent msys
> environment with a recent g++ ( I did last December ).  But there be dragons
> down that road!  You have to make sure that you get all of the settings
> correct and all of that jazz, which is a major pain; and then you are still
> going to have problems unless you can figure out the proper procedure for
> getting the unwinding info correct, and the cross boundary communication
> between libraries correct or you will end up freezing R with every error
> your code produces.  I would've kept with a g++ 4.8.2 or clang 3.4 if it
> wasn't for the fact that I couldn't get any graceful exception handling.
>
> I know I make it sound bad.  That is on purpose!  You said you are a
> relative beginner...  I'm someone who likes to 'just dive in'; and I can
> tell you that I dove in right where you are standing and you're gonna your
> head if you do it that way.
>
>
>> --->8---
>>
>>
>> Thanks for any help you can offer,
>> --Jamie
>>
>>
>> Jamie Olson
>>
>> _______________________________________________
>> Rcpp-devel mailing list
>> Rcpp-devel at lists.r-forge.r-project.org
>> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
>
>
>
>
> --
> Sincerely,
> Thell