[Rcpp-devel] Help compiling qtdensity example on windows [SOLVED]
thlytras at gmail.com
Wed Nov 28 00:43:11 CET 2012
Στις Δευ 26 Νοε 2012, ο/η Dirk Eddelbuettel έγραψε:
> Hang in there. It would be nice to get this going, and document it. It is,
> as so many things, frightfully tedious in Windows but I think it can be
Finally nailed it!!! Compiled and run qtdensity example on windows. :D
> It may of course also work with the Qt binary you got. Sometimes it is
> just link order etc pp. But hard to tell.
That's exactly what the problem was: the linker was linking against libRcpp.a
before linking libRInside.a.
So I had to modify the qtdensity.pro file, and move $$RINSIDELIBS just before
$$RCPPLIBS on line 46 (QMAKE_LIBS). That did the trick.
In addition, I had to replace single quotes on lines 31,32,41 and 42 with
double quotes, otherwise Rscript would not properly evaluate
I used the latest Qt SDK (1.2.1), which includes the Qt 4.8.1 binaries, Qt
Creator and MinGW 4.4.0. Didn't need to compile Qt from source. R was binary
I did need however to install Rcpp and RInside from source, and with the same
compiler used to compile qtdensity (otherwise I would get additional linker
errors). As I had trouble getting the (Cygwin-based) g++ shipped with Rtools
to work with Qt, I used instead the g++ shipped with Qt SDK to compile Rcpp
and RInside. To do that, I adjusted the PATH environment variable to point to
QtSDK\mingw\bin instead of Rtools\gcc-4.6.3\bin.
That's the whole story of how it worked for me. I suggest that qtdensity.pro
receive these two modifications for the next RInside release (patch included);
I tried this on Linux too and it seems to do no harm there.
I do wonder why linking order seems to matter on windows and not on linux, but
I'm no expert....
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