How to use Rcpp in Qt (with Mac) [Almost Solved]?

[newe12]

Hi Wieland!

Thanks! Yes it exists!

I checked (in the Terminal): cd /Library/Frameworks/R.framework/Resources/library
and then "ls"

And it is there: Rcpp

Then i changed to: cd Rcpp and "ls" gave me:
CITATION NAMESPACE THANKS examples libs
DESCRIPTION NEWS.Rd announce help prompt
INDEX R discovery html skeleton
Meta README doc

This was initially downloaded from: http://cran.r-project.org/web/packages/Rcpp/index.html

And I changed:
INCLUDEPATH += /Users/xy/Library/Frameworks/R.framework/Resources/library/Rcpp/include
LIBS += -I/Users/xy/Library/ -framework R
in the .Pro-file.

Any ideas?

[A Former User]

Sorry for being pedantic on this (I'm only as pedantic as the compiler is ;-) ). You said:

cd /Library/Frameworks/R.framework/Resources/library
And it is there: Rcpp

That is a directory. Where exactly is the file Rcpp.h?

[newe12]

Hi Wieland, thanks for your hint!

Finally, I found Rcpp.h and I managed to include it with the correct path and now Rcpp.h is found!
Here the two steps, which helped me to solve it:

1. QMAKE_LFLAGS += -I /Library/Frameworks/R.framework/Resources/library/Rcpp/ # use qmake and then uncomment it
2. INCLUDEPATH += -I /Library/Frameworks/R.framework/Resources/library/Rcpp/include
   Remark: Very important was to change the path directly to /Library/... and include "-I".

This first part of the problem is solved!

But now, i get the new error message: framework not found R.

I use: LIBS += -framework R
in the .Pro-file (as suggested here: http://doc.qt.io/qt-4.8/qmake-platform-notes.html).
I also tried: LIBS += -framework -lR
it also did not work.

Here is the error message:

ld: framework not found R
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [xy.app/Contents/MacOS/xy] Error 1
19:13:17: Der Prozess "/usr/bin/make" wurde mit dem Rückgabewert 2 beendet.
Fehler beim Erstellen/Deployment des Projekts xy (Kit: Desktop Qt 5.4.1 clang 64bit)
Bei der Ausführung von Schritt "Make"

I hope this second part can also be solved. Then it should work! Any suggestions?

[SGaist]

Hi,

Did you add -F/Library/Frameworks to your pro file ? It's the equivalent to -L for libraries

[newe12]

Yes!

Well, the problem removed, but this came up:
Undefined symbols for architecture x86_64:
"_REprintf", referenced from:
Rcpp::Rstreambuf<false>::xsputn(char const*, long) in mainwindow.o
Rcpp::Rstreambuf<false>::overflow(int) in mainwindow.o
"_R_FlushConsole", referenced from:
Rcpp::Rstreambuf<false>::sync() in mainwindow.o
Rcpp::Rstreambuf<true>::sync() in mainwindow.o
"_Rprintf", referenced from:
Rcpp::Rstreambuf<true>::xsputn(char const*, long) in mainwindow.o
Rcpp::Rstreambuf<true>::overflow(int) in mainwindow.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [xy.app/Contents/MacOS/xy] Error 1
23:51:38: Der Prozess "/usr/bin/make" wurde mit dem Rückgabewert 2 beendet.
Fehler beim Erstellen/Deployment des Projekts xy (Kit: Desktop Qt 5.4.1 clang 64bit)
Bei der Ausführung von Schritt "Make"

Especially: symbol(s) not found for architecture x86_64
does not disappear after several tries.

Here: https://forum.qt.io/topic/35065/solved-qt5-1-qt5-2-xcode-5-0-2-mac-os-10-9-mavericks-can-t-link-to-the-libraries-undefined-symbols-for-architecture-x86_64/11
it was described that Xcode and Mac Os were not linked properly.

Here: http://stackoverflow.com/questions/25940368/qt5-target-conditionals-not-found
QMAKE_MAC_SDK = macosx10.9
was suggested. Either it failed, or: Project ERROR: Could not resolve SDK path for 'macosx10.xy'
was displayed!

Well yet not solved... :-)