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

[A Former User]

There is nothing as "installing it via Qt". If you have installed it in R Studio then you just need to locate the R library and the header files I mentioned above. Then adjust the paths in your *.pro file.

[newe12]

Thanks! I understand.

Well in R Studio I identified the R library with ".Library"and I got:

.Library
[1] "/Library/Frameworks/R.framework/Resources/library"

In combination with your suggestion I tried this:
INCLUDEPATH += /Users/xy/share/R/include
INCLUDEPATH += /Users/xy/Library/Frameworks/R.framework/Resources/library/Rcpp/include
LIBS += -L/Users/xy/lib -lR
but it was not working...

[A Former User]

Sorry, but I can't help you with Mac OS. :-(

[newe12]

Okay! Thank you very much for your help!

[A Former User]

You're welcome!

[SGaist]

Hi and welcome to devnet,

Try with -framework R in place of -lR

[newe12]

Thanks!

Well, now I have got:
INCLUDEPATH += /Users/xy/share/R/include
INCLUDEPATH += /Users/xy/Library/Frameworks/R.framework/Resources/library/Rcpp/include
LIBS += -L/Users/xy/Library -framework R

but I still get:
'Rcpp.h' file not found

also if change to:
LIBS += -L/Users/xy/Library/Frameworks/R.framework/

and when I typed in R Studio:
getw()

I got:
/Users/xy

Sorry, but I do not find the mistake. Any idea?

[SGaist]

It depends on how you wrote your includes

What mistake are you thinking about ?

[newe12]

I wrote my include: #include "Rcpp.h" in mainwindow.cpp.
It is not conflicting with: #include "math.h", or?

And it displays: directory not found for: LIBS += -L/Users/xy/Library/Frameworks/R.framework/ and also for: LIBS += -L/Users/xy/Library -framework R

[SGaist]

To add a path for frameworks you should user -F /Users/xy/Library/Frameworks/
The includes are generally in fwname.framework/Headers

[newe12]

Hi!

Sorry, but Qt still does not find the "Rccp.h" file. I tried to include #include "Rcpp.h" in mainwindow.cpp or in mainwindow.h. Or should I include it in main.cpp?

and additionally I wrote in the .pro-file:
HEADERS += mainwindow.h

FORMS += mainwindow.ui

INCLUDEPATH += /Users/xy/share/R/include
INCLUDEPATH += /Users/xy/Library/Frameworks/R.framework/Resources/library/Rcpp/include
LIBS += -L/Users/xy/Library/Frameworks/R.framework/
INCLUDEPATH += -F/Users/xy/Library/Frameworks/R.framework/Resources/library/Rcpp/include

and I tried: INCLUDEPATH += "/Users/.../include" using: "..." but same result.

In RStudio it gives me:

.Library
[1] "/Library/Frameworks/R.framework/Resources/library"
getwd()
[1] "/Users/xy"

So I combined: "/Users/xy/Library/Frameworks/R.framework/Resources/library"

Unfortunately, always the same result 'Rcpp.h' not found.

Even they: https://stat.ethz.ch/pipermail/r-sig-mac/2011-May/008270.html found
"/Library/Frameworks/R.framework/Resources/library" should be alright!

Has got anyone an idea?

I just want to use 'Rcpp.h' (which I already installed via RStudio, where it loads and runs without any problems) in Qt with a Mac. :-)

[newe12]

Has anyone an idea to get Rcpp.h http://dirk.eddelbuettel.com/code/rcpp/html/Rmath_8h.html
running in Qt with a Mac?

[A Former User]

Hi again!
Can you open the directory "/Users/xy/Library/Frameworks/R.framework/Resources/library/Rcpp/include" with a file manager? Does it contain the file "Rcpp.h" ?

[newe12]

Hi,
I tried to re-install Rcpp.h:

• installing source package ‘Rcpp’ ...
  ** Paket ‘Rcpp’ erfolgreich entpackt und MD5 Summen überprüft
  ** libs
  clang++ -I/Library/Frameworks/R.framework/Resources/include -DNDEBUG -I../inst/include/ -I/usr/local/include -I/usr/local/include/freetype2 -I/opt/X11/include
  ...
  ...
  clang++ -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -single_module -multiply_defined suppress -L/Library/Frameworks/R.framework/Resources/lib -L/usr/local/lib -o Rcpp.so Date.o Module.o Rcpp_init.o api.o attributes.o barrier.o -F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation
  installing to /Library/Frameworks/R.framework/Versions/3.1/Resources/library/Rcpp/libs
  ** R
  ** inst
  ** preparing package for lazy loading
  ** help
  *** installing help indices
  ** building package indices
  ** installing vignettes
  ** testing if installed package can be loaded
• DONE (Rcpp)

---

then I used:
INCLUDEPATH += /Users/xy/Library/Frameworks/R.framework/Versions/3.1/Resources/library/Rcpp/include
LIBS += -I/Library/Frameworks/R.framework/Resources/include
or
LIBS += -F/Library/Frameworks/R.framework/Resources/include

It still does not run!

[A Former User]

Hallo :-)

-o Rcpp.so Date.o Module.o Rcpp_init.o api.o attributes.o

I see that some object code files have been installed. But are you really sure that the file "Rcpp.h" exists in "/Users/xy/Library/Frameworks/R.framework/Versions/3.1/Resources/library/Rcpp/include" ? Maybe the Rcpp project has been split in two separate packages: One package only for software that uses Rcpp binaries and a second package for developers that includes all the header files (so called "-dev" package)?

[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... :-)