I have a question about how one can modify or override the compilers
that R uses for package installations? Or if perhaps this configuration
is in some editable file somewhere.
Initially I built the version of R 2.15.1 on Solaris SPARC (virtual T4),
but found out the build was done as 32 bit. After some research, I
found that the pre-compiled GCC version I had only allowed for 32 bit.
I wanted 64 bit. Therefore I ended up download the SunStudio compilers
(12.1 version) and was able to export the compiler commands (per the R
manual) and get a 64 bit version running. The problem I have now is
that I am trying to install the GBM package from CRAN (and from source
as well.) What I find is that something keeps trying to run "c++"
during compilation. Since I only have the SUN compiler the file is
named "CC" not "c++". How do I override this?
I've tried the following with no success:
1. EXPORT CXX to point to my CC compiler (eg export
CXX='/opt/SUNWspro/bin/CC')
2. Create an alias to c++ (eg alias c++='/opt/SUNWspro/bin/CC')
3. I even tried to create a symlink for g++: ln -s /opt/SUNWspro/bin/CC
c++
However none of these seem to work and I get the following error:
># /usr/local/bin/R CMD INSTALL /export/home/downloads>
* installing to library '/usr/local/lib/R/library'
* installing *source* package 'gbm' ...
** package 'gbm' successfully unpacked and MD5 sums checked
** libs
c++ -m64 -I/usr/local/lib/R/include -DNDEBUG -I/usr/local/include
-KPIC -c adaboost.cpp -o adaboost.o
bash: c++: command not found
*** Error code 127
make: Fatal error: Command failed for target `adaboost.o'
ERROR: compilation failed for package 'gbm'
* removing '/usr/local/lib/R/library/gbm'
Is there some environment variable or config file I can temporarily
override this setting? My first thought was that I can try to build GCC
from source, but I've spent two days trying to get that to work no
success. In addition, trying to download the version from sun-freeware
did not appear to work as well. Therefore that's why I am looking at
this direction to see if there is a way I can get this package
installed? I will note that if I manually compile the GBM source using
"CC" it compiles fine. I just think something in R is overriding this.
I tried installing from both the CRAN download as well as GBM source and
get the same error. I don't see any configuration in the GBM tar ball
so I assume that there is some standard packaging or configuration that
R has when developing packages (have not fully read through those docs
yet.)
Any thoughts or pointers?
Thanks in advance.
Anthony
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