[R-pkg-devel] OpenMP on MacOS

[Konrad Krämer]

Dear all,
I have a problem regarding OpenMP on Mac OS. Recently I submitted my package to CRAN (https://cran.r-project.org/web/packages/paropt/index.html). However, there seems to be a problem with 'fopenmp' on Mac OS using clang++. I have read many forums regarding the topic. Thus, I know that there is no support for OpenMp on Mac OS (at least using the default clang compiler). 
The error was: clang: error: unsupported option '-fopenmp'
Is it possible to detect the operating system and set according to this the compile flags and use also a sequentiell version of the code?
Or is there a better way to cope with this problem?
Many thanks in advance for your help.
Regards,
Konrad 
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