Installation failing on R 3.6.3 and Mac OS Catalina ?

[egarpor]

After installing R 3.6.3 and r-macos-rtools, then successfully installing devtools::install_github("lbartnik/subprocess") (since such package is no longer on CRAN and is a dependency), I got the following error when trying to install prodyna:

> devtools::install_github("lettis/prodyna")
Downloading GitHub repo lettis/prodyna@master
✓  checking for file ‘/private/var/folders/mb/8h7xjbpj6dj81r10lzk8gxxm0000gn/T/RtmpQsmSv0/remotes4d2f458ae093/lettis-prodyna-e7411aa/DESCRIPTION’ ...
─  preparing ‘prodyna’:
✓  checking DESCRIPTION meta-information ...
─  cleaning src
─  checking for LF line-endings in source and make files and shell scripts
─  checking for empty or unneeded directories
─  building ‘prodyna_0.1.0.tar.gz’
   
* installing *source* package ‘prodyna’ ...
** using staged installation
** libs
clang++ -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -fopenmp -I"/Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include" -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -I/usr/local/include -fopenmp `Rscript -e 'Rcpp:::CxxFlags()'` -fPIC  -Wall -g -O2  -c RcppExports.cpp -o RcppExports.o
clang++ -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -fopenmp -I"/Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include" -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -I/usr/local/include -fopenmp `Rscript -e 'Rcpp:::CxxFlags()'` -fPIC  -Wall -g -O2  -c circacf.cpp -o circacf.o
clang++ -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -fopenmp -I"/Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include" -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -I/usr/local/include -fopenmp `Rscript -e 'Rcpp:::CxxFlags()'` -fPIC  -Wall -g -O2  -c fastacf.cpp -o fastacf.o
clang++ -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -fopenmp -I"/Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include" -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -I/usr/local/include -fopenmp `Rscript -e 'Rcpp:::CxxFlags()'` -fPIC  -Wall -g -O2  -c rama2rgb.cpp -o rama2rgb.o
rama2rgb.cpp:34:21: error: constexpr variable 'scale' must be initialized by a constant expression
    constexpr float scale = std::sqrt(2) * 180.0;
                    ^       ~~~~~~~~~~~~~~~~~~~~
rama2rgb.cpp:34:29: note: non-constexpr function 'sqrt<int>' cannot be used in a constant expression
    constexpr float scale = std::sqrt(2) * 180.0;
                            ^
/usr/local/clang7/include/c++/v1/math.h:1038:1: note: declared here
sqrt(_A1 __lcpp_x) _NOEXCEPT {return ::sqrt((double)__lcpp_x);}
^
1 error generated.
make: *** [rama2rgb.o] Error 1
ERROR: compilation failed for package ‘prodyna’
* removing ‘/Library/Frameworks/R.framework/Versions/3.6/Resources/library/prodyna’
Error: Failed to install 'prodyna' from GitHub:
  (converted from warning) installation of package ‘/var/folders/mb/8h7xjbpj6dj81r10lzk8gxxm0000gn/T//RtmpQsmSv0/file4d2f209df690/prodyna_0.1.0.tar.gz’ had non-zero exit status

The version details:

> version
               _                           
platform       x86_64-apple-darwin15.6.0   
arch           x86_64                      
os             darwin15.6.0                
system         x86_64, darwin15.6.0        
status                                     
major          3                           
minor          6.3                         
year           2020                        
month          02                          
day            29                          
svn rev        77875                       
language       R                           
version.string R version 3.6.3 (2020-02-29)
nickname       Holding the Windsock