compilation failed for package 'techchart'

[SNAnalyst]

When I try to install techchart, I get the error below. I am on Win64, I have Rtools installed. Can you please help?

Downloading GitHub repo prodipta/techchart@HEAD ── R CMD build ────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── ✔ checking for file 'C:\Users\snanalyst\AppData\Local\Temp\RtmpWO2gTn\remotes6b3838af2e9a\prodipta-techchart-93f9106/DESCRIPTION' (389ms) ─ preparing 'techchart': (733ms) ✔ 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 'techchart_0.1.0.tar.gz'

Installing package into ‘C:/R/4.5/library’ (as ‘lib’ is unspecified) Using model = "gpt-4o".

• installing source package 'techchart' ... ** this is package 'techchart' version '0.1.0' ** using staged installation ** libs using C++ compiler: 'G__~1.EXE (GCC) 14.2.0' g++ -std=gnu++17 -I"C:/R/R-45~1.0/include" -DNDEBUG -I'C:/R/4.5/library/Rcpp/include' -I"C:/rtools45/x86_64-w64-mingw32.static.posix/include" -O2 -Wall -mfpmath=sse -msse2 -mstackrealign -c RcppExports.cpp -o RcppExports.o g++ -std=gnu++17 -I"C:/R/R-45~1.0/include" -DNDEBUG -I'C:/R/4.5/library/Rcpp/include' -I"C:/rtools45/x86_64-w64-mingw32.static.posix/include" -O2 -Wall -mfpmath=sse -msse2 -mstackrealign -c cpttrend.cpp -o cpttrend.o cpttrend.cpp: In function 'double ols_llk(Rcpp::NumericVector, Rcpp::NumericVector, long int)': cpttrend.cpp:142:27: error: 'PI' was not declared in this scope 142 | ret = double(n)/2log(2PI) + double(n)/2*log(variance) + double(n)/2; | ^~ make: *** [C:/R/R-45~1.0/etc/x64/Makeconf:296: cpttrend.o] Error 1 ERROR: compilation failed for package 'techchart'
• removing 'C:/R/4.5/library/techchart' Warning message: In i.p(...) : installation of package ‘C:/Users/snanalyst/AppData/Local/Temp/RtmpWO2gTn/file6b385d147be6/techchart_0.1.0.tar.gz’ had non-zero exit status