Installation of G++

I also followed this Installation Guide

However, I see I have more errors and warnings:
Could not locate executable g77
Could not locate executable f77
Could not locate executable ifort
Could not locate executable ifl
Could not locate executable f90
Could not locate executable DF
Could not locate executable efl

Thread model: posix
gcc version 5.3.0 (Rev5, Built by MSYS2 project)
WARNING (aesara.tensor.blas): Using NumPy C-API based implementation for BLAS functions.
Problem occurred during compilation with the command line below:
“C:\Users\m_esk\anaconda3\envs\pm3env\Library\mingw-w64\bin\g++.exe”

I think I am mixing up everything @sree_datta.