RTools packages compilation options

Question

I have a package to install which hardly using computations (block written on fortran and c). So, I want to enable max optimization like mtune=native and other. 2 questions.

1) Where could I find and change base compilation options for g++/gcc?

2) What are best options for maximum code optimization for Corei7-6700K?

Thank you.

Answer 1

Read the documents on Using `Makevars' .

• Example

Create the file Makevars or Makevars.win in the folder src, and add your option, such as PKG_CPPFLAGS = -O2 -mtune=native -pipe .