How to bypass WGCNA installation error?

Question

[fernardo]

I am trying to install WGCNA with R 3.6, MAC, Rstudio, and I get the following output:

installation of package ‘WGCNA’ had non-zero exit status

The first error starts by this:

corFunctions-utils.c:891:10: warning: unused variable 'vx' [-Wunused-variable]
  double vx, vy;

Already applied suggestion:

• A: Error in WGCNA packages installation in R?
• WGCNA not working with R 3.6.2

More:

• xcode-select --install # says already installed

• Mac: Catalina

Thanks for any suggestion

[h.mon]

corFunctions-utils.c:891:10: warning: unused variable 'vx' [-Wunused-variable]
  double vx, vy;

This is a warning, not an error. The error should be something else.

[fernardo]

Update (Solution):

I wouldn't say this would be a solution (As it still happens in R3.6), but I could manage it by installing lastest version of R 4.0 and WGCNA could be installed easily.