xcode-select --install

I ve downloaded xcode version 12.0.1
my OSX is catalina
When I invoked "xcode-select -- install" (terminal) I got this error:

"xcode-select: note: install requested for command line developer tools"

A prompt message appears to invite me to download it but the command line software or app is no longer on apple developper website (at the end)

I have to use gfortran (gcc) which requires some libraries created by xcode but which are not ; so bug for xcode.
Any help would be very much appreciated
Thank you in advance
Richard R.
xcode-select --install
 
 
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