Accidentally overwrote /usr/local/include, what's the damage? I ran this command accidentally when I was trying to give Homebrew access to write some symlinks:

sudo install -d -o $(whoami) -g admin /usr/local/include


and I realized by the -d flag would create a new include directory.

Now the /usr/local/include directory is empty and I can't seem to find any obvious damage done to my system. 

Could someone please tell me what usually is in /usr/local/include and what I should do to rebuild its content?
In base MacOS /usr/local is empty so /usr/local/include just contains what you  have installed.

So either


The best way restore from a backup
Delete /usr/local/* and reinstall Homebrew and any other files you have installed there.