I’m having some trouble with gcc, conda and default directories in which to search header files. According to this answer it automatically searches for files in /usr/include.

According to man gcc:

-print-search-dirs
           Print the name of the configured installation directory and a list of program and library directories gcc searches---and don't do anything else.

But if I do gcc -print-search-dirs | grep -i include I get nothing. Why is that?