The GNU compiler system’s driver program, gcc (which you used in the preceding programming
example), is typically located in /usr/bin or /usr/local/bin, but it will run various compiler-
support applications from another location. This location is specified when you compile the compiler
itself and varies with the host computer type. For Linux systems, this location might be a version-
specific subdirectory of /usr/lib/gcc/. On one of the author’s machines at the time of writing it is
/usr/lib/gcc/i586-suse-linux/4.1.3. The separate passes of the GNU C/C++ compiler, and
GNU-specific header files, are stored here.


I can not understand " but it will run various compiler-
support applications from another location. "

what does it mean ? thanks