.I SConstruct
file,
.B scons
-adds looks for a dir named
+looks for a directory named
.I site_scons
-in the dir containing the
+in the directory containing the
.I SConstruct
-file; it adds that
+file; if it exists,
.I site_scons
-to sys.path, reads the file
+is added to sys.path,
+the file
.IR site_scons/site_init.py ,
-and adds the directory
+is evaluated if it exists,
+and the directory
.I site_scons/site_tools
-to the default toolpath, if those exist. See the
+is added to the default toolpath if it exist.
+See the
.I --no-site-dir
and
.I --site-dir
This example adds 'include' to
.BR CPPPATH ,
-\'EBUG' to
+\&'EBUG' to
.BR CPPDEFINES ,
and 'm' to
.BR LIBS .