-its contents are overwritten. There is currently no way to tell the
-program to write the profile data under a different name, but you can rename
-the file afterwards if you are concerned that it may be overwritten.
+its contents are overwritten. You can rename the file afterwards if you
+are concerned that it may be overwritten. If your system libc allows you
+may be able to write the profile data under a different name. Set the
+GMON_OUT_PREFIX environment variable; this name will be appended with
+the PID of the running program.