+2003-04-19 Nathan Sidwell <nathan@codesourcery.com>
+
+ * doc/invoke.texi (-fprofile-arcs): Mention -lgcov, locking and
+ fork behaviour.
+
2003-04-19 Neil Booth <neil@daikokuya.co.uk>
* cppexp.c (eval_token): Permit true and false even if pedantic.
every source file in a program.
@item
-Link your object files as normal.
+Link your object files with @option{-lgcov} or @option{-fprofile-arcs}
+(the latter implies the former).
@item
Run the program on a representative workload to generate the arc profile
-information. This may be repeated any number of times.
+information. This may be repeated any number of times. You can run
+concurrent instances of your program, and provided that the file system
+supports locking, the data files will be correctly updated. Also
+@code{fork} calls are detected and correctly handled (double counting
+will not happen).
@item
For profile-directed optimizations, compile the source files again with