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Author: Chris Chimelis <chris@debian.org>
Description: Add more documentation about profiling and -fprofile-arcs.
--- a/gprof/gprof.texi
+++ b/gprof/gprof.texi
@@ -149,6 +149,10 @@
If more than one profile file is specified, the @code{gprof}
output shows the sum of the profile information in the given profile files.
+If you use gcc 2.95.x or 3.0 to compile your binaries, you may need
+to add the @samp{-fprofile-arcs} to the compile command line in order
+for the call graphs to be properly stored in gmon.out.
+
@code{Gprof} calculates the amount of time spent in each routine.
Next, these times are propagated along the edges of the call graph.
Cycles are discovered, and calls into a cycle are made to share the time
@@ -280,6 +284,11 @@
options. The same option, @samp{-pg}, alters either compilation or linking
to do what is necessary for profiling. Here are examples:
+If you use gcc 2.95.x or 3.0.x, you may need to add the
+@samp{-fprofile-arcs} option to the compile line along with @samp{-pg}
+in order to allow the call-graphs to be properly included in the gmon.out
+file.
+
@example
cc -g -c myprog.c utils.c -pg
cc -o myprog myprog.o utils.o -pg
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