+MAKE COMPATIBILITY
+------------------
+
+Note that Makefile.in has a rule that uses a wildcard in a prerequisite. If
+your make has a problem with this rule, you will see an error like this:
+
+ Don't know how to make ./*.c
+
+You can change the "proto.h-tstamp" target in Makefile.in to list all the *.c
+filenames explicitly in order to avoid this issue.
+