recognize but ignore -undef flag

1990-02-12 14:33:57 +00:00
parent 7761eecc34
commit abeebac3c1
2 changed files with 9 additions and 0 deletions
--- a/util/cpp/cpp.6
+++ b/util/cpp/cpp.6
@@ -58,6 +58,9 @@ when generating makefile dependencies, generate them in the following format:
 .IP ""
 where "file.o" is derived from the source file name. Normally, only a list
 of files included is generated.
+.IP -\fBundef\fR
+.br
+this flag is silently ignored, for compatibility with other preprocessors.
 .PP
 The following names are always available unless undefined:
 .IP __FILE__