Parse and ignore .IX (generate index entry) macros because pod2man(1)

emits them, by default without defining them, relying on the roff(7)
quirk that undefined macros have no effect.
This cures 1996 mandoc ERRORs in src/gnu.

diff --git a/usr.bin/mandoc/roff.c b/usr.bin/mandoc/roff.c
index bb9db49..16e03ad 100644 (file)
--- a/usr.bin/mandoc/roff.c
+++ b/usr.bin/mandoc/roff.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: roff.c,v 1.121 2015/01/14 22:57:57 schwarze Exp $ */
+/*     $OpenBSD: roff.c,v 1.122 2015/01/16 16:52:39 schwarze Exp $ */
 /*
  * Copyright (c) 2010, 2011, 2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2015 Ingo Schwarze <schwarze@openbsd.org>
@@ -73,6 +73,7 @@ enum  rofft {
        ROFF_T_,
        ROFF_EQ,
        ROFF_EN,
+       ROFF_IX,
        ROFF_cblock,
        ROFF_USERDEF,
        ROFF_MAX
@@ -272,6 +273,7 @@ static      struct roffmac   roffs[ROFF_MAX] = {
        { "T&", roff_T_, NULL, NULL, 0, NULL },
        { "EQ", roff_EQ, NULL, NULL, 0, NULL },
        { "EN", roff_EN, NULL, NULL, 0, NULL },
+       { "IX", roff_line_ignore, NULL, NULL, 0, NULL },
        { ".", roff_cblock, NULL, NULL, 0, NULL },
        { NULL, roff_userdef, NULL, NULL, 0, NULL },
 };