Looks like they updated the distfile w/o updating the version.

Some changes stolen from yoshiaki@kt.rim.or.jp

audio/libmikmod/Makefile

@@ -3,18 +3,24 @@
 # Date created:        Sun Apr 11 13:06:01 PDT 1999
 # Whom:                Michael Haro <mharo@area51.fremont.ca.us>
 #
-# $Id: Makefile,v 1.1.1.1 1999/05/05 22:16:12 mharo Exp $
+# $Id: Makefile,v 1.2 1999/05/29 04:29:40 steve Exp $
 #
 
 DISTNAME=	libmikmod-3.1.6
 CATEGORIES=	audio
 MASTER_SITES=	http://www.multimania.com/miodrag/mikmod/
 
-MAINTAINER=	mharo@area51.fremont.ca.us
+MAINTAINER=	mharo@FreeBSD.ORG
 
 LIB_DEPENDS=	esd.1:${PORTSDIR}/audio/esound
 
-USE_GMAKE=	yes
 USE_LIBTOOL=	yes
+USE_GMAKE=	yes
+
+pre-build:
+	${RM} -rf ${WRKSRC}/info/mikmod.info-*
+
+post-install:
+	@${SETENV} OBJFORMAT=${PORTOBJFORMAT} ${LDCONFIG} -m ${PREFIX}/lib
 
 .include <bsd.port.mk>

audio/libmikmod/distinfo

@@ -1,2 +1 @@
 MD5 (libmikmod-3.1.6.tar.gz) = 27fd8ff057d3634e70f53143755bb7ac
-MD5 (libmikmod-3.1.6.diff.gz) = 2a45d70b75778b44948c5d0f76802445

audio/libmikmod/files/patch-ab

@@ -0,0 +1,11 @@
+--- docs/Makefile.in.orig	Sat May  8 18:42:08 1999
++++ docs/Makefile.in	Sat May  8 18:42:28 1999
+@@ -75,7 +75,7 @@
+ LIB_LDADD = @LIB_LDADD@
+ LN_S = @LN_S@
+ MAINT = @MAINT@
+-MAKEINFO = @MAKEINFO@
++MAKEINFO = @MAKEINFO@ --no-split
+ NM = @NM@
+ PACKAGE = @PACKAGE@
+ PLAYER_LIB = @PLAYER_LIB@

audio/libmikmod/pkg-comment

@@ -1 +1 @@
-A portable sound library for Unix.
+MikMod Sound Library, version 3.1.6

audio/libmikmod/pkg-descr

@@ -1,4 +1,5 @@
-A portable sound library for Unix used by the mikmod port.
+This is libmikmod, version 3.1.6, a portable sound library for Unix
+which is used by the mikmod port.
 
 WWW: http://www.multimania.com/miodrag/mikmod/
 

audio/libmikmod/pkg-plist

@@ -5,9 +5,6 @@ lib/libmikmod.so
 lib/libmikmod.so.1.1
 @unexec install-info --delete %D/info/mikmod.info %D/info/dir
 info/mikmod.info
-info/mikmod.info-1
-info/mikmod.info-2
-info/mikmod.info-3
 @exec install-info %D/info/mikmod.info %D/info/dir
 share/aclocal/libmikmod.m4
 @unexec /usr/bin/env OBJFORMAT=%%PORTOBJFORMAT%% /sbin/ldconfig -R