diff -urN /usr/ports/graphics/apngasm/Makefile graphics/apngasm/Makefile
--- /usr/ports/graphics/apngasm/Makefile	2011-12-27 02:54:22.000000000 +0900
+++ graphics/apngasm/Makefile	2012-01-14 21:53:58.000000000 +0900
@@ -6,7 +6,7 @@
 #
 
 PORTNAME=	apngasm
-PORTVERSION=	2.3
+PORTVERSION=	2.5
 DISTVERSIONSUFFIX=-src
 CATEGORIES=	graphics
 MASTER_SITES=	SF/${PORTNAME}/${PORTVERSION}
@@ -14,20 +14,18 @@
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Create Animated PNG from a sequence of files
 
-USE_ZIP=	yes
-USE_DOS2UNIX=	yes
-NO_WRKSUBDIR=	yes
-
 LICENSE=	LGPL21 LGPL3
 LICENSE_COMB=	dual
 
-ALL_TARGET=	${PORTNAME}
-MAKEFILE=	/dev/null
-MAKE_ENV+=	LDLIBS="${LDLIBS}"
-CFLAGS+=	-I${LOCALBASE}/include
-LDFLAGS+=	-L${LOCALBASE}/lib
-LDLIBS+=	-lpng -lm -lz
+NO_WRKSUBDIR=	yes
 
+USE_ZIP=	yes
+USE_DOS2UNIX=	yes
+
+CPPFLAGS+=	`pkg-config --cflags libpng`
+LDFLAGS+=	`pkg-config --libs libpng`
+
+PORTDOCS=	readme.txt
 PLIST_FILES=	bin/${PORTNAME}
 
 .include <bsd.port.pre.mk>
@@ -39,7 +37,15 @@
 LDFLAGS+=	-static
 .endif
 
+do-build:
+	cd ${WRKSRC} && ${CC} ${CFLAGS} ${CPPFLAGS} ${PORTNAME}.c \
+		-o ${PORTNAME} ${LDFLAGS}
+
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/${PORTNAME} ${PREFIX}/bin
+.if !defined(NOPORTDOCS)
+	@${MKDIR} ${DOCSDIR}
+	${INSTALL_DATA} ${PORTDOCS:S,^,${WRKSRC}/,} ${DOCSDIR}
+.endif
 
 .include <bsd.port.post.mk>
diff -urN /usr/ports/graphics/apngasm/distinfo graphics/apngasm/distinfo
--- /usr/ports/graphics/apngasm/distinfo	2011-03-10 05:41:45.000000000 +0900
+++ graphics/apngasm/distinfo	2012-01-14 21:54:35.000000000 +0900
@@ -1,2 +1,2 @@
-SHA256 (apngasm-2.3-src.zip) = d3f13ac5800f69f3fbcfc00800f7a985273c775a800a92e26841af31ad6ab5bf
-SIZE (apngasm-2.3-src.zip) = 10540
+SHA256 (apngasm-2.5-src.zip) = e5346948f2a51328161b3ef0d2c8111cd7289c7b4ac48e72db3a617cfb4f24c5
+SIZE (apngasm-2.5-src.zip) = 11333