Switch build system from cmake to GNU configure

There are 2 benefits:
- Reduced number of build dependencies (0 now)
- This fixes build on arm64,  as configure/Makefile are more updated than
  CMakeLists.txt (CMakeLists.txt doesn't know about the arm/arm_init.c
  and arm/filter_neon_intrinsics.c files)

PR:		201425
Tested by:	Andrew Turner (on arm64)

graphics/png/Makefile

@@ -3,6 +3,7 @@
 
 PORTNAME=	png
 PORTVERSION=	1.6.17
+PORTREVISION=	1
 CATEGORIES=	graphics
 MASTER_SITES=	SF/lib${PORTNAME}/lib${PORTNAME}16/${PORTVERSION}
 PATCH_SITES=	SF/apng/lib${PORTNAME}/lib${PORTNAME}16/
@@ -11,13 +12,13 @@ DISTNAME=	lib${PORTNAME}-${PORTVERSION}
 MAINTAINER=	portmgr@FreeBSD.org
 COMMENT=	Library for manipulating PNG images
 
-USES=		cmake cpe tar:xz
+USES=		cpe libtool tar:xz
 CPE_PRODUCT=	libpng
 GNU_CONFIGURE=	yes
+CONFIGURE_ARGS=	--with-pkgconfigdir=${PREFIX}/libdata/pkgconfig
+INSTALL_TARGET=	install-strip
 USE_LDCONFIG=	yes
 
-CMAKE_ARGS+=	-DPNG_MAN_DIR:STRING=man
-
 OPTIONS_DEFINE=APNG PNGTEST
 OPTIONS_DEFAULT=APNG PNGTEST
 APNG_DESC=Enable Animated PNG support
@@ -29,11 +30,6 @@ PNGTEST_DESC=Enable Regression Test (recommended)
 PATCHFILES=	${DISTNAME}-apng.patch.gz
 .endif
 
-post-patch:
-	${REINPLACE_CMD} \
-		-e 's|LIBDIR}/pkgconfig|LIBDIR}data/pkgconfig|' \
-		${WRKSRC}/CMakeLists.txt
-
 .if ${PORT_OPTIONS:MPNGTEST}
 post-build:
 	(cd ${BUILD_WRKSRC}; if ! ${SETENV} ${MAKE_ENV} ${MAKE_CMD} ${MAKE_FLAGS} ${MAKEFILE} ${_MAKE_JOBS} ${MAKE_ARGS} test; then \

graphics/png/files/patch-CMakeLists.txt

@@ -1,12 +0,0 @@
---- CMakeLists.txt.orig	2015-03-26 13:06:23 UTC
-+++ CMakeLists.txt
-@@ -50,9 +50,6 @@ option(PNGARG        "Disable ANSI-C pro
- # SET LIBNAME
- set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR})
- 
--# to distinguish between debug and release lib
--set(CMAKE_DEBUG_POSTFIX "d")
--
- # Use the prebuilt pnglibconf.h file from the scripts folder
- # TODO: fix this by building with awk; without this no cmake build can be
- # configured directly (to do so indirectly use your local awk to build a

graphics/png/pkg-plist

@@ -1,5 +1,7 @@
 bin/libpng-config
 bin/libpng16-config
+bin/png-fix-itxt
+bin/pngfix
 include/libpng16/png.h
 include/libpng16/pngconf.h
 include/libpng16/pnglibconf.h
@@ -8,8 +10,6 @@ include/pngconf.h
 include/pnglibconf.h
 lib/libpng.a
 lib/libpng.so
-lib/libpng/libpng16-%%CMAKE_BUILD_TYPE%%.cmake
-lib/libpng/libpng16.cmake
 lib/libpng16.a
 lib/libpng16.so
 lib/libpng16.so.16