Merge branch 'remove-NOPNG' into 'next'

if PNG graphics support is removed, it is not netplay compatible

See merge request !2260

src/Makefile

@@ -47,8 +47,6 @@
 # HAVE_MINIUPNPC=1 - Enable automated port forwarding.
 #                    Already enabled by default for 32-bit
 #                    Windows.
-# NOPNG=1 - Disable PNG graphics support. (TODO: double
-#           check netplay compatible.)
 # NOCURL=1 - Disable libcurl--HTTP capability.
 # NOGME=1 - Disable game music emu, retro VGM support.
 # NOOPENMPT=1 - Disable module (tracker) music support.
@@ -69,8 +67,6 @@
 # NOEXECINFO=1 - Disable stack trace dump support
 # DEBUGMODE=1 - Enable various debugging capabilities.
 #               Also disables optimizations.
-# NOZLIB=1 - Disable some compression capability. Implies
-#            NOPNG=1.
 #
 # Development flags:
 #

src/Makefile.d/features.mk

@@ -22,8 +22,6 @@ ifndef NOMD5
 sources+=md5.c
 endif
 
-ifndef NOZLIB
-ifndef NOPNG
 ifdef PNG_PKGCONFIG
 $(eval $(call Use_pkg_config,PNG_PKGCONFIG))
 else
@@ -36,8 +34,6 @@ opts+=-D_LARGEFILE64_SOURCE
 endif
 opts+=-DHAVE_PNG
 sources+=apng.c
-endif
-endif
 
 ifndef NOCURL
 CURLCONFIG?=curl-config