libpng, bump version, remove non existing lib:libpng

media-libs/libpng/libpng16-1.6.37.recipe

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+SUMMARY="Portable Network Graphics library"
+DESCRIPTION="libpng is the official PNG reference library. It supports almost \
+all PNG features, is extensible, and has been extensively tested for over 17 \
+years."
+HOMEPAGE="http://www.libpng.org/"
+COPYRIGHT="1998-2018 Glenn Randers-Pehrson
+	1996-1997 Andreas Dilger
+	1995-1996 Guy Eric Schalnat, Group 42, Inc."
+LICENSE="LibPNG"
+REVISION="1"
+SOURCE_URI="https://downloads.sourceforge.net/libpng/libpng-$portVersion.tar.gz"
+CHECKSUM_SHA256="daeb2620d829575513e35fecc83f0d3791a620b9b93d800b763542ece9390fb4"
+SOURCE_DIR="libpng-$portVersion"
+
+ARCHITECTURES="x86_gcc2 x86 x86_64 arm ?ppc"
+SECONDARY_ARCHITECTURES="x86_gcc2 x86"
+
+# define libVersion as xy.z.0 when portVersion is x.y.z.
+libVersion="${portVersion/\./}.0"
+libVersionCompat="$libVersion compat >= ${libVersion%%.*}"
+portVersionCompat="$portVersion compat >= 1.6"
+
+PROVIDES="
+	libpng16$secondaryArchSuffix = $portVersionCompat
+#	lib:libpng$secondaryArchSuffix = $libVersionCompat
+	lib:libpng16$secondaryArchSuffix = $libVersionCompat
+	"
+REQUIRES="
+	haiku$secondaryArchSuffix
+	lib:libz$secondaryArchSuffix
+	"
+
+PROVIDES_devel="
+	libpng16${secondaryArchSuffix}_devel = $portVersionCompat
+	cmd:libpng16_config$secondaryArchSuffix = $portVersionCompat
+	cmd:libpng_config$secondaryArchSuffix = $portVersionCompat
+	cmd:png_fix_itxt$secondaryArchSuffix = $portVersionCompat
+	cmd:pngcp$secondaryArchSuffix = $portVersionCompat
+	cmd:pngfix$secondaryArchSuffix = $portVersionCompat
+	devel:libpng$secondaryArchSuffix = $libVersionCompat
+	devel:libpng16$secondaryArchSuffix = $libVersionCompat
+	"
+REQUIRES_devel="
+	haiku$secondaryArchSuffix
+	libpng16$secondaryArchSuffix == $portVersion base
+	lib:libz$secondaryArchSuffix
+	"
+CONFLICTS_devel="
+	libpng${secondaryArchSuffix}_devel
+	libpng12${secondaryArchSuffix}_devel
+	"
+
+BUILD_REQUIRES="
+	haiku${secondaryArchSuffix}_devel
+	devel:libz$secondaryArchSuffix >= 1.0.4
+	"
+BUILD_PREREQUIRES="
+	cmd:aclocal
+	cmd:autoconf
+	cmd:automake
+	cmd:gcc$secondaryArchSuffix
+	cmd:ld$secondaryArchSuffix
+	cmd:libtoolize$secondaryArchSuffix >= 2.4.2
+	cmd:make
+	"
+
+BUILD()
+{
+	autoreconf -f -i
+	runConfigure ./configure
+	make $jobArgs
+}
+
+INSTALL()
+{
+	make install
+
+	rm $libDir/libpng*.la
+
+	prepareInstalledDevelLibs libpng libpng16
+	fixPkgconfig
+
+	if [ -z "$secondaryArchSuffix" ]; then
+		maybe_manDir_man3=$manDir/man3
+	else
+		maybe_manDir_man3=
+		rm -rf $manDir
+	fi
+
+	# devel package
+	packageEntries devel \
+		$binDir \
+		$developDir \
+		$maybe_manDir_man3
+}
+
+TEST()
+{
+	make check
+}