png: add libpng port

build.sh

@@ -65,6 +65,7 @@ ports=(
 	"coremark"
 	"coreMQTT"
 	"lsb_vsx"
+	"libpng"
 )
 
 

libpng/build.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+
+set -e
+
+appname="libpng"
+version="1.6.44"
+archive_filename="${appname}-${version}.tar.gz"
+
+PREFIX_PORT_SRC="${PREFIX_PORT_BUILD}/${appname}-${version}/"
+
+b_port_download "http://prdownloads.sourceforge.net/libpng/" "${archive_filename}"
+
+if [ ! -d "${PREFIX_PORT_SRC}" ]; then
+	echo "Extracting sources from ${archive_filename}"
+	mkdir -p "${PREFIX_PORT_SRC}"
+	tar -axf "${PREFIX_PORT}/${archive_filename}" --strip-components 1 -C "${PREFIX_PORT_SRC}"
+fi
+
+b_port_apply_patches "${PREFIX_PORT_SRC}"
+
+if [ ! -f "${PREFIX_PORT_SRC}/config.status" ]; then
+	(cd "${PREFIX_PORT_SRC}" && autoreconf -vfi &&
+		"${PREFIX_PORT_SRC}/configure" CFLAGS="${CFLAGS}" LDFLAGS="${LDFLAGS}" \
+		--host="${HOST}" --bindir="${PREFIX_PROG}" --sbindir="${PREFIX_PROG}" \
+		--libdir="${PREFIX_A}" --includedir="${PREFIX_H}" --datarootdir="${PREFIX_A}" \
+		--disable-shared --enable-static --enable-silent-rules \
+		--disable-tests --disable-tools
+	)
+fi
+
+make -C "${PREFIX_PORT_SRC}"
+make -C "${PREFIX_PORT_SRC}" install

libpng/patches/01-Makefile.am.patch

@@ -0,0 +1,12 @@
+diff -ruN a/Makefile.am b/Makefile.am
+--- a/Makefile.am	2024-10-18 10:20:12.884467503 +0200
++++ b/Makefile.am	2024-10-18 10:19:21.813487165 +0200
+@@ -301,7 +301,7 @@
+ 	rm -f $@ $*.tf[12]
+ 	test -d scripts || mkdir scripts || test -d scripts
+ 	$(DFNCPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES)\
+-	    $(CPPFLAGS) $(SYMBOL_CFLAGS) $< > $*.tf1
++	    $(CFLAGS) $(CPPFLAGS) $(SYMBOL_CFLAGS) $< > $*.tf1
+ 	$(AWK) -f "${srcdir}/scripts/dfn.awk" out="$*.tf2" $*.tf1 1>&2
+ 	rm -f $*.tf1
+ 	mv $*.tf2 $@