ports: Add libpng port

ports/libpng/build.sh

@@ -0,0 +1,14 @@
+#!/bin/bash ../install.sh
+
+NAME='libpng'
+VERSION='1.6.48'
+DOWNLOAD_URL="https://download.sourceforge.net/libpng/libpng-$VERSION.tar.gz#68f3d83a79d81dfcb0a439d62b411aa257bb4973d7c67cd1ff8bdf8d011538cd"
+DEPENDENCIES=('zlib')
+
+install() {
+	make install DESTDIR="$BANAN_SYSROOT" || exit 1
+
+	# remove libtool files
+	rm -f $BANAN_SYSROOT/usr/lib/libpng.la
+	rm -f $BANAN_SYSROOT/usr/lib/libpng16.la
+}

ports/libpng/patches/0001-add-banan_os-target.patch

@@ -0,0 +1,12 @@
+diff -ruN libpng-1.6.48/config.sub libpng-1.6.48-banan_os/config.sub
+--- libpng-1.6.48/config.sub	2025-04-30 16:51:46.000000000 +0300
++++ libpng-1.6.48-banan_os/config.sub	2025-06-10 14:07:16.060041002 +0300
+@@ -1768,7 +1768,7 @@
+ 	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
+ 	     | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
+ 	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx* | zephyr* \
+-	     | fiwix* | mlibc* | cos* | mbr* | ironclad* )
++	     | fiwix* | mlibc* | cos* | mbr* | ironclad* | banan_os* )
+ 		;;
+ 	# This one is extra strict with allowed versions
+ 	sco3.2v2 | sco3.2v[4-9]* | sco5v6*)

ports/libpng/patches/0002-build-shared-libraries.patch

@@ -0,0 +1,31 @@
+diff -ruN libpng-1.6.48/configure libpng-1.6.48-banan_os/configure
+--- libpng-1.6.48/configure	2025-04-30 16:51:46.000000000 +0300
++++ libpng-1.6.48-banan_os/configure	2025-06-10 15:01:05.944037763 +0300
+@@ -6523,6 +6523,10 @@
+   lt_cv_deplibs_check_method=pass_all
+   ;;
+ 
++banan_os*)
++  lt_cv_deplibs_check_method=pass_all
++  ;;
++
+ beos*)
+   lt_cv_deplibs_check_method=pass_all
+   ;;
+@@ -12389,6 +12393,16 @@
+   esac
+   ;;
+ 
++banan_os*)
++  version_type=linux # correct to gnu/linux during the next big refactor
++  need_lib_prefix=no
++  need_version=no
++  library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext'
++  soname_spec='$libname$release$shared_ext$major'
++  dynamic_linker="$host_os DynamicLoader.so"
++  shlibpath_var=LD_LIBRARY_PATH
++  ;;
++
+ beos*)
+   library_names_spec='$libname$shared_ext'
+   dynamic_linker="$host_os ld.so"