Radix cross Linux 3pp sources

diff --git a/packages/l/libpng/Makefile b/packages/l/libpng/Makefile
new file mode 100644
index 0000000..1413b5f
--- /dev/null
+++ b/packages/l/libpng/Makefile
@@ -0,0 +1,27 @@
+
+#
+# Following command helps to cheate SUBDIRS list:
+# $ tree -fid .
+#
+
+SUBDIRS := libpng12 \
+           libpng14 \
+           libpng15 \
+           libpng16
+
+
+all-recursive downloads_clean-recursive:
+	@set fnord $(MAKEFLAGS); amf=$$2; \
+	target=`echo $@ | sed s/-recursive//`; \
+	list='$(SUBDIRS)'; for subdir in $$list; do \
+	  echo "Making $$target in $$subdir"; \
+	  local_target="$$target"; \
+	  (cd $$subdir && $(MAKE) $$fnord $$local_target) \
+	   || case "$$amf" in *=*) exit 1;; *k*) fail=yes;; *) exit 1;; esac; \
+	done; test -z "$$fail"
+
+all: all-recursive
+
+downloads_clean: downloads_clean-recursive
+
+.PHONY: all-recursive downloads_clean-recursive all downloads_clean
diff --git a/packages/l/libpng/libpng12/Makefile b/packages/l/libpng/libpng12/Makefile
new file mode 100644
index 0000000..74c5cec
--- /dev/null
+++ b/packages/l/libpng/libpng12/Makefile
@@ -0,0 +1,43 @@
+#
+# Project Home:
+# ============
+# https://www.libpng.org
+# https://www.libpng.org/pub/png/libpng.html
+# https://libpng.sourceforge.net/index.html
+#
+# Downloads:
+# =========
+# https://sourceforge.net/projects/libpng/files/libpng12
+#
+
+url         = https://downloads.sourceforge.net/project/libpng
+
+versions    = 1.2.59
+
+pkgname     = libpng
+suffix      = tar.xz
+
+tarballs    = $(addsuffix .$(suffix), $(addprefix $(pkgname)-, $(versions)))
+sha1s       = $(addsuffix .sha1sum, $(tarballs))
+
+
+all: $(tarballs) $(sha1s)
+
+.PHONY: downloads_clean
+
+$(tarballs):
+	@echo -e "\n======= Downloading source tarballs =======\n"
+	@for tarball in $(tarballs) ; do \
+	  version=`echo $$tarball | sed 's/\([a-zA-Z-]*\)\([0-9]*[\.][0-9]*[\.][0-9]*\)\(\..*\)/\2/'` ; \
+	    major=`echo $$version | sed 's/\([0-9]*[\.][0-9]*\)\([\.][0-9]*\)/\1/' | sed 's/\.//g'` ; \
+	  wget -N $(url)/$(pkgname)$$major/$$version/$$tarball ; \
+	done
+
+$(sha1s): %.$(suffix).sha1sum : %.$(suffix)
+	@for tarball in $< ; do \
+	  echo -e "\n======= Calculation the '$$tarball' sha1sum =======\n" ; \
+	  sha1sum --binary $$tarball > $$tarball.sha1sum ; \
+	done
+
+downloads_clean:
+	@rm -rf $(tarballs) $(sha1s)
diff --git a/packages/l/libpng/libpng14/Makefile b/packages/l/libpng/libpng14/Makefile
new file mode 100644
index 0000000..e49865a
--- /dev/null
+++ b/packages/l/libpng/libpng14/Makefile
@@ -0,0 +1,43 @@
+#
+# Project Home:
+# ============
+# https://www.libpng.org
+# https://www.libpng.org/pub/png/libpng.html
+# https://libpng.sourceforge.net/index.html
+#
+# Downloads:
+# =========
+# https://sourceforge.net/projects/libpng/files/libpng14
+#
+
+url         = https://downloads.sourceforge.net/project/libpng
+
+versions    = 1.4.22
+
+pkgname     = libpng
+suffix      = tar.xz
+
+tarballs    = $(addsuffix .$(suffix), $(addprefix $(pkgname)-, $(versions)))
+sha1s       = $(addsuffix .sha1sum, $(tarballs))
+
+
+all: $(tarballs) $(sha1s)
+
+.PHONY: downloads_clean
+
+$(tarballs):
+	@echo -e "\n======= Downloading source tarballs =======\n"
+	@for tarball in $(tarballs) ; do \
+	  version=`echo $$tarball | sed 's/\([a-zA-Z-]*\)\([0-9]*[\.][0-9]*[\.][0-9]*\)\(\..*\)/\2/'` ; \
+	    major=`echo $$version | sed 's/\([0-9]*[\.][0-9]*\)\([\.][0-9]*\)/\1/' | sed 's/\.//g'` ; \
+	  wget -N $(url)/$(pkgname)$$major/$$version/$$tarball ; \
+	done
+
+$(sha1s): %.$(suffix).sha1sum : %.$(suffix)
+	@for tarball in $< ; do \
+	  echo -e "\n======= Calculation the '$$tarball' sha1sum =======\n" ; \
+	  sha1sum --binary $$tarball > $$tarball.sha1sum ; \
+	done
+
+downloads_clean:
+	@rm -rf $(tarballs) $(sha1s)
diff --git a/packages/l/libpng/libpng15/Makefile b/packages/l/libpng/libpng15/Makefile
new file mode 100644
index 0000000..f0fd23d
--- /dev/null
+++ b/packages/l/libpng/libpng15/Makefile
@@ -0,0 +1,43 @@
+#
+# Project Home:
+# ============
+# https://www.libpng.org
+# https://www.libpng.org/pub/png/libpng.html
+# https://libpng.sourceforge.net/index.html
+#
+# Downloads:
+# =========
+# https://sourceforge.net/projects/libpng/files/libpng15
+#
+
+url         = https://downloads.sourceforge.net/project/libpng
+
+versions    = 1.5.30
+
+pkgname     = libpng
+suffix      = tar.xz
+
+tarballs    = $(addsuffix .$(suffix), $(addprefix $(pkgname)-, $(versions)))
+sha1s       = $(addsuffix .sha1sum, $(tarballs))
+
+
+all: $(tarballs) $(sha1s)
+
+.PHONY: downloads_clean
+
+$(tarballs):
+	@echo -e "\n======= Downloading source tarballs =======\n"
+	@for tarball in $(tarballs) ; do \
+	  version=`echo $$tarball | sed 's/\([a-zA-Z-]*\)\([0-9]*[\.][0-9]*[\.][0-9]*\)\(\..*\)/\2/'` ; \
+	    major=`echo $$version | sed 's/\([0-9]*[\.][0-9]*\)\([\.][0-9]*\)/\1/' | sed 's/\.//g'` ; \
+	  wget -N $(url)/$(pkgname)$$major/$$version/$$tarball ; \
+	done
+
+$(sha1s): %.$(suffix).sha1sum : %.$(suffix)
+	@for tarball in $< ; do \
+	  echo -e "\n======= Calculation the '$$tarball' sha1sum =======\n" ; \
+	  sha1sum --binary $$tarball > $$tarball.sha1sum ; \
+	done
+
+downloads_clean:
+	@rm -rf $(tarballs) $(sha1s)
diff --git a/packages/l/libpng/libpng16/Makefile b/packages/l/libpng/libpng16/Makefile
new file mode 100644
index 0000000..76dca55
--- /dev/null
+++ b/packages/l/libpng/libpng16/Makefile
@@ -0,0 +1,43 @@
+#
+# Project Home:
+# ============
+# https://www.libpng.org
+# https://www.libpng.org/pub/png/libpng.html
+# https://libpng.sourceforge.net/index.html
+#
+# Downloads:
+# =========
+# https://sourceforge.net/projects/libpng/files/libpng16
+#
+
+url         = https://downloads.sourceforge.net/project/libpng
+
+versions    = 1.6.37
+
+pkgname     = libpng
+suffix      = tar.xz
+
+tarballs    = $(addsuffix .$(suffix), $(addprefix $(pkgname)-, $(versions)))
+sha1s       = $(addsuffix .sha1sum, $(tarballs))
+
+
+all: $(tarballs) $(sha1s)
+
+.PHONY: downloads_clean
+
+$(tarballs):
+	@echo -e "\n======= Downloading source tarballs =======\n"
+	@for tarball in $(tarballs) ; do \
+	  version=`echo $$tarball | sed 's/\([a-zA-Z-]*\)\([0-9]*[\.][0-9]*[\.][0-9]*\)\(\..*\)/\2/'` ; \
+	    major=`echo $$version | sed 's/\([0-9]*[\.][0-9]*\)\([\.][0-9]*\)/\1/' | sed 's/\.//g'` ; \
+	  wget -N $(url)/$(pkgname)$$major/$$version/$$tarball ; \
+	done
+
+$(sha1s): %.$(suffix).sha1sum : %.$(suffix)
+	@for tarball in $< ; do \
+	  echo -e "\n======= Calculation the '$$tarball' sha1sum =======\n" ; \
+	  sha1sum --binary $$tarball > $$tarball.sha1sum ; \
+	done
+
+downloads_clean:
+	@rm -rf $(tarballs) $(sha1s)