Radix cross Linux 3pp sources

diff --git a/packages/a/btrfs-progs/Makefile b/packages/a/btrfs-progs/Makefile
new file mode 100644
index 0000000..d45a70b
--- /dev/null
+++ b/packages/a/btrfs-progs/Makefile
@@ -0,0 +1,69 @@
+#
+# Project Home:
+# ============
+#   https://btrfs.readthedocs.io
+#
+# CGit:
+#   https://git.kernel.org/cgit/linux/kernel/git/mason/btrfs-progs.git
+#
+# Clone:
+# =====
+#   git clone git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-progs.git
+#
+
+url        = https://git.kernel.org/pub/scm/linux/kernel/git/kdave/btrfs-progs.git
+
+repo_name  = btrfs-progs
+
+versions   = 3.16 4.4 5.3 5.10.1 5.11 5.15.1 6.2.2
+
+suffix     = tar.xz
+
+# List of tags to be extracted:
+TAGS       = $(addprefix v, $(versions))
+
+git_repo   = .git_clone
+tarballs   = $(addsuffix .$(suffix), $(addprefix $(repo_name)-, $(versions)))
+sha1s      = $(addsuffix .sha1sum, $(tarballs))
+
+TARGETS = repository_clean
+
+
+all: $(TARGETS)
+
+.PHONY: downloads_clean repository_clean
+
+$(git_repo):
+	@echo -e "\n======= Clone $(repo_name).git repository =======\n"
+	@rm -rf $(repo_name)
+	@if [ "$(url)" = 'git://radix.pro' ]; then \
+	   git clone $(url)/$(repo_name).git $(repo_name) ; \
+	 else \
+	   git clone $(url) $(repo_name) ; \
+	 fi
+	@touch $@
+
+$(tarballs): $(git_repo)
+	@for version in $(versions) ; do \
+	  tag=v`echo $$version` ; \
+	  if [ ! -f $(repo_name)-$$version.$(suffix) ]; then \
+	    echo -e "\n======= Creating '$(repo_name)-$$version.$(suffix)' snapshot =======" ; \
+	    ( cd $(repo_name) && \
+	      git archive --format=tar --prefix=$(repo_name)-$$version/ $$tag | \
+	      xz >../$(repo_name)-$$version.$(suffix) ) ; \
+	  fi ; \
+	done
+
+$(sha1s): %.$(suffix).sha1sum : %.$(suffix)
+	@for tarball in $< ; do \
+	  echo -e "\n======= Calculation the '$$tarball' sha1sum =======" ; \
+	  sha1sum --binary $$tarball > $$tarball.sha1sum ; \
+	done
+
+repository_clean: $(sha1s)
+	@echo -e "\n======= Remove cloned $(repo_name).git repository =======\n"
+	@rm -rf $(git_repo) $(repo_name)
+
+downloads_clean:
+	@rm -rf $(tarballs) $(sha1s)
+	@rm -rf $(git_repo) $(repo_name)