Radix cross Linux 3pp sources

diff --git a/packages/x/Makefile b/packages/x/Makefile
index a6f1afd..0d12775 100644
--- a/packages/x/Makefile
+++ b/packages/x/Makefile
@@ -11,6 +11,7 @@ SUBDIRS := Vulkan               \
            ayatana              \
            babl                 \
            blueman              \
+           cfitsio              \
            conky                \
            dejavu-fonts         \
            dejavu-fonts-ttf     \
diff --git a/packages/x/cfitsio/Makefile b/packages/x/cfitsio/Makefile
new file mode 100644
index 0000000..24b8cc2
--- /dev/null
+++ b/packages/x/cfitsio/Makefile
@@ -0,0 +1,39 @@
+#
+# Project Home:
+# ============
+#   https://heasarc.gsfc.nasa.gov/fitsio/
+#
+# Downloads:
+# =========
+#   https://heasarc.gsfc.nasa.gov/FTP/software/fitsio/c/
+#
+
+url         = https://heasarc.gsfc.nasa.gov/FTP/software/fitsio/c
+
+versions    = 4.3.1
+
+pkgname     = cfitsio
+suffix      = tar.gz
+
+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 \
+	  wget -N $(url)/$$tarball ; \
+	done
+
+$(sha1s): %.$(suffix).sha1sum : %.$(suffix)
+	@for tarball in $< ; do \
+	  echo -e "\n======= Calculation the '$$tarball' sha1sum =======\n" ; \
+	  sha1sum --binary $$tarball > $$tarball.sha1sum ; \
+	done
+
+downloads_clean:
+	@rm -rf $(tarballs) $(sha1s)