Radix cross Linux 3pp sources

diff --git a/packages/l/json-c/Makefile b/packages/l/json-c/Makefile
new file mode 100644
index 0000000..563b82b
--- /dev/null
+++ b/packages/l/json-c/Makefile
@@ -0,0 +1,50 @@
+#
+# Project Home:
+# ============
+# http://www.json.org
+# https://github.com/json-c/json-c/wiki
+# https://github.com/json-c/json-c
+#
+# Releases:
+# https://github.com/json-c/json-c/releases
+#
+# Downloads:
+# =========
+# https://github.com/json-c/json-c/archive
+#
+
+url         = https://github.com/json-c/json-c/archive/refs/tags
+
+versions    = 0.11-20130402 0.12-20140410 0.13.1-20180305 0.15-20200726
+
+pkgname     = json-c
+suffix      = tar.gz
+
+tarballs    = $(foreach v,$(versions),$(addsuffix .$(suffix),$(addprefix $(pkgname)-,$(shell echo $(v) | cut -f 1 -d '-'))))
+sha1s       = $(addsuffix .sha1sum, $(tarballs))
+
+
+all: $(tarballs) $(signatures) $(sha1s)
+
+.PHONY: downloads_clean
+
+$(tarballs):
+	@echo -e "\n======= Downloading source tarballs =======\n"
+	@for version in $(versions) ; do \
+	  v=`echo $$version | cut -f 1 -d '-'` ; \
+	  wget -N $(url)/$(pkgname)-$${version}.$(suffix) ; \
+	  tar xzf $(pkgname)-$${version}.$(suffix) ; \
+	  rm -f $(pkgname)-$${version}.$(suffix) ; \
+	  mv $(pkgname)-$(pkgname)-$${version} $(pkgname)-$$v ; \
+	  tar czf $(pkgname)-$$v.$(suffix) $(pkgname)-$$v ; \
+	  rm -rf $(pkgname)-$$v ; \
+	done
+
+$(sha1s): %.$(suffix).sha1sum : %.$(suffix)
+	@for tarball in $< ; do \
+	  echo -e "\n======= Calculation the '$$tarball' sha1sum =======\n" ; \
+	  sha1sum --binary $$tarball > $$tarball.sha1sum ; \
+	done
+
+downloads_clean:
+	@rm -rf $(tarballs) $(sha1s)