component/jsoncpp: add JsonCpp component

component/jsoncpp/buildout.cfg

+[buildout]
+extends =
+  ../cmake/buildout.cfg
+  ../pkgconfig/buildout.cfg
+
+parts =
+  jsoncpp
+
+[jsoncpp]
+recipe = slapos.recipe.cmmi
+shared = true
+pre-configure =
+  mkdir jsoncpp-build
+configure-command =
+  cd jsoncpp-build && ${cmake:location}/bin/cmake ..
+configure-options =
+  -DCMAKE_INSTALL_PREFIX=@@LOCATION@@
+url = https://github.com/open-source-parsers/jsoncpp/archive/refs/tags/1.9.5.tar.gz
+md5sum = d6c8c609f2162eff373db62b90a051c7
+make-binary =
+  cd jsoncpp-build && make
+environment =
+  PATH=${pkgconfig:location}/bin:%(PATH)s