+if HAVE_PROTOC_C
+ protoc-c -I$(srcdir) --c_out . $(srcdir)/riemann.proto
+else
+ @echo "INFO Could not find protoc-c. This tool is necessary to generate $@"
+ @echo "INFO Check http://code.google.com/p/protobuf-c for more information"
+ @echo "INFO Note : package for Debian (Ubuntu...) is protobuf-c-compiler and protobuf-c0-dev will also be needed"
+ @echo "INFO Note : package for Fedora (Redhat, Centos...) is protobuf-c and protobuf-c-devel will also be needed"
+endif