now cmake takes snippets of code, completes them into compilable sources, builds them,
executes them and stores their output in files.
diff --git a/doc/snippets/compile_snippet.cpp.in b/doc/snippets/compile_snippet.cpp.in
new file mode 100644
index 0000000..552a5db
--- /dev/null
+++ b/doc/snippets/compile_snippet.cpp.in
@@ -0,0 +1,7 @@
+#include <Eigen/Core.h>
+USING_EIGEN_DATA_TYPES
+using namespace std;
+int main(int, char**)
+{
+${snippet_source_code}
+}