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 Using RDB Library in C++
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 1) Add "interface/c" to the include paths.
 2) Add "interface/cpp" to the include paths.
 3) Compile and link "riegl/rdb.cpp".
 4) Link library "rdblib.dll" or "librdb.so".

Alternative approach with explicit run-time linking:

 1) Add #define RDB_RUNTIME_LINKING
 2) Add "interface/c" to the include paths.
 3) Add "interface/cpp" to the include paths.
 4) Compile and link "riegl/rdb.cpp".
 5) Linux only: link library "libdl" (-ldl)
 6) Call riegl::rdb::library::load() before using any other RDB library function
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