This way, there will be no compiler warnings if the symbol is used
in a way akin to
#if OPM_HAVE_BOOST
/* Boost is available */
#else
/* Boost is not available */
#endif
This way, there will be no compiler warnings if the symbol is used
in a way akin to
#if OPM_HAVE_BOOST
/* Boost is available */
#else
/* Boost is not available */
#endif