[boost] [config] BOOST_FORCEINLINE for clang

Hi, I would like to add the definition of BOOST_FORCEINLINE for clang when __has_attribute(always_inline) // BOOST_FORCEINLINE ---------------------------------------------// #if !defined(BOOST_FORCEINLINE) # if defined(_MSC_VER) # define BOOST_FORCEINLINE __forceinline +# elif defined(__clang__) +# if __has_attribute(always_inline) +# define BOOST_FORCEINLINE inline __attribute__((always_inline)) +# endif # elif defined(__GNUC__) && __GNUC__ > 3 # define BOOST_FORCEINLINE inline __attribute__ ((always_inline)) # else Could I commit it? Best, Vicente