MSVC_BUILTIN 21 maint/gnulib/lib/ffsl.c #define MSVC_BUILTIN _BitScanForward MSVC_BUILTIN 22 maint/gnulib/lib/ffsll.c # define MSVC_BUILTIN _BitScanForward64 MSVC_BUILTIN 35 maint/gnulib/lib/integer_length_l.c # define MSVC_BUILTIN _BitScanReverse64 MSVC_BUILTIN 41 maint/gnulib/lib/integer_length_l.c # define MSVC_BUILTIN _BitScanReverse