NAME ffs, ffsl, ffsll - find first bit set in a word LIBRARY Standard C library ... ffsl(long i ); int ffsll(long long i ); Feature Test Macro Requirements for glibcNAME ffs, ffsl, ffsll - find first bit set in a word LIBRARY Standard C library ... ffsl(long i ); int ffsll(long long i ); Feature Test Macro Requirements for glibcNAME ffs, ffsl, ffsll - find first bit set in a word LIBRARY Standard C library ... ffsl(long i ); int ffsll(long long i ); Feature Test Macro Requirements for glibc