* configure.ac: Call AC_REPLACE_FUNCS on ffsll. * gold.h (ffsll): Declare if HAVE_FFSLL is not defined. * ftruncate.c (ftruncate): Declare before definition. * mremap.c (mremap): Likewise. * pread.c (pread): Likewise. * configure, Makefile.in, config.in: Rebuild.