It looks like a lot of AC_FUNC_* macros are not cross-compile-friendly, as they use AC_RUN_IFELSE.
Is an appropriate way to deal with these to set environment variables before running config, to tell it what it can't figure out itself? e.g. ac_cv_func_mmap_fixed_mapped=yes ./configure ? That seems to do it for betaftpd. - Dan p.s. here are some of the macros in question: AC_FUNC_CHOWN AC_FUNC_CLOSEDIR_VOID AC_FUNC_FNMATCH AC_FUNC_GETGROUPS AC_FUNC_GETPGRP AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK AC_FUNC_MALLOC AC_FUNC_MEMCMP AC_FUNC_MKTIME AC_FUNC_MMAP AC_FUNC_SETPGRP AC_FUNC_STRTOD AC_FUNC_STRERROR_R AC_FUNC_STRCOLL AC_FUNC_UTIME_NULL AC_FUNC_FORK AC_FUNC_WAIT3
