dnl Check for usual libc functions
AC_CHECK_FUNCS([gettimeofday isatty sigrelse getpwuid_r memalign posix_memalign if_nametoindex getenv putenv setenv ctime_r daemon fork lstat posix_fadvise posix_madvise uselocale])
-AC_FUNC_ALLOCA
AC_CHECK_FUNCS(fcntl)
AC_REPLACE_FUNCS([asprintf atof atoll getcwd getpid gmtime_r lldiv localtime_r rewind strcasecmp strcasestr strdup strlcpy strncasecmp strndup strnlen strsep strtof strtoll vasprintf swab])
AC_CHECK_FUNCS([stricmp strnicmp])