dnl for each function found we get a definition in config.h
dnl of the form HAVE_FUNCTION
-AC_CHECK_FUNCS(tzset fsync mbstowcs opendir readdir chdir chroot getuid setlocale strerror strerror_r snprintf vsnprintf fpclass class fp_class isnan memmove strchr mktime getrusage gettimeofday)
+AC_CHECK_FUNCS(tzset fsync mbstowcs opendir readdir chdir chroot getuid setlocale strerror snprintf vsnprintf fpclass class fp_class isnan memmove strchr mktime getrusage gettimeofday)
+
+AC_FUNC_STRERROR_R
CONFIGURE_PART(Map/Fadvis/Madvise checking)