dnl for each function found we get a definition in config.h
dnl of the form HAVE_FUNCTION
-AC_CHECK_FUNCS(tzset opendir readdir chdir chroot getuid setlocale strerror snprintf vsnprintf fpclass class fp_class isnan memmove strchr mktime getrusage gettimeofday)
+AC_CHECK_FUNCS(tzset opendir readdir chdir chroot getuid setlocale strerror strerror_r snprintf vsnprintf fpclass class fp_class isnan memmove strchr mktime getrusage gettimeofday)
dnl HP-UX 11.00 does not have finite but does have isfinite as a macro
AC_CHECK_FUNCS(fpclassify, ,