+AC_CACHE_CHECK([if libc defines sys_errlist], ac_cv_libc_defines_sys_errlist, [
+ AC_TRY_LINK([],
+ [ extern const char *const sys_errlist[]; printf("%s", sys_errlist[0]);],
+ [ ac_cv_libc_defines_sys_errlist="yes" ],
+ [ ac_cv_libc_defines_sys_errlist="no" ]
+ )
+])
+if test "x$ac_cv_libc_defines_sys_errlist" = "xyes" ; then
+ AC_DEFINE(HAVE_SYS_ERRLIST)
+fi
+
+
+AC_CACHE_CHECK([if libc defines sys_nerr], ac_cv_libc_defines_sys_nerr, [
+ AC_TRY_LINK([],
+ [ extern int sys_nerr; printf("%i", sys_nerr);],
+ [ ac_cv_libc_defines_sys_nerr="yes" ],
+ [ ac_cv_libc_defines_sys_nerr="no" ]
+ )
+])
+if test "x$ac_cv_libc_defines_sys_nerr" = "xyes" ; then
+ AC_DEFINE(HAVE_SYS_NERR)
+fi
+
+