Use AC_HEADER_MAJOR to determine where major/minor are defined.

config.h.in

@@ -602,9 +602,6 @@
    */
 #undef HAVE_SYS_DIR_H
 
-/* Define to 1 if you have the <sys/mkdev.h> header file. */
-#undef HAVE_SYS_MKDEV_H
-
 /* Define to 1 if you have the <sys/ndir.h> header file, and it defines `DIR'.
    */
 #undef HAVE_SYS_NDIR_H
@@ -709,6 +706,14 @@
 /* The user or email address that sudo mail is sent to. */
 #undef MAILTO
 
+/* Define to 1 if `major', `minor', and `makedev' are declared in <mkdev.h>.
+   */
+#undef MAJOR_IN_MKDEV
+
+/* Define to 1 if `major', `minor', and `makedev' are declared in
+   <sysmacros.h>. */
+#undef MAJOR_IN_SYSMACROS
+
 /* The max number of chars per log file line (for line wrapping). */
 #undef MAXLOGFILELEN
 

configure

@@ -15235,7 +15235,57 @@ $as_echo "#define HAVE_STDBOOL_H 1" >>confdefs.h
 
 fi
 
-for ac_header in malloc.h netgroup.h paths.h spawn.h utime.h utmpx.h sys/sockio.h sys/bsdtypes.h sys/mkdev.h sys/select.h sys/stropts.h sys/sysmacros.h
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether sys/types.h defines makedev" >&5
+$as_echo_n "checking whether sys/types.h defines makedev... " >&6; }
+if ${ac_cv_header_sys_types_h_makedev+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+int
+main ()
+{
+return makedev(0, 0);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_header_sys_types_h_makedev=yes
+else
+  ac_cv_header_sys_types_h_makedev=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_sys_types_h_makedev" >&5
+$as_echo "$ac_cv_header_sys_types_h_makedev" >&6; }
+
+if test $ac_cv_header_sys_types_h_makedev = no; then
+ac_fn_c_check_header_mongrel "$LINENO" "sys/mkdev.h" "ac_cv_header_sys_mkdev_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_mkdev_h" = xyes; then :
+
+$as_echo "#define MAJOR_IN_MKDEV 1" >>confdefs.h
+
+fi
+
+
+
+  if test $ac_cv_header_sys_mkdev_h = no; then
+    ac_fn_c_check_header_mongrel "$LINENO" "sys/sysmacros.h" "ac_cv_header_sys_sysmacros_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_sysmacros_h" = xyes; then :
+
+$as_echo "#define MAJOR_IN_SYSMACROS 1" >>confdefs.h
+
+fi
+
+
+  fi
+fi
+
+for ac_header in malloc.h netgroup.h paths.h spawn.h utime.h utmpx.h sys/sockio.h sys/bsdtypes.h sys/select.h sys/stropts.h sys/sysmacros.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"

configure.in

@@ -2006,7 +2006,8 @@ AC_HEADER_STDC
 AC_HEADER_DIRENT
 AC_HEADER_TIME
 AC_HEADER_STDBOOL
-AC_CHECK_HEADERS(malloc.h netgroup.h paths.h spawn.h utime.h utmpx.h sys/sockio.h sys/bsdtypes.h sys/mkdev.h sys/select.h sys/stropts.h sys/sysmacros.h)
+AC_HEADER_MAJOR
+AC_CHECK_HEADERS(malloc.h netgroup.h paths.h spawn.h utime.h utmpx.h sys/sockio.h sys/bsdtypes.h sys/select.h sys/stropts.h sys/sysmacros.h)
 AC_CHECK_HEADERS([procfs.h] [sys/procfs.h], [AC_CHECK_MEMBERS(struct psinfo.pr_ttydev, [AC_CHECK_FUNCS(_ttyname_dev)], [], [AC_INCLUDES_DEFAULT
 #ifdef HAVE_PROCFS_H
 #include <procfs.h>

src/ttyname.c

@@ -25,9 +25,9 @@
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/stat.h>
-#if defined(HAVE_SYS_MKDEV_H)
+#if defined(MAJOR_IN_MKDEV)
 # include <sys/mkdev.h>
-#elif defined(HAVE_SYS_SYSMACROS_H)
+#elif defined(MAJOR_IN_SYSMACROS)
 # include <sys/sysmacros.h>
 #endif
 #include <stdio.h>