Only check for utmps.h on HP-UX.

configure

@@ -17519,6 +17519,13 @@ printf "%s\n" "#define HAVE_DECL_SETAUTHDB $ac_have_decl" >>confdefs.h
 		# HP-UX won't unlink a shared lib that is open
 		INSTALL_BACKUP='~'
 
+		ac_fn_c_check_header_compile "$LINENO" "utmps.h" "ac_cv_header_utmps_h" "$ac_includes_default"
+if test "x$ac_cv_header_utmps_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_UTMPS_H 1" >>confdefs.h
+
+fi
+
 		ac_fn_c_check_func "$LINENO" "pstat_getproc" "ac_cv_func_pstat_getproc"
 if test "x$ac_cv_func_pstat_getproc" = xyes
 then :
@@ -17639,6 +17646,13 @@ printf "%s\n" "$sudo_cv_var_daportable" >&6; }
 			    test -z "$with_pam" && AUTH_EXCL_DEF="PAM"
 			;;
 		esac
+		ac_fn_c_check_header_compile "$LINENO" "utmps.h" "ac_cv_header_utmps_h" "$ac_includes_default"
+if test "x$ac_cv_header_utmps_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_UTMPS_H 1" >>confdefs.h
+
+fi
+
 		ac_fn_c_check_func "$LINENO" "pstat_getproc" "ac_cv_func_pstat_getproc"
 if test "x$ac_cv_func_pstat_getproc" = xyes
 then :
@@ -19321,19 +19335,15 @@ fi
 
 
 
-       for ac_header in utmps.h utmpx.h
+if test X"$ac_cv_header_utmps_h" != X"yes"; then
-do :
+    ac_fn_c_check_header_compile "$LINENO" "utmpx.h" "ac_cv_header_utmpx_h" "$ac_includes_default"
-  as_ac_Header=`printf "%s\n" "ac_cv_header_$ac_header" | $as_tr_sh`
+if test "x$ac_cv_header_utmpx_h" = xyes
-ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
-if eval test \"x\$"$as_ac_Header"\" = x"yes"
 then :
-  cat >>confdefs.h <<_ACEOF
+  printf "%s\n" "#define HAVE_UTMPX_H 1" >>confdefs.h
-#define `printf "%s\n" "HAVE_$ac_header" | $as_tr_cpp` 1
+
-_ACEOF
- break
 fi
 
-done
+fi
        for ac_header in endian.h sys/endian.h machine/endian.h
 do :
   as_ac_Header=`printf "%s\n" "ac_cv_header_$ac_header" | $as_tr_sh`
@@ -20147,7 +20157,7 @@ printf "%s\n" "$ac_cv_sizeof_time_t" >&6; }
 printf "%s\n" "#define SIZEOF_TIME_T $ac_cv_sizeof_time_t" >>confdefs.h
 
 
-if test $ac_cv_header_utmps_h = "yes"; then
+if test X"$ac_cv_header_utmps_h" = X"yes"; then
 
                 ac_fn_c_check_member "$LINENO" "struct utmps" "ut_id" "ac_cv_member_struct_utmps_ut_id" "
 #	include <sys/types.h>
@@ -20258,7 +20268,7 @@ fi
 fi
 
 
-elif test $ac_cv_header_utmpx_h = "yes"; then
+elif test X"$ac_cv_header_utmpx_h" = X"yes"; then
 
                 ac_fn_c_check_member "$LINENO" "struct utmpx" "ut_id" "ac_cv_member_struct_utmpx_ut_id" "
 #	include <sys/types.h>

configure.ac

@@ -1914,6 +1914,7 @@ case "$host" in
 		# HP-UX won't unlink a shared lib that is open
 		INSTALL_BACKUP='~'
 
+		AC_CHECK_HEADERS([utmps.h])
 		AC_CHECK_FUNCS([pstat_getproc gethrtime])
 		;;
     *-*-hpux*)
@@ -1992,6 +1993,7 @@ case "$host" in
 			    test -z "$with_pam" && AUTH_EXCL_DEF="PAM"
 			;;
 		esac
+		AC_CHECK_HEADERS([utmps.h])
 		AC_CHECK_FUNCS([pstat_getproc gethrtime])
 		;;
     *-dec-osf*)
@@ -2456,7 +2458,9 @@ AC_HEADER_DIRENT
 AC_HEADER_STDBOOL
 AC_HEADER_MAJOR
 AC_CHECK_HEADERS_ONCE([netgroup.h paths.h spawn.h wordexp.h sys/sockio.h sys/bsdtypes.h sys/select.h sys/stropts.h sys/sysmacros.h sys/statvfs.h])
-AC_CHECK_HEADERS([utmps.h] [utmpx.h], [break])
+if test X"$ac_cv_header_utmps_h" != X"yes"; then
+    AC_CHECK_HEADERS([utmpx.h])
+fi
 AC_CHECK_HEADERS([endian.h] [sys/endian.h] [machine/endian.h], [break])
 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
@@ -2553,9 +2557,9 @@ SUDO_SOCK_SIN_LEN
 AC_CHECK_SIZEOF([id_t])
 AC_CHECK_SIZEOF([long long])
 AC_CHECK_SIZEOF([time_t])
-if test $ac_cv_header_utmps_h = "yes"; then
+if test X"$ac_cv_header_utmps_h" = X"yes"; then
     SUDO_CHECK_UTMP_MEMBERS([utmps])
-elif test $ac_cv_header_utmpx_h = "yes"; then
+elif test X"$ac_cv_header_utmpx_h" = X"yes"; then
     SUDO_CHECK_UTMP_MEMBERS([utmpx])
 else
     SUDO_CHECK_UTMP_MEMBERS([utmp])