Fix shortcircuit of 127.0.0.1 -> localhost lookup on little-endian machines. (Bug #11822)

(Originally:   1.1891 05/07/25 12:07:47 jimw@mysql.com )


configure.in:
  Modify version number.
sql/hostname.cc:
  Fix comparison against INADDR_LOOPBACK to deal with endianness.
  (Originally applied to "sql/hostname.cpp":   1.31 05/07/25 12:07:44 jimw@mysql.com )

configure.in

@@ -6,7 +6,7 @@ AC_PREREQ(2.57)dnl		Minimum Autoconf version required.
 AC_INIT(sql/mysqld.cc)
 AC_CANONICAL_SYSTEM
 # Don't forget to also update the NDB lines below.
-AM_INIT_AUTOMAKE(mysql, 5.0.10-beta)
+AM_INIT_AUTOMAKE(mysql, 5.0.10a-beta)
 AM_CONFIG_HEADER(config.h)
 
 PROTOCOL_VERSION=10

sql/hostname.cc

@@ -143,8 +143,8 @@ my_string ip_to_hostname(struct in_addr *in, uint *errors)
   *errors=0;
 
   /* We always treat the loopback address as "localhost". */
-  if (in->s_addr == INADDR_LOOPBACK)
-    return (char *)my_localhost;
+  if (in->s_addr == htonl(INADDR_LOOPBACK))   // is expanded inline by gcc
+    DBUG_RETURN((char *)my_localhost);
 
   /* Check first if we have name in cache */
   if (!(specialflag & SPECIAL_NO_HOST_CACHE))