Bug #15327: configure: --with-tcp-port option being partially ignored

make sure that if builder configured with a non-standard (!= 3306)
default TCP port that value actually gets used throughout. if they
didn't configure a value, assume "use a sensible default", which
will be read from /etc/services or, failing that, from the factory
default. That makes the order of preference
- command-line option
- my.cnf, where applicable
- $MYSQL_TCP_PORT environment variable
- /etc/services (unless configured --with-tcp-port)
- default port (--with-tcp-port=... or factory default)

scripts/Makefile.am

@@ -174,6 +174,7 @@ SUFFIXES = .sh
 	  -e 's!@''MYSQLD_DEFAULT_SWITCHES''@!@MYSQLD_DEFAULT_SWITCHES@!' \
 	  -e 's!@''MYSQL_UNIX_ADDR''@!@MYSQL_UNIX_ADDR@!' \
 	  -e 's!@''MYSQL_TCP_PORT''@!@MYSQL_TCP_PORT@!' \
+	  -e 's!@''MYSQL_TCP_PORT_DEFAULT''@!@MYSQL_TCP_PORT_DEFAULT@!' \
 	  -e 's!@''TARGET_LINUX''@!@TARGET_LINUX@!' \
 	  -e "s!@""CONF_COMMAND""@!@CONF_COMMAND@!" \
 	  -e 's!@''MYSQLD_USER''@!@MYSQLD_USER@!' \

scripts/mysql_config.sh

@@ -92,9 +92,14 @@ fix_path pkgincludedir include/mysql include
 
 version='@VERSION@'
 socket='@MYSQL_UNIX_ADDR@'
-port='@MYSQL_TCP_PORT@'
 ldflags='@LDFLAGS@'
 
+if [ @MYSQL_TCP_PORT_DEFAULT@ -eq 0 ]; then
+  port=0
+else
+  port=@MYSQL_TCP_PORT@
+fi
+
 # Create options 
 # We intentionally add a space to the beginning and end of lib strings, simplifies replace later
 libs=" $ldflags -L$pkglibdir -lmysqlclient @ZLIB_DEPS@ @NON_THREADED_LIBS@"

scripts/mysql_fix_privilege_tables.sh

@@ -25,6 +25,7 @@ sql_only=0
 basedir="@prefix@"
 verbose=0
 args=""
+# no elaborate fallback here; with no argument, it will happen in "mysql"
 port=""
 socket=""
 database="mysql"

scripts/mysqld_safe-watch.sh

@@ -66,7 +66,7 @@ fi
 echo "Starting mysqld demon with databases from $DATADIR"
 
 #Default communication ports
-#MYSQL_TCP_PORT=3306
+#MYSQL_TCP_PORT=@MYSQL_TCP_PORT@
 if test -z "$MYSQL_UNIX_PORT"
 then
   MYSQL_UNIX_PORT="/tmp/mysql.sock"