Update tclConfig.h.in

Author: jan.nijtmans

unix/tclConfig.h.in

@@ -309,6 +309,9 @@
 /* Do we have <float.h>? */
 #undef NO_FLOAT_H
 
+/* Do we have fork() */
+#undef NO_FORK
+
 /* Do we have fstatfs()? */
 #undef NO_FSTATFS
 
@@ -324,6 +327,9 @@
 /* Do we have memmove()? */
 #undef NO_MEMMOVE
 
+/* Do we have mknod() */
+#undef NO_MKNOD
+
 /* Do we have realpath() */
 #undef NO_REALPATH
 
@@ -339,6 +345,9 @@
 /* Do we have <sys/wait.h>? */
 #undef NO_SYS_WAIT_H
 
+/* Do we have tcdrain() */
+#undef NO_TCDRAIN
+
 /* Do we have uname() */
 #undef NO_UNAME