* s/irix6-5.h (PTY_OPEN): Declare stb, to loosen coupling.

* process.c (allocate_pty): Don't declare stb unless it's needed.

src/ChangeLog

 2011-03-17  Paul Eggert  <eggert@cs.ucla.edu>
 
+	* s/irix6-5.h (PTY_OPEN): Declare stb, to loosen coupling.
+	* process.c (allocate_pty): Don't declare stb unless it's needed.
+
 	* bytecode.c (MAYBE_GC): Rewrite so as not to use empty "else".
 	(CONSTANTLIM): Remove; unused.
 	(METER_CODE, Bscan_buffer, Bread_char, Bset_mark):

src/process.c

@@ -545,7 +545,6 @@ allocate_pty (void)
     for (i = 0; i < 16; i++)
 #endif
       {
-	struct stat stb;	/* Used in some PTY_OPEN.  */
 #ifdef PTY_NAME_SPRINTF
 	PTY_NAME_SPRINTF
 #else
@@ -562,6 +561,7 @@ allocate_pty (void)
 	       three failures in a row before deciding that we've reached the
 	       end of the ptys.  */
 	    int failed_count = 0;
+	    struct stat stb;
 
 	    if (stat (pty_name, &stb) < 0)
 	      {

src/s/irix6-5.h

@@ -60,6 +60,7 @@ char *_getpty();
 #define PTY_OPEN					    \
 {							    \
   struct sigaction ocstat, cstat;			    \
+  struct stat stb;					    \
   char * name;						    \
   sigemptyset(&cstat.sa_mask);				    \
   cstat.sa_handler = SIG_DFL;				    \
@@ -95,5 +96,3 @@ char *_getpty();
 /* Tested on Irix 6.5.  SCM worked on earlier versions.  */
 #define GC_SETJMP_WORKS 1
 #define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
-
-