xm-iris4.h: Delete #if 0 block (there since before 1997).

	* mips/xm-iris4.h: Delete #if 0 block (there since before 1997).
	* pa/xm-linux.h, pa/xm-pa.h, pa/xm-papro.h: Don't declare errno.

From-SVN: r40107

gcc/ChangeLog

+2001-02-27  Zack Weinberg  <zackw@stanford.edu>
+
+	* mips/xm-iris4.h: Delete #if 0 block (there since before 1997).
+	* pa/xm-linux.h, pa/xm-pa.h, pa/xm-papro.h: Don't declare errno.
+
 2001-02-27  Diego Novillo  <dnovillo@redhat.com>
 
 	* c-common.c (walk_stmt_tree): Visit the chain of the current tree

gcc/config/mips/xm-iris4.h

 #include "mips/xm-mips.h"
 
 #define USG
-
-#if 0
-#ifdef __GNUC__
-/* The normal irix compiler requires alloca.h or alloca doesn't work.
-   However, the IRIX compiler doesn't allow alloca to be stored in
-   something like ptr->field = alloca(), so we just use the normal
-   C alloca.  */
-#include <alloca.h>
-#endif
-#endif

gcc/config/pa/xm-linux.h

@@ -18,9 +18,6 @@ along with GNU CC; see the file COPYING.  If not, write to
 the Free Software Foundation, 59 Temple Place - Suite 330,
 Boston, MA 02111-1307, USA.  */
 
-
-extern int errno;
-
 /* #defines that need visibility everywhere.  */
 #define FALSE 0
 #define TRUE 1

gcc/config/pa/xm-pa.h

@@ -19,8 +19,6 @@ along with GNU CC; see the file COPYING.  If not, write to
 the Free Software Foundation, 59 Temple Place - Suite 330,
 Boston, MA 02111-1307, USA.  */
 
-extern int errno;
-
 /* #defines that need visibility everywhere.  */
 #define FALSE 0
 #define TRUE 1

gcc/config/pa/xm-papro.h

@@ -19,8 +19,6 @@ along with GNU CC; see the file COPYING.  If not, write to
 the Free Software Foundation, 59 Temple Place - Suite 330,
 Boston, MA 02111-1307, USA.  */
 
-extern int errno;
-
 /* #defines that need visibility everywhere.  */
 #define FALSE 0
 #define TRUE 1