xm-mot3300.h (alloca): Properly declare if __STDC__.

        * m68k/xm-mot3300.h (alloca): Properly declare if __STDC__.
        * mips/mips.h (alloca): Likewise.
        * rs6000/xm-rs6000.h (alloca): Likewise.
        * rs6000/xm-sysv4.h: Likewise.
Fixes build problem when using an ANSI compiler that isn't gcc.

From-SVN: r15557

gcc/ChangeLog

+Thu Sep 18 21:13:40 1997  Jeffrey A Law  (law@cygnus.com)
+
+	* m68k/xm-mot3300.h (alloca): Properly declare if __STDC__.
+	* mips/mips.h (alloca): Likewise.
+	* rs6000/xm-rs6000.h (alloca): Likewise.
+	* rs6000/xm-sysv4.h: Likewise.
+
 Thu Sep 18 14:22:22 1997  Jason Merrill  <jason@yorick.cygnus.com>
 
 	* final.c (final_scan_insn): Hand BARRIERs off to the dwarf2 code.

gcc/config/m68k/xm-mot3300.h

@@ -36,8 +36,12 @@ Boston, MA 02111-1307, USA.  */
 /* do not use alloca from -lPW with cc, because function epilogues use %sp */
 #ifndef __GNUC__
 #define USE_C_ALLOCA
+#ifdef __STDC__
+extern void *alloca ();
+#else
 extern char *alloca ();
 #endif
+#endif
 
 /* Override part of the obstack macros.  */
 

gcc/config/rs6000/xm-rs6000.h

@@ -44,6 +44,9 @@ Boston, MA 02111-1307, USA.  */
 /* If not compiled with GNU C, use the C alloca and use only int bitfields.  */
 #ifndef __GNUC__
 #define USE_C_ALLOCA
+#if __STDC__
+extern void *alloca ();
+#else
 extern char *alloca ();
 #define	ONLY_INT_FIELDS
 #endif

gcc/config/rs6000/xm-sysv4.h

@@ -51,6 +51,9 @@ Boston, MA 02111-1307, USA.  */
 /* if not compiled with GNU C, use the C alloca and use only int bitfields. */
 #ifndef __GNUC__
 #define	USE_C_ALLOCA
+#ifdef __STDC__
+extern void *alloca ();
+#else
 extern char *alloca ();
 #undef ONLY_INT_FIELDS
 #define ONLY_INT_FIELDS