configure.in: Find declaration for sbrk.

        * configure.in: Find declaration for sbrk.
        * acconfig.h (NEED_DECLARATION_SBRK): New tag.
        * config.in, configure: Rebuild.
        * mips-tfile.c: Properly protect declaration of sbrk and free.
        * toplev.c: Properly protect declaration of sbrk.

From-SVN: r17417

gcc/ChangeLog

+Mon Jan 19 09:38:18 1998  Richard Henderson  <rth@cygnus.com>
+
+	* configure.in: Find declaration for sbrk.
+	* acconfig.h (NEED_DECLARATION_SBRK): New tag.
+	* config.in, configure: Rebuild.
+	* mips-tfile.c: Properly protect declaration of sbrk and free.
+	* toplev.c: Properly protect declaration of sbrk.
+
 Sun Jan 18 20:18:01 1998  Richard Henderson  <rth@cygnus.com>
 
 	* alpha.c (alpha_handle_trap_shadows): Ignore CLOBBERs.

gcc/acconfig.h

@@ -13,10 +13,10 @@
 /* Whether free must be declared even if <stdlib.h> is included.  */
 #undef NEED_DECLARATION_FREE
 
-/* Whether index must be declared even if <stdlib.h> is included.  */
+/* Whether index must be declared even if <string.h> is included.  */
 #undef NEED_DECLARATION_INDEX
 
-/* Whether rindex must be declared even if <stdlib.h> is included.  */
+/* Whether rindex must be declared even if <string.h> is included.  */
 #undef NEED_DECLARATION_RINDEX
 
 /* Whether getenv must be declared even if <stdlib.h> is included.  */
@@ -24,4 +24,7 @@
 
 /* Whether atol must be declared even if <stdlib.h> is included.  */
 #undef NEED_DECLARATION_ATOL
+
+/* Whether sbrk must be declared even if <unistd.h> is included.  */
+#undef NEED_DECLARATION_SBRK
 @TOP@

gcc/config.in

@@ -14,10 +14,10 @@
 /* Whether free must be declared even if <stdlib.h> is included.  */
 #undef NEED_DECLARATION_FREE
 
-/* Whether index must be declared even if <stdlib.h> is included.  */
+/* Whether index must be declared even if <string.h> is included.  */
 #undef NEED_DECLARATION_INDEX
 
-/* Whether rindex must be declared even if <stdlib.h> is included.  */
+/* Whether rindex must be declared even if <string.h> is included.  */
 #undef NEED_DECLARATION_RINDEX
 
 /* Whether getenv must be declared even if <stdlib.h> is included.  */
@@ -26,6 +26,9 @@
 /* Whether atol must be declared even if <stdlib.h> is included.  */
 #undef NEED_DECLARATION_ATOL
 
+/* Whether sbrk must be declared even if <unistd.h> is included.  */
+#undef NEED_DECLARATION_SBRK
+
 /* Define if you have the ANSI C header files.  */
 #undef STDC_HEADERS
 

gcc/configure.in

@@ -186,6 +186,7 @@ GCC_NEED_DECLARATION(free)
 GCC_NEED_DECLARATION(index)
 GCC_NEED_DECLARATION(rindex)
 GCC_NEED_DECLARATION(getenv)
+GCC_NEED_DECLARATION(sbrk)
 
 AC_DECL_SYS_SIGLIST
 

gcc/mips-tfile.c

@@ -1755,8 +1755,10 @@ STATIC void	  free_thead		__proto((thead_t *));
 STATIC char	 *local_index		__proto((const char *, int));
 STATIC char	 *local_rindex		__proto((const char *, int));
 
-#ifndef __alpha
+#ifdef NEED_DECLARATION_SBRK
 extern char  *sbrk			__proto((int));
+#endif
+#ifdef NEED_DECLARATION_FREE
 extern void   free			__proto((PTR_T));
 #endif
 extern char  *mktemp			__proto((char *));

gcc/toplev.c

@@ -39,6 +39,9 @@ Boston, MA 02111-1307, USA.  */
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
 #endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
 
 #undef FLOAT /* This is for hpux. They should change hpux.  */
 #undef FFS  /* Some systems define this in param.h.  */
@@ -190,7 +193,7 @@ void print_switch_values ();
 /* Length of line when printing switch values.  */
 #define MAX_LINE 75
 
-#ifdef __alpha
+#ifdef NEED_DECLARATION_SBRK
 extern char *sbrk ();
 #endif