system.h (string, algorithm): Include only conditionally.

	* system.h (string, algorithm): Include only conditionally.
	(new): Include always under C++.
	* bb-reorder.c (toplevel): Define INCLUDE_ALGORITHM.
	* final.c (toplevel): Ditto.
	* ipa-chkp.c (toplevel): Define INCLUDE_STRING.
	* genconditions.c (write_header): Make gencondmd.c define
	INCLUDE_STRING.
	* mem-stats.h (mem_usage::print_dash_line): Don't use std::string.

	* config/aarch64/aarch64.c (toplevel): Define INCLUDE_STRING.
	* common/config/aarch64/aarch64-common.c (toplevel): Ditto.

From-SVN: r232736

gcc/ChangeLog

+2016-01-22  Michael Matz  <matz@suse.de>
+
+	* system.h (string, algorithm): Include only conditionally.
+	(new): Include always under C++.
+	* bb-reorder.c (toplevel): Define INCLUDE_ALGORITHM.
+	* final.c (toplevel): Ditto.
+	* ipa-chkp.c (toplevel): Define INCLUDE_STRING.
+	* genconditions.c (write_header): Make gencondmd.c define
+	INCLUDE_STRING.
+	* mem-stats.h (mem_usage::print_dash_line): Don't use std::string.
+
+	* config/aarch64/aarch64.c (toplevel): Define INCLUDE_STRING.
+	* common/config/aarch64/aarch64-common.c (toplevel): Ditto.
+
 2016-01-22  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
 
 	* gcc.target/powerpc/pr63354.c: Restrict to Linux targets with

gcc/bb-reorder.c

@@ -91,6 +91,7 @@
 */
 
 #include "config.h"
+#define INCLUDE_ALGORITHM /* stable_sort */
 #include "system.h"
 #include "coretypes.h"
 #include "backend.h"

gcc/common/config/aarch64/aarch64-common.c

@@ -19,6 +19,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include "config.h"
+#define INCLUDE_STRING
 #include "system.h"
 #include "coretypes.h"
 #include "tm.h"

gcc/config/aarch64/aarch64.c

@@ -19,6 +19,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include "config.h"
+#define INCLUDE_STRING
 #include "system.h"
 #include "coretypes.h"
 #include "backend.h"

gcc/final.c

@@ -43,6 +43,7 @@ along with GCC; see the file COPYING3.  If not see
    function_epilogue.  Those instructions never exist as rtl.  */
 
 #include "config.h"
+#define INCLUDE_ALGORITHM /* reverse */
 #include "system.h"
 #include "coretypes.h"
 #include "backend.h"

gcc/genconditions.c

@@ -51,6 +51,7 @@ write_header (void)
    machine description file.  */\n\
 \n\
 #include \"bconfig.h\"\n\
+#define INCLUDE_STRING\n\
 #include \"system.h\"\n\
 \n\
 /* It is necessary, but not entirely safe, to include the headers below\n\

gcc/ipa-chkp.c

@@ -19,6 +19,7 @@ along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
 #include "config.h"
+#define INCLUDE_STRING
 #include "system.h"
 #include "coretypes.h"
 #include "backend.h"

gcc/mem-stats.h

@@ -200,7 +200,9 @@ struct mem_usage
   static inline void
   print_dash_line (size_t count = 140)
   {
-    fprintf (stderr, "%s\n", std::string (count, '-').c_str ());
+    while (count--)
+      fputc ('-', stderr);
+    fputc ('\n', stderr);
   }
 
   /* Dump header with NAME.  */

gcc/system.h

@@ -198,8 +198,10 @@ extern int fprintf_unlocked (FILE *, const char *, ...);
    the ctype macros through safe-ctype.h */
 
 #ifdef __cplusplus
+#ifdef INCLUDE_STRING
 # include <string>
 #endif
+#endif
 
 /* There are an extraordinary number of issues with <ctype.h>.
    The last straw is that it varies with the locale.  Use libiberty's
@@ -215,8 +217,11 @@ extern int errno;
 #endif
 
 #ifdef __cplusplus
+#ifdef INCLUDE_ALGORITHM
 # include <algorithm>
+#endif
 # include <cstring>
+# include <new>
 # include <utility>
 #endif