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-rw-r--r--include/features.h3
-rw-r--r--include/stdio.h2
-rw-r--r--include/wchar.h2
3 files changed, 6 insertions, 1 deletions
diff --git a/include/features.h b/include/features.h
index 7f99741a95..18f743cb75 100644
--- a/include/features.h
+++ b/include/features.h
@@ -341,7 +341,8 @@
 
 /* Decide whether we can define 'extern inline' functions in headers.  */
 #if __GNUC_PREREQ (2, 7) && defined __OPTIMIZE__ \
-    && !defined __OPTIMIZE_SIZE__ && !defined __NO_INLINE__
+    && !defined __OPTIMIZE_SIZE__ && !defined __NO_INLINE__ \
+    && defined __extern_inline
 # define __USE_EXTERN_INLINES	1
 #endif
 
diff --git a/include/stdio.h b/include/stdio.h
index 748523d4d1..84b8af9da1 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -27,6 +27,7 @@ extern int __vsscanf (__const char *__restrict __s,
 		      _G_va_list __arg)
      __attribute__ ((__format__ (__scanf__, 2, 0)));
 
+#ifndef __cplusplus
 extern int __sprintf_chk (char *, int, size_t, const char *, ...) __THROW;
 extern int __snprintf_chk (char *, size_t, int, size_t, const char *, ...)
      __THROW;
@@ -40,6 +41,7 @@ extern int __vprintf_chk (int, const char *, _G_va_list);
 extern int __vfprintf_chk (FILE *, int, const char *, _G_va_list);
 extern char *__fgets_unlocked_chk (char *buf, size_t size, int n, FILE *fp);
 extern char *__fgets_chk (char *buf, size_t size, int n, FILE *fp);
+#endif
 
 /* Prototypes for compatibility functions.  */
 extern FILE *__new_tmpfile (void);
diff --git a/include/wchar.h b/include/wchar.h
index b5f74da0f0..7651f6de29 100644
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -152,6 +152,7 @@ extern int __vfwprintf (__FILE *__restrict __s,
 			__const wchar_t *__restrict __format,
 			__gnuc_va_list __arg)
      /* __attribute__ ((__format__ (__wprintf__, 2, 0))) */;
+#ifndef __cplusplus
 extern int __vfwprintf_chk (FILE *__restrict __s, int __flag,
 			    const wchar_t *__restrict __format,
 			    __gnuc_va_list __arg)
@@ -163,6 +164,7 @@ extern int __vswprintf_chk (wchar_t *__restrict __s, size_t __n,
      /* __attribute__ ((__format__ (__wprintf__, 5, 0))) */;
 libc_hidden_proto (__vfwprintf_chk)
 libc_hidden_proto (__vswprintf_chk)
+#endif
 
 /* Internal functions.  */
 extern size_t __mbsrtowcs_l (wchar_t *dst, const char **src, size_t len,