Libc is now written in C++

libc/include/stdio.h

@@ -4,14 +4,10 @@
 
 #define EOF (-1)
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+__BEGIN_DECLS
 
 int printf(const char* __restrict, ...);
 int putchar(int);
 int puts(const char*);
 
-#ifdef __cplusplus
-}
-#endif
+__END_DECLS

libc/include/stdlib.h

@@ -2,13 +2,9 @@
 
 #include <sys/cdefs.h>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+__BEGIN_DECLS
 
 __attribute__((__noreturn__))
 void abort(void);
 
-#ifdef __cplusplus
-}
-#endif
+__END_DECLS

libc/include/string.h

@@ -3,9 +3,7 @@
 #include <stddef.h>
 #include <sys/cdefs.h>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+__BEGIN_DECLS
 
 int memcmp(const void*, const void*, size_t);
 void* memcpy(void* __restrict, const void* __restrict, size_t);
@@ -16,6 +14,4 @@ size_t strlen(const char*);
 char* strcpy(char* __restrict, const char* __restrict);
 char* strncpy(char* __restrict, const char* __restrict, size_t);
 
-#ifdef __cplusplus
-}
-#endif
+__END_DECLS

libc/include/sys/cdefs.h

@@ -1,3 +1,11 @@
 #pragma once
 
-#define __banan_libc 1
+#define __banan_libc 1
+
+#ifdef __cplusplus
+#define __BEGIN_DECLS extern "C" {
+#define __END_DECLS }
+#else
+#define __BEGIN_DECLS
+#define __END_DECLS
+#endif