diff --git a/components/libc/compilers/armlibc/libc.h b/components/libc/compilers/armlibc/libc.h
index 158fe06c3e..38d72241d5 100644
--- a/components/libc/compilers/armlibc/libc.h
+++ b/components/libc/compilers/armlibc/libc.h
@@ -12,11 +12,17 @@
 
 #include <stddef.h>
 
-int libc_system_init(void);
+#ifdef __cplusplus
+extern "C" {
+#endif
+    int libc_system_init(void);
 
-int libc_stdio_set_console(const char* device_name, int mode);
-int libc_stdio_get_console(void);
-int libc_stdio_read (void *buffer, size_t size);
-int libc_stdio_write(const void *buffer, size_t size);
+    int libc_stdio_set_console(const char* device_name, int mode);
+    int libc_stdio_get_console(void);
+    int libc_stdio_read(void* buffer, size_t size);
+    int libc_stdio_write(const void* buffer, size_t size);
+#ifdef __cplusplus
+}
+#endif
 
 #endif
diff --git a/components/libc/compilers/dlib/libc.h b/components/libc/compilers/dlib/libc.h
index 7b2665c32b..a3a5753c77 100644
--- a/components/libc/compilers/dlib/libc.h
+++ b/components/libc/compilers/dlib/libc.h
@@ -13,11 +13,17 @@
 
 #include <stddef.h>
 
-int libc_system_init(void);
+#ifdef __cplusplus
+extern "C" {
+#endif
+    int libc_system_init(void);
 
-int libc_stdio_set_console(const char* device_name, int mode);
-int libc_stdio_get_console(void);
-int libc_stdio_read (void *buffer, size_t size);
-int libc_stdio_write(const void *buffer, size_t size);
+    int libc_stdio_set_console(const char* device_name, int mode);
+    int libc_stdio_get_console(void);
+    int libc_stdio_read(void* buffer, size_t size);
+    int libc_stdio_write(const void* buffer, size_t size);
+#ifdef __cplusplus
+}
+#endif
 
 #endif
diff --git a/components/libc/compilers/newlib/libc.h b/components/libc/compilers/newlib/libc.h
index ab9334fe26..e2613740b9 100644
--- a/components/libc/compilers/newlib/libc.h
+++ b/components/libc/compilers/newlib/libc.h
@@ -27,13 +27,19 @@
 #define MICROSECOND_PER_TICK    (MICROSECOND_PER_SECOND / RT_TICK_PER_SECOND)
 #define NANOSECOND_PER_TICK     (NANOSECOND_PER_SECOND  / RT_TICK_PER_SECOND)
 
-int libc_system_init(void);
-int libc_stdio_set_console(const char* device_name, int mode);
-int libc_stdio_get_console(void);
+#ifdef __cplusplus
+extern "C" {
+#endif
+    int libc_system_init(void);
+    int libc_stdio_set_console(const char* device_name, int mode);
+    int libc_stdio_get_console(void);
 
-/* some time related function */
-int libc_set_time(const struct timespec *time);
-int libc_get_time(struct timespec *time);
-int libc_time_to_tick(const struct timespec *time);
+    /* some time related function */
+    int libc_set_time(const struct timespec* time);
+    int libc_get_time(struct timespec* time);
+    int libc_time_to_tick(const struct timespec* time);
+#ifdef __cplusplus
+}
+#endif
 
 #endif