[libc] remove RT_USING_LIBC

7 files changed, 19 insertions, 21 deletions

diff --git a/components/cplusplus/Kconfig b/components/cplusplus/Kconfig
index 42b5cf9556..3d5757fe42 100644
--- a/components/cplusplus/Kconfig
+++ b/components/cplusplus/Kconfig
@@ -9,8 +9,8 @@ if RT_USING_CPLUSPLUS
     config RT_USING_CPLUSPLUS11
         bool "Enable c++11 threading feature support"
         default n
-        select RT_USING_LIBC
-        select RT_LIBC_USING_FILEIO
+        select RT_USING_POSIX_FS
+        select RT_USING_POSIX_DEVIO
         select RT_USING_PTHREADS
         select RT_USING_RTC
 
diff --git a/components/cplusplus/README.md b/components/cplusplus/README.md
index d02048d1f1..46c8c78a69 100644
--- a/components/cplusplus/README.md
+++ b/components/cplusplus/README.md
@@ -11,8 +11,6 @@ Because RT-Thread RTOS is used in embedded system mostly, there are some rules f
 4. Static class variables are discouraged. The time and place to call their constructor function could not be precisely controlled and make multi-threaded programming a nightmare.
 5. Multiple inheritance is strongly discouraged, as it can cause intolerable confusion.
 
-*NOTE*: The libc (RT_USING_LIBC in rtconfig.h) must be enable.
-
 About GNU GCC compiler
 
 please add following string in your ld link script:
diff --git a/components/cplusplus/cpp11/armclang/thread.cpp b/components/cplusplus/cpp11/armclang/thread.cpp
index 6b38d9b3a7..e10ffb9cfe 100644
--- a/components/cplusplus/cpp11/armclang/thread.cpp
+++ b/components/cplusplus/cpp11/armclang/thread.cpp
@@ -95,8 +95,8 @@ extern "C" unsigned __ARM_TPL_thread_hw_concurrency()
 extern "C" int __ARM_TPL_tls_create(__ARM_TPL_tls_key *__key,
                                     void (*__at_exit)(void *))
 {
-    pthread_key_t key; 
-    
+    pthread_key_t key;
+
     if (pthread_key_create(&key, __at_exit) == 0)
     {
         *__key = key;
diff --git a/components/cplusplus/cpp11/gcc/mutex b/components/cplusplus/cpp11/gcc/mutex
index cc593cc139..3fdf86632b 100644
--- a/components/cplusplus/cpp11/gcc/mutex
+++ b/components/cplusplus/cpp11/gcc/mutex
@@ -4,7 +4,7 @@
 #error "C++ version lower than C++11"
 #endif
 
-//#if defined(RT_USING_LIBC) && defined(RT_USING_PTHREADS)
+//#if defined(RT_USING_PTHREADS)
 
 #include <pthread.h>
 
@@ -509,4 +509,4 @@ namespace std
     }
 }
 
-//#endif // (RT_USING_LIBC) && (RT_USING_PTHREADS)
\ No newline at end of file
+//#endif //(RT_USING_PTHREADS)
\ No newline at end of file
diff --git a/components/cplusplus/cpp11/gcc/mutex.cpp b/components/cplusplus/cpp11/gcc/mutex.cpp
index 014460ffde..e11f6d8990 100644
--- a/components/cplusplus/cpp11/gcc/mutex.cpp
+++ b/components/cplusplus/cpp11/gcc/mutex.cpp
@@ -34,7 +34,7 @@ namespace std
         get_once_functor_lock_ptr() = m_ptr;
     }
 
-    extern "C"  
+    extern "C"
     {
         void once_proxy()
         {
@@ -42,7 +42,7 @@ namespace std
             function<void()> once_call = std::move(once_functor);
 
             // no need to hold the lock anymore
-            unique_lock<mutex>* lock_ptr = get_once_functor_lock_ptr();            
+            unique_lock<mutex>* lock_ptr = get_once_functor_lock_ptr();
             get_once_functor_lock_ptr() = nullptr;
             lock_ptr->unlock();
 
diff --git a/components/cplusplus/cpp11/gcc/thread b/components/cplusplus/cpp11/gcc/thread
index 5b64decd6a..60e3ec964c 100644
--- a/components/cplusplus/cpp11/gcc/thread
+++ b/components/cplusplus/cpp11/gcc/thread
@@ -4,7 +4,7 @@
 #error "C++ version lower than C++11"
 #endif
 
-//#if defined(RT_USING_LIBC) && defined(RT_USING_PTHREADS)
+//#if defined(RT_USING_PTHREADS)
 
 #include <unistd.h>
 #include <pthread.h>
diff --git a/components/cplusplus/cpp11/gcc/thread.cpp b/components/cplusplus/cpp11/gcc/thread.cpp
index 947170da25..3979da0dc4 100644
--- a/components/cplusplus/cpp11/gcc/thread.cpp
+++ b/components/cplusplus/cpp11/gcc/thread.cpp
@@ -35,17 +35,17 @@ namespace std
     {
         auto raw_ptr = b.get();
         // transfer the ownership of the invoker to the new thread
-        raw_ptr->this_ptr = std::move(b); 
+        raw_ptr->this_ptr = std::move(b);
         int err = pthread_create(&_m_thr.__cpp_thread_t, NULL,
                 &execute_native_thread_routine, raw_ptr);
 
-        if (err) 
+        if (err)
         {
             raw_ptr->this_ptr.reset();
             throw_system_error(err, "Failed to create a thread");
         }
-        
-    }    
+
+    }
 
     thread::~thread()
     {
@@ -59,12 +59,12 @@ namespace std
 
         if (joinable())
             err = pthread_join(native_handle(), NULL);
-        
-        if (err) 
+
+        if (err)
         {
             throw_system_error(err, "thread::join failed");
         }
-    
+
         _m_thr = id();
     }
 
@@ -78,14 +78,14 @@ namespace std
         {
             throw_system_error(err, "thread::detach failed");
         }
-    
+
         _m_thr = id();
     }
 
     // TODO: not yet actually implemented.
     // The standard states that the returned value should only be considered a hint.
-    unsigned thread::hardware_concurrency() noexcept 
-    {   
+    unsigned thread::hardware_concurrency() noexcept
+    {
         int __n = _RT_NPROCS;
         if (__n < 0)
             __n = 0;