From 3a724ca78cc33face77acdfa0d054cce46441e81 Mon Sep 17 00:00:00 2001
From: Dong Heng <dongheng@espressif.com>
Date: Tue, 8 May 2018 16:02:57 +0800
Subject: [PATCH] feat(kconfig): Add option to kconfig

Add option to enable reent function.
---
 components/freertos/Kconfig                   | 12 ++++++
 .../include/port/freertos/FreeRTOSConfig.h    |  6 +++
 components/newlib/Kconfig                     | 41 +++++++++++++++++++
 3 files changed, 59 insertions(+)
 create mode 100644 components/freertos/Kconfig
 create mode 100644 components/newlib/Kconfig

diff --git a/components/freertos/Kconfig b/components/freertos/Kconfig
new file mode 100644
index 00000000..b50d1871
--- /dev/null
+++ b/components/freertos/Kconfig
@@ -0,0 +1,12 @@
+menu "FreeRTOS"
+
+config FREERTOS_ENABLE_REENT
+    bool "Enable \"reent\" function"
+    default n
+    select NEWLIB_ENABLE
+    help
+        Enable "reent" function and FreeRTOS should use "reent" function of newlib.
+
+        The configuration will enable newlib.
+
+endmenu
diff --git a/components/freertos/include/port/freertos/FreeRTOSConfig.h b/components/freertos/include/port/freertos/FreeRTOSConfig.h
index 89deb9a3..93d005b6 100644
--- a/components/freertos/include/port/freertos/FreeRTOSConfig.h
+++ b/components/freertos/include/port/freertos/FreeRTOSConfig.h
@@ -65,6 +65,8 @@
 #ifndef FREERTOS_CONFIG_H
 #define FREERTOS_CONFIG_H
 
+#include "sdkconfig.h"
+
 /*-----------------------------------------------------------
  * Application specific definitions.
  *
@@ -140,5 +142,9 @@ configKERNEL_INTERRUPT_PRIORITY setting.  Here 15 corresponds to the lowest
 NVIC value of 255. */
 #define configLIBRARY_KERNEL_INTERRUPT_PRIORITY	15
 
+#ifdef CONFIG_FREERTOS_ENABLE_REENT
+#define configUSE_NEWLIB_REENTRANT  1
+#endif
+
 #endif /* FREERTOS_CONFIG_H */
 
diff --git a/components/newlib/Kconfig b/components/newlib/Kconfig
new file mode 100644
index 00000000..527130f4
--- /dev/null
+++ b/components/newlib/Kconfig
@@ -0,0 +1,41 @@
+menu "Newlib"
+
+config NEWLIB_ENABLE
+    bool "Enable newlib"
+    default y
+    help
+        If you need use you own C library, make this option disable. The libraries and
+        header files at this component will not be used.
+
+        Note: ABI of the C library of your own must be same as SDK.
+
+choice NEWLIB_LIBRARY_LEVEL
+    prompt "newlib level"
+    default NEWLIB_LIBRARY_LEVEL_NANO
+    depends on NEWLIB_ENABLE
+    help
+        Choose newlib library level.
+
+config NEWLIB_LIBRARY_LEVEL_NORMAL
+    bool "normal"
+    help
+        If you need 64-bit integer formatting support or C99 features, select this
+        option.
+
+config NEWLIB_LIBRARY_LEVEL_NANO
+    bool "nano"
+    help
+        The newlib library which has been compiled with so-called "nano"
+        formatting option. This option doesn't support 64-bit integer formats and C99
+        features, such as positional arguments.
+
+        For more details about "nano" formatting option, please see newlib readme file,
+        search for '--enable-newlib-nano-formatted-io':
+        https://sourceware.org/newlib/README
+
+        If you do not need 64-bit integer formatting support or C99 features, select this
+        option.
+
+endchoice
+
+endmenu