From 6fe00cba53847664ba92f3dba9028846cd2d4ded Mon Sep 17 00:00:00 2001
From: loremmoqi <780939104@qq.com>
Date: Sat, 11 Oct 2025 15:32:47 +0800
Subject: [PATCH 1/3] Fix stdio compatibility with Newlib >= 3.4.0

---
 components/libc/posix/io/stdio/stdio.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/components/libc/posix/io/stdio/stdio.c b/components/libc/posix/io/stdio/stdio.c
index 98816c1f281..77aa660e724 100644
--- a/components/libc/posix/io/stdio/stdio.c
+++ b/components/libc/posix/io/stdio/stdio.c
@@ -104,8 +104,12 @@ int rt_posix_stdio_set_console(const char* device_name, int mode)
             _GLOBAL_REENT->_stderr = std_console;
         }
 
-#if (NEWLIB_VERSION_NUM < 30400U) || (NEWLIB_VERSION_NUM >= 40000U && NEWLIB_VERSION_NUM < 40300U)
-        _GLOBAL_REENT->__sdidinit = 1; /* __sdidinit is obselete */
+#if defined(_REENT_SMALL) || !defined(__sdidinit)
+    // Newlib >= 3.4.0 or small reent version: no __sdidinit field
+    // Do nothing
+#else
+    // Older newlib versions (typically < 3.4.0) still define __sdidinit
+    _GLOBAL_REENT->__sdidinit = 1;
 #endif
     }
 

From 443e5bacff7a580b3b189ce19e740f16e6286144 Mon Sep 17 00:00:00 2001
From: loremmoqi <780939104@qq.com>
Date: Sat, 11 Oct 2025 21:26:47 +0800
Subject: [PATCH 2/3] Standard comments are in C++ style.

---
 components/libc/posix/io/stdio/stdio.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/components/libc/posix/io/stdio/stdio.c b/components/libc/posix/io/stdio/stdio.c
index 77aa660e724..a7edf49fd22 100644
--- a/components/libc/posix/io/stdio/stdio.c
+++ b/components/libc/posix/io/stdio/stdio.c
@@ -105,10 +105,10 @@ int rt_posix_stdio_set_console(const char* device_name, int mode)
         }
 
 #if defined(_REENT_SMALL) || !defined(__sdidinit)
-    // Newlib >= 3.4.0 or small reent version: no __sdidinit field
-    // Do nothing
+    /* Newlib >= 3.4.0 or small reent version: no __sdidinit field */
+    /* Do nothing */ 
 #else
-    // Older newlib versions (typically < 3.4.0) still define __sdidinit
+    /* Older newlib versions (typically < 3.4.0) still define __sdidinit */
     _GLOBAL_REENT->__sdidinit = 1;
 #endif
     }

From bf937621b50e12cc844b4d1285e38b0b774af02a Mon Sep 17 00:00:00 2001
From: loremmoqi <780939104@qq.com>
Date: Sun, 12 Oct 2025 21:11:16 +0800
Subject: [PATCH 3/3] delete extra space at the end of this line 109

---
 components/libc/posix/io/stdio/stdio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/libc/posix/io/stdio/stdio.c b/components/libc/posix/io/stdio/stdio.c
index a7edf49fd22..06d341d722e 100644
--- a/components/libc/posix/io/stdio/stdio.c
+++ b/components/libc/posix/io/stdio/stdio.c
@@ -106,7 +106,7 @@ int rt_posix_stdio_set_console(const char* device_name, int mode)
 
 #if defined(_REENT_SMALL) || !defined(__sdidinit)
     /* Newlib >= 3.4.0 or small reent version: no __sdidinit field */
-    /* Do nothing */ 
+    /* Do nothing */
 #else
     /* Older newlib versions (typically < 3.4.0) still define __sdidinit */
     _GLOBAL_REENT->__sdidinit = 1;