From c111ec176c3f3a3b48cd3c9f10562d63d7c6fef4 Mon Sep 17 00:00:00 2001
From: Ulrich Mohr <mohr@irs.uni-stuttgart.de>
Date: Fri, 14 Nov 2025 17:27:56 +0100
Subject: [PATCH] debian seems to have a newlib without reent :(

---
 bsp_z7/hardware/interfaces.c |  6 +++---
 bsp_z7/newlib/read.c         | 14 +++++++-------
 bsp_z7/newlib/write.c        | 12 ++++++------
 3 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/bsp_z7/hardware/interfaces.c b/bsp_z7/hardware/interfaces.c
index 8293038..682576c 100644
--- a/bsp_z7/hardware/interfaces.c
+++ b/bsp_z7/hardware/interfaces.c
@@ -39,7 +39,7 @@ int hw_device_open(const char *path, size_t path_len) {
     return UART_1;
   }
 
-  _REENT_ERRNO(_REENT) = ENOENT;
+//  _REENT_ERRNO(_REENT) = ENOENT;
   return -1;
 }
 
@@ -70,7 +70,7 @@ int hw_interface_write(int fd, const char *ptr, size_t len) {
     uart_send(XPS_UART1_BASEADDR, ptr, len);
     return len;
   }
-  _REENT_ERRNO(_REENT) = EBADF;
+//  _REENT_ERRNO(_REENT) = EBADF;
   return -1;
 }
 
@@ -83,4 +83,4 @@ int hw_interface_read(int fd, char *ptr, size_t len) {
     return uart1_read(ptr,len);;
   }
   return -1;
-}
\ No newline at end of file
+}
diff --git a/bsp_z7/newlib/read.c b/bsp_z7/newlib/read.c
index 4cd4631..1c0db7e 100644
--- a/bsp_z7/newlib/read.c
+++ b/bsp_z7/newlib/read.c
@@ -10,19 +10,19 @@
 
 int read(int fd, void *ptr, size_t len) {
   if (ptr == NULL) {
-    _REENT_ERRNO(_REENT) = EINVAL;
+//    _REENT_ERRNO(_REENT) = EINVAL;
     return -1;
   }
 
   // 0 is stdin, TODO: do we support it?
   if (fd < 1) {
-    _REENT_ERRNO(_REENT) = EBADF;
+//    _REENT_ERRNO(_REENT) = EBADF;
     return -1;
   }
 
   // stdout and stderr
   if (fd < 3) {
-    _REENT_ERRNO(_REENT) = EBADF;
+//    _REENT_ERRNO(_REENT) = EBADF;
     return -1;
   }
 
@@ -30,13 +30,13 @@ int read(int fd, void *ptr, size_t len) {
     int result = hw_interface_read(fd, ptr, len);
     if (result >= 0) {
       return result;
-    } else if (_REENT_ERRNO(_REENT) != EBADF) {
-      return result;
+//    } else if (_REENT_ERRNO(_REENT) != EBADF) {
+//      return result;
     }
     // continue if fd did not match to try other fd providers
   }
 
   // we do not have dynamic fds, so fd is invalid
-  _REENT_ERRNO(_REENT) = EBADF;
+//  _REENT_ERRNO(_REENT) = EBADF;
   return -1;
-}
\ No newline at end of file
+}
diff --git a/bsp_z7/newlib/write.c b/bsp_z7/newlib/write.c
index 6e397d4..063c413 100644
--- a/bsp_z7/newlib/write.c
+++ b/bsp_z7/newlib/write.c
@@ -10,14 +10,14 @@
 
 int write(int fd, const void *ptr, size_t len) {
   if (ptr == NULL) {
-    _REENT_ERRNO(_REENT) = EINVAL;
+//    _REENT_ERRNO(_REENT) = EINVAL;
     return -1;
   }
   //TODO check len
   
   // 0 is stdin, do not write to it
   if (fd < 1) {
-    _REENT_ERRNO(_REENT) = EBADF;
+//    _REENT_ERRNO(_REENT) = EBADF;
     return -1;
   }
   // we only support a single debug UART, so
@@ -38,13 +38,13 @@ int write(int fd, const void *ptr, size_t len) {
     int result = hw_interface_write(fd, ptr, len);
     if (result >= 0) {
       return result;
-    } else if (_REENT_ERRNO(_REENT) != EBADF) {
-      return result;
+//    } else if (_REENT_ERRNO(_REENT) != EBADF) {
+//      return result;
     }
     // continue if fd did not match to try other fd providers
   }
 
   // we do not have dynamic fds, so fd is invalid
-  _REENT_ERRNO(_REENT) = EBADF;
+//  _REENT_ERRNO(_REENT) = EBADF;
     return -1;
-}
\ No newline at end of file
+}