diff --git a/contrib/sdk/sources/newlib/libc/include/sys/ksys.h b/contrib/sdk/sources/newlib/libc/include/sys/ksys.h
index 36fc2e2904..a651096d16 100644
--- a/contrib/sdk/sources/newlib/libc/include/sys/ksys.h
+++ b/contrib/sdk/sources/newlib/libc/include/sys/ksys.h
@@ -24,6 +24,10 @@
 #include <stdbool.h>
 
 #ifdef __cplusplus
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wold-style-cast"
+
 extern "C" {
 #endif
 
@@ -1075,17 +1079,21 @@ KOSAPI void _ksys_draw_line(int xs, int ys, int xe, int ye, ksys_color_t color)
 KOSAPI void _ksys_draw_number(int number, int x, int y, int len, ksys_color_t color)
 {
     unsigned fmt;
-    fmt = len << 16 | 0x80000000; // no leading zeros + width
+    fmt = (((unsigned int) len) << 16) | 0x80000000; // no leading zeros + width
     asm_inline(
         "int $0x40"
         :
-        : "a"(47), "b"(fmt), "c"(number), "d"((x << 16) | y), "S"(color));
+        : "a"(47), 
+        "b"(fmt), 
+        "c"(number), 
+        "d"((x << 16) | y), 
+        "S"(color));
 }
 
 KOSAPI void _ksys_draw_number_bg(unsigned number, int x, int y, int len, ksys_color_t color, ksys_color_t bg)
 {
     unsigned fmt;
-    fmt = len << 16 | 0x80000000; // no leading zeros + width
+    fmt = (((unsigned int) len) << 16) | 0x80000000; // no leading zeros + width
     asm_inline(
         "int $0x40"
         :
@@ -1141,7 +1149,7 @@ enum KSYS_CLIP_TYPES {
 
 KOSAPI int _ksys_clip_num(void)
 {
-    unsigned val;
+    int val;
     asm_inline(
         "int $0x40"
         : "=a"(val)
@@ -1167,7 +1175,7 @@ KOSAPI char* _ksys_clip_get(int n) // returned buffer must be freed by _ksys_fre
 
 KOSAPI int _ksys_clip_set(int n, char* buffer)
 {
-    unsigned val;
+    int val;
     asm_inline(
         "int $0x40"
         : "=a"(val)
@@ -1181,7 +1189,7 @@ KOSAPI int _ksys_clip_set(int n, char* buffer)
 
 KOSAPI int _ksys_clip_pop()
 {
-    unsigned val;
+    int val;
     asm_inline(
         "int $0x40"
         : "=a"(val)
@@ -1194,7 +1202,7 @@ KOSAPI int _ksys_clip_pop()
 
 KOSAPI int _ksys_clip_unlock()
 {
-    unsigned val;
+    int val;
     asm_inline(
         "int $0x40"
         : "=a"(val)
@@ -1554,7 +1562,7 @@ KOSAPI ksys_file_status_t _ksys_file_read(const char* name, uint64_t offset, uin
     f.data_size = size;
     f.data = buf;
     f.zero = 0;
-    f.path_ptr = (char*)name;
+    f.path_ptr = (char*) name;
     return _ksys_file(&f);
 }
 
@@ -1568,7 +1576,7 @@ KOSAPI ksys_file_status_t _ksys_file_read_dir(const char* name, uint32_t offset,
     f.data_size = blocks;
     f.data = buff;
     f.zero = 0;
-    f.path_ptr = (char*)name;
+    f.path_ptr = (char*) name;
     return _ksys_file(&f);
 }
 
@@ -1583,7 +1591,7 @@ KOSAPI ksys_file_status_t _ksys_file_create(const char* name)
     f.data_size = 0;
     f.data = NULL;
     f.zero = 0;
-    f.path_ptr = (char*)name;
+    f.path_ptr = (char*) name;
     return _ksys_file(&f);
 }
 
@@ -1596,9 +1604,9 @@ KOSAPI ksys_file_status_t _ksys_file_write(const char* name, uint64_t offset, ui
     f.func_num = KSYS_FILE_WRITE;
     f.offset64 = offset;
     f.data_size = size;
-    f.data = (void*)buf;
+    f.data = (void*) buf;
     f.zero = 0;
-    f.path_ptr = (char*)name;
+    f.path_ptr = (char*) name;
     return _ksys_file(&f);
 }
 
@@ -1612,8 +1620,8 @@ KOSAPI int _ksys_file_set_size(const char* name, uint64_t size)
     f.data_size = 0;
     f.data = NULL;
     f.zero = 0;
-    f.path_ptr = (char*)name;
-    return _ksys_file(&f).status;
+    f.path_ptr = (char*) name;
+    return (int) _ksys_file(&f).status;
 }
 
 /*========== Function 70, subfunction 5 - get information on file/folder. =====*/
@@ -1633,10 +1641,10 @@ KOSAPI int _ksys_file_info(const char* name, ksys_file_info_t* info)
     f.func_num = KSYS_FILE_GET_INFO;
     f.offset64 = 0;
     f.data_size = 0;
-    f.data = (void*)info;
+    f.data = (void*) info;
     f.zero = 0;
-    f.path_ptr = (char*)name;
-    return _ksys_file(&f).status;
+    f.path_ptr = (char*) name;
+    return (int) _ksys_file(&f).status;
 }
 
 #define _ksys_dir_info _ksys_file_info
@@ -1659,8 +1667,8 @@ KOSAPI int _ksys_exec(const char* path, char* args, bool debug)
     f.debug = debug;
     f.args = args;
     f.zero = 0;
-    f.path_ptr = (char*)path;
-    return _ksys_file(&f).status;
+    f.path_ptr = (char*) path;
+    return (int) _ksys_file(&f).status;
 }
 
 /*========== Function 70, subfunction 8 - delete file/folder. ==========*/
@@ -1673,8 +1681,8 @@ KOSAPI int _ksys_file_delete(const char* path)
     f.data_size = 0;
     f.data = NULL;
     f.zero = 0;
-    f.path_ptr = (char*)path;
-    return _ksys_file(&f).status;
+    f.path_ptr = (char*) path;
+    return (int) _ksys_file(&f).status;
 }
 
 #define _ksys_rmdir(x) _ksys_file_delete(x)
@@ -1689,8 +1697,8 @@ KOSAPI int _ksys_mkdir(const char* path)
     f.data_size = 0;
     f.data = NULL;
     f.zero = 0;
-    f.path_ptr = (char*)path;
-    return _ksys_file(&f).status;
+    f.path_ptr = (char*) path;
+    return (int) _ksys_file(&f).status;
 }
 
 /*============= Function 70, subfunction 10 - rename/move. =============*/
@@ -1699,11 +1707,11 @@ KOSAPI int _ksys_file_rename(const char* name, const char* new_name)
 {
     ksys_file_t f;
     f.func_num = KSYS_FILE_REMOVE;
-    f.data = (void*)new_name;
+    f.data = (void*) new_name;
     f.data_size = 0;
     f.zero = 0;
-    f.path_ptr = (char*)name;
-    return _ksys_file(&f).status;
+    f.path_ptr = (char*) name;
+    return (int) _ksys_file(&f).status;
 }
 
 #define _ksys_dir_rename _ksys_file_rename
@@ -1811,6 +1819,7 @@ KOSAPI int _ksys_posix_pipe2(int pipefd[2], int flags)
 
 #ifdef __cplusplus
 }
+#pragma GCC diagnostic pop
 #endif
 
 #endif // _KSYS_H_