diff --git a/cfg/std.cfg b/cfg/std.cfg
index 5b7d4d415..cbcf3d425 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -13,5 +13,32 @@
     <dealloc>fclose</dealloc>
     <alloc init="false">fopen</alloc>
   </resource>
+
+  <function name="fopen">   <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="fclose">  <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="fflush">  <noreturn>false</noreturn> <leak-ignore/> </function>
+
+  <function name="isalha">  <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="isalnum"> <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="isdigit"> <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="isxdigit"> <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="islower"> <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="isupper"> <noreturn>false</noreturn> <leak-ignore/> </function>
+
+  <function name="memchr">  <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="memcpy">  <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="memmove"> <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="memset">  <noreturn>false</noreturn> <leak-ignore/> </function>
+
+  <function name="strcat">  <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="strchr">  <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="strcpy">  <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="strcmp">  <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="strdup">  <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="strlen">  <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="strncat"> <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="strncpy"> <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="strncmp"> <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="strstr">  <noreturn>false</noreturn> <leak-ignore/> </function>
 </def>