diff --git a/cfg/std.cfg b/cfg/std.cfg
index 2757dae77..cbd6bd72f 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -1668,9 +1668,20 @@
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
+      <not-uninit/>
       <valid>0:255</valid>
     </arg>
   </function>
+  <!-- int iswalnum ( wint_t c ); -->
+  <function name="iswalnum">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- int isalpha ( int c ); -->
   <function name="isalpha">
     <use-retval/>
@@ -1678,9 +1689,20 @@
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
+      <not-uninit/>
       <valid>0:255</valid>
     </arg>
   </function>
+  <!-- int iswalpha (wint_t c);-->
+  <function name="iswalpha">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- int isblank ( int c ); -->
   <function name="isblank">
     <use-retval/>
@@ -1688,9 +1710,20 @@
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
+      <not-uninit/>
       <valid>0:255</valid>
     </arg>
   </function>
+  <!-- int iswblank (wint_t c); -->
+  <function name="iswblank">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- int iscntrl ( int c ); -->
   <function name="iscntrl">
     <use-retval/>
@@ -1698,9 +1731,33 @@
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
+      <not-uninit/>
       <valid>0:255</valid>
     </arg>
   </function>
+  <!-- int iswcntrl (wint_t c); -->
+  <function name="iswcntrl">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- int iswctype(wint_t c, wctype_t desc); -->
+  <function name="iswctype">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+    <arg nr="2">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- int isdigit ( int c ); -->
   <function name="isdigit">
     <use-retval/>
@@ -1708,9 +1765,20 @@
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
+      <not-uninit/>
       <valid>0:255</valid>
     </arg>
   </function>
+  <!-- int iswdigit (wint_t c); -->
+  <function name="iswdigit">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- int isgraph ( int c ); -->
   <function name="isgraph">
     <use-retval/>
@@ -1718,9 +1786,20 @@
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
+      <not-uninit/>
       <valid>0:255</valid>
     </arg>
   </function>
+  <!-- int iswgraph (wint_t c); -->
+  <function name="iswgraph">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- int islower ( int c ); -->
   <function name="islower">
     <use-retval/>
@@ -1728,9 +1807,20 @@
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
+      <not-uninit/>
       <valid>0:255</valid>
     </arg>
   </function>
+  <!-- int iswlower (wint_t c); -->
+  <function name="iswlower">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- int isprint ( int c ); -->
   <function name="isprint">
     <use-retval/>
@@ -1738,9 +1828,20 @@
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
+      <not-uninit/>
       <valid>0:255</valid>
     </arg>
   </function>
+  <!-- int iswprint (wint_t c); -->
+  <function name="iswprint">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- int ispunct ( int c ); -->
   <function name="ispunct">
     <use-retval/>
@@ -1748,9 +1849,20 @@
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
+      <not-uninit/>
       <valid>0:255</valid>
     </arg>
   </function>
+  <!-- int iswpunct (wint_t c); -->
+  <function name="iswpunct">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- int isspace ( int c ); -->
   <function name="isspace">
     <use-retval/>
@@ -1758,9 +1870,20 @@
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
+      <not-uninit/>
       <valid>0:255</valid>
     </arg>
   </function>
+  <!-- int iswspace (wint_t c); -->
+  <function name="iswspace">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- int isupper ( int c ); -->
   <function name="isupper">
     <use-retval/>
@@ -1768,9 +1891,20 @@
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
+      <not-uninit/>
       <valid>0:255</valid>
     </arg>
   </function>
+  <!-- int iswupper (wint_t c); -->
+  <function name="iswupper">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- int isxdigit ( int c ); -->
   <function name="isxdigit">
     <use-retval/>
@@ -1778,9 +1912,75 @@
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
+      <not-uninit/>
       <valid>0:255</valid>
     </arg>
   </function>
+  <!-- int iswxdigit (wint_t c); -->
+  <function name="iswxdigit">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- wint_t towctrans(wint_t c, wctrans_t desc); -->
+  <function name="towctrans">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+    <arg nr="2">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- wint_t towlower ( wint_t c ); -->
+  <function name="towlower">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- wint_t towupper (wint_t c); -->
+  <function name="towupper">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- wctrans_t wctrans (const char* property); -->
+  <function name="wctrans">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-null/>
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- wctype_t wctype (const char* property); -->
+  <function name="wctype">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-null/>
+      <not-uninit/>
+    </arg>
+  </function>
   <function name="labs">
     <use-retval/>
     <pure/>