diff --git a/cfg/std.cfg b/cfg/std.cfg
index ad79e3042..c933da5e6 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -463,6 +463,7 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- double atanh(double x); -->
   <function name="atanh">
     <use-retval/>
     <pure/>
@@ -472,6 +473,7 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- float atanhf(float x); -->
   <function name="atanhf">
     <use-retval/>
     <pure/>
@@ -481,6 +483,7 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- long double atanhl(long double x); -->
   <function name="atanhl">
     <use-retval/>
     <pure/>
@@ -490,6 +493,7 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- double atan2(double x, double y); -->
   <function name="atan2">
     <use-retval/>
     <pure/>
@@ -502,6 +506,7 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- float atan2f(float x, float y); -->
   <function name="atan2f">
     <use-retval/>
     <pure/>
@@ -514,6 +519,7 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- long double atan2l(long double x, long double y); -->
   <function name="atan2l">
     <use-retval/>
     <pure/>
@@ -526,6 +532,7 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- int atexit(void (*func)(void)); -->
   <function name="atexit">
     <pure/>
     <noreturn>false</noreturn>
@@ -534,6 +541,7 @@
       <not-null/>
     </arg>
   </function>
+  <!-- double atof(const char *s); -->
   <function name="atof">
     <use-retval/>
     <pure/>
@@ -543,6 +551,7 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- int atoi(const char *s); -->
   <function name="atoi">
     <use-retval/>
     <pure/>
@@ -552,6 +561,7 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- long int atol(const char *s); -->
   <function name="atol">
     <use-retval/>
     <pure/>
@@ -561,6 +571,7 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- long long int atoll(const char *s); -->
   <function name="atoll">
     <use-retval/>
     <pure/>
@@ -570,6 +581,7 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- void * calloc (size_t nitems, size_t size); -->
   <function name="calloc">
     <use-retval/>
     <noreturn>false</noreturn>
@@ -810,6 +822,36 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- double carg(double complex z);-->
+  <function name="carg">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- float cargf(float complex z);-->
+  <function name="cargf">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- long double cargl(long double complex z);-->
+  <function name="cargl">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <function name="erfcf">
     <use-retval/>
     <pure/>
@@ -1560,8 +1602,10 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- wint_t btowc(int c); -->
   <function name="btowc">
     <use-retval/>
+    <pure/>
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
@@ -1998,6 +2042,96 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- double complex cabs( double complex z ); -->
+  <function name="cabs">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- float complex cabsf( float complex z ); -->
+  <function name="cabsf">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- long double complex cabsl( long double complex z ); -->
+  <function name="cabs">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- double complex cacos( double complex z ); -->
+  <function name="cacos">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- float complex cacosf( float complex z ); -->
+  <function name="cacosf">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- long double complex cacosl( long double complex z ); -->
+  <function name="cacosl">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- double complex cacosh( double complex z ); -->
+  <function name="cacos">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- float complex cacoshf( float complex z ); -->
+  <function name="cacoshf">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- long double complex cacoshl( long double complex z ); -->
+  <function name="cacoshl">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <function name="labs">
     <use-retval/>
     <pure/>
@@ -2931,6 +3065,7 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- void* bsearch (const void* key, const void* base, size_t num, size_t size, int (*compar)(const void*,const void*));-->
   <function name="bsearch">
     <use-retval/>
     <pure/>