diff --git a/cfg/std.cfg b/cfg/std.cfg
index f5b18884a..028f8e518 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -1,41 +1,5 @@
 <?xml version="1.0"?>
 <def format="2">
-  <!-- math.h constants-->
-  <define name="FLT_RADIX" value="2"/>
-  <define name="DECIMAL_DIG" value="21"/>
-  <define name="FLT_DECIMAL_DIG" value="9"/>
-  <define name="DBL_DECIMAL_DIG" value="17"/>
-  <define name="LDBL_DECIMAL_DIG" value="21"/>
-  <define name="FLT_MIN" value="1.175494e-38"/>
-  <define name="FLT_MAX" value="3.402823e+38"/>
-  <define name="FLT_EPSILON" value="1.192093e-07"/>
-  <define name="FLT_DIG" value="6"/>
-  <define name="FLT_MANT_DIG" value="24"/>
-  <define name="FLT_MIN_EXP" value="-125"/>
-  <define name="FLT_MIN_10_EXP" value="-37"/>
-  <define name="FLT_MAX_EXP" value="128"/>
-  <define name="FLT_MAX_10_EXP" value="38"/>
-  <define name="FLT_ROUNDS" value="1"/>
-  <define name="FLT_EVAL_METHOD" value="0"/>
-  <define name="FLT_HAS_SUBNORM" value="1"/>
-  <define name="DBL_MIN" value="2.225074e-308"/>
-  <define name="DBL_MAX" value="1.797693e+308"/>
-  <define name="DBL_EPSILON" value="2.220446e-16"/>
-  <define name="DBL_DIG" value="15"/>
-  <define name="DBL_MANT_DIG" value="53"/>
-  <define name="DBL_MIN_EXP" value="-1021"/>
-  <define name="DBL_MIN_10_EXP" value="-307"/>
-  <define name="DBL_MAX_EXP" value="1024"/>
-  <define name="DBL_MAX_10_EXP" value="308"/>
-  <define name="LDBL_MIN" value="3.362103e-4932"/>
-  <define name="LDBL_MAX" value="1.189731e+4932"/>
-  <define name="LDBL_EPSILON" value="1.084202e-19"/>
-  <define name="LDBL_DIG" value="18"/>
-  <define name="LDBL_MANT_DIG" value="64"/>
-  <define name="LDBL_MIN_EXP" value="-16381"/>
-  <define name="LDBL_MIN_10_EXP" value="-4931"/>
-  <define name="LDBL_MAX_EXP" value="16384"/>
-  <define name="LDBL_MAX_10_EXP" value="4932"/>
   <define name="INT8_MIN" value="-128"/>
   <define name="INT16_MIN" value="-32768"/>
   <define name="INT32_MIN" value="-2147483648"/>