/MT rather than /MD; see mockingbirdnest/Principia#4190.

Author: eggrobin

msvc/core-math.props

@@ -83,6 +83,7 @@
   <ItemDefinitionGroup Condition="!$(PrincipiaOptimize)">
     <ClCompile>
       <Optimization>Disabled</Optimization>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
     </ClCompile>
     <Link></Link>
   </ItemDefinitionGroup>
@@ -93,6 +94,7 @@
   <ItemDefinitionGroup Condition="$(PrincipiaOptimize)">
     <ClCompile>
       <Optimization>MaxSpeed</Optimization>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>