build: activate static initializers in any project referencing a Lol Engine project

build/msbuild/embed.props

@@ -12,7 +12,7 @@
   <ItemDefinitionGroup>
     <LolEmbed>
       <CppFileName>$(IntDir)embedded\%(FileName)%(Extension).g.cpp</CppFileName>
-      <ObjFileName>$(IntDir)embedded\%(FileName)%(Extension).g.obj</ObjFileName>
+      <ObjFileName>$(IntDir)embedded\%(FileName)%(Extension).g$(ObjectExt)</ObjFileName>
       <UpToDateCheckInput>True</UpToDateCheckInput>
       <ExecutionDescription>%(FileName)%(Extension) -> %(FileName)%(Extension).g.cpp [embedded]</ExecutionDescription>
     </LolEmbed>

build/msbuild/embed.targets

@@ -140,7 +140,7 @@
 
     <ItemGroup>
       <ClCompile Include="$(LolEmbedRegistry).g.cpp" Condition="'@(LolEmbed)'!=''">
-        <ObjectFileName>$(LolEmbedRegistry).g.obj</ObjectFileName>
+        <ObjectFileName>$(LolEmbedRegistry).g$(ObjectExt)</ObjectFileName>
       </ClCompile>
     </ItemGroup>
 
@@ -153,14 +153,15 @@
 
 
   <!--=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-     - LolGatherStaticInitializers target
+     - GatherLolStaticInitializers/LinkLolStaticInitializers targets
      -
      - List all static initializers, including those of referenced projects, and put the
      - result in the @(LolStaticInitializers) item group. Also return the result as a task
      - output so that referencing projects can use it!
      -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-->
 
-  <Target Name="LolGatherStaticInitializers" BeforeTargets="ClCompile" Outputs="@(LolStaticInitializers)">
+  <Target Name="GatherLolStaticInitializers" BeforeTargets="PrepareForBuild"
+          Outputs="@(LolStaticInitializers)">
 
     <!-- Static initializer from the LolEmbed registry -->
     <ItemGroup Condition="'$(ConfigurationType)'=='StaticLibrary' and '@(LolEmbed)'!=''">
@@ -168,14 +169,23 @@
     </ItemGroup>
 
     <!-- Static initializers from all referenced projects -->
-    <MSBuild Projects="@(ProjectReference)" Targets="LolGatherStaticInitializers" SkipNonexistentTargets="false">
+    <MSBuild Projects="@(ProjectReference)" Targets="GatherLolStaticInitializers" SkipNonexistentTargets="false">
       <Output TaskParameter="TargetOutputs" ItemName="_ReferencedStaticInitializers" />
     </MSBuild>
 
+    <!-- Create the LolStaticInitializers item group for later use -->
     <ItemGroup>
       <LolStaticInitializers Include="@(_ReferencedStaticInitializers)" />
     </ItemGroup>
+  </Target>
 
+  <Target Name="LinkLolStaticInitializers" BeforeTargets="Link" DependsOnTargets="GatherLolStaticInitializers"
+          Condition="'@(LolStaticInitializers)'!=''">
+    <ItemGroup>
+      <Link>
+        <AdditionalOptions>%(Link.AdditionalOptions) @(LolStaticInitializers-&gt;'$(ExportSymbolLinkerFlag)%(Identity)', ' ')</AdditionalOptions>
+      </Link>
+    </ItemGroup>
   </Target>
 
 </Project>

build/msbuild/rules.props

@@ -10,6 +10,14 @@
     <BinDir>$([MSBuild]::MakeRelative("$(ProjectDir)","$(SolutionDir)"))binaries\</BinDir>
     <OutDir>$(BinDir)$(Platform.ToLower())-$(PlatformToolset.ToLower())-$(Configuration.ToLower())\</OutDir>
     <IntDir>$(OutDir)obj\$(ProjectName)\</IntDir>
+    <ObjectExt Condition="'$(ObjectExt)'==''">.obj</ObjectExt>
+  </PropertyGroup>
+
+  <!-- The linker flag to export a symbol and force it to be pulled from a static
+     - library even if it is not referenced in the code.
+   -->
+  <PropertyGroup>
+    <ExportSymbolLinkerFlag Condition="'$(ExportSymbolLinkerFlag)'==''">/EXPORT:</ExportSymbolLinkerFlag>
   </PropertyGroup>
 
   <ItemDefinitionGroup>