dot: MSBuild: define GVDLL to ensure correct storage-class attributes

An upcoming commit will change the storage-class attributes to be
controlled by the GVDLL symbol in cgraph.h.

Without this change, errors like this would occur:

dot.obj : error LNK2001: unresolved external symbol _Agdirected

Towards https://gitlab.com/graphviz/graphviz/-/issues/2173.

diff --git a/cmd/dot/dot.vcxproj b/cmd/dot/dot.vcxproj
index 475051b4e4d4d4245dd0b87f9eb9847750887e31..9517acb27f9dcc2c236e31531987e18657e70787 100644 (file)
--- a/cmd/dot/dot.vcxproj
+++ b/cmd/dot/dot.vcxproj
@@ -52,7 +52,7 @@
     <ClCompile>
       <Optimization>Disabled</Optimization>
       <AdditionalIncludeDirectories>$(SolutionDir)windows\include;$(SolutionDir)lib;$(SolutionDir)lib\cdt;$(SolutionDir)lib\cgraph;$(SolutionDir)lib\common;$(SolutionDir)lib\gvc;$(SolutionDir)lib\pathplan;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_DEBUG;_CONSOLE;WIN32_DLL;DEMAND_LOADING;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;GVDLL;WIN32_DLL;DEMAND_LOADING;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
       <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
       <PrecompiledHeader />
@@ -83,7 +83,7 @@ copy /B /Y $(OutDir)dot.exe $(OutDir)twopi.exe</Command>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <ClCompile>
       <AdditionalIncludeDirectories>$(SolutionDir)windows\include;$(SolutionDir)lib;$(SolutionDir)lib\cdt;$(SolutionDir)lib\cgraph;$(SolutionDir)lib\common;$(SolutionDir)lib\gvc;$(SolutionDir)lib\pathplan;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>NDEBUG;_CONSOLE;WIN32_DLL;DEMAND_LOADING;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;GVDLL;WIN32_DLL;DEMAND_LOADING;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeader />
       <WarningLevel>Level4</WarningLevel>
       <EnablePREfast>true</EnablePREfast>