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

An upcoming commit will change the storage-class attributes in
globals.h to be controlled only by the GVDLL symbol, not also by the
WIN32_DLL symbol.

Without this change, errors like this would occur:

twopigen.lib(twopiinit.obj) : error LNK2001: unresolved external symbol _Ndim

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

diff --git a/lib/twopigen/gvtwopigen.vcxproj b/lib/twopigen/gvtwopigen.vcxproj
index b9cd730c44026e5565ecea1f3a0ce93c9d2ef409..837f4348775d883400a60c0ba33ed50c1ec1bf7e 100644 (file)
--- a/lib/twopigen/gvtwopigen.vcxproj
+++ b/lib/twopigen/gvtwopigen.vcxproj
@@ -53,7 +53,7 @@
     <ClCompile>
       <Optimization>Disabled</Optimization>
       <AdditionalIncludeDirectories>$(SolutionDir)windows\include;$(SolutionDir)lib;$(SolutionDir)lib\cdt;$(SolutionDir)lib\cgraph;$(SolutionDir)lib\common;$(SolutionDir)lib\gvc;$(SolutionDir)lib\pack;$(SolutionDir)lib\pathplan;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_DEBUG;_LIB;WIN32_DLL;NEATOGEN_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;_LIB;GVDLL;WIN32_DLL;NEATOGEN_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
       <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
       <PrecompiledHeader />
@@ -67,7 +67,7 @@
   <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;$(SolutionDir)lib\pack;$(SolutionDir)lib\pathplan;;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>NDEBUG;_LIB;WIN32_DLL;NEATOGEN_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>NDEBUG;_LIB;GVDLL;WIN32_DLL;NEATOGEN_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeader />
       <WarningLevel>Level4</WarningLevel>
       <EnablePREfast>true</EnablePREfast>