dotgen: 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:

dotgen.lib(mincross.obj) : error LNK2001: unresolved external symbol _Agstrictdirected

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

diff --git a/lib/dotgen/gvdotgen.vcxproj b/lib/dotgen/gvdotgen.vcxproj
index 0a55a267b41520ac6c80c203c2cb91abdd83832e..5640914abd4f7f1b8a394fd654e2e26334b52743 100644 (file)
--- a/lib/dotgen/gvdotgen.vcxproj
+++ b/lib/dotgen/gvdotgen.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;$(SolutionDir)lib\pathplan;$(SolutionDir)lib\pack;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_DEBUG;_LIB;WIN32_DLL;_TEST_;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;_LIB;GVDLL;WIN32_DLL;_TEST_;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
       <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
       <PrecompiledHeader />
@@ -71,7 +71,7 @@
   <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;$(SolutionDir)lib\pathplan;$(SolutionDir)lib\pack;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>NDEBUG;_LIB;WIN32_DLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>NDEBUG;_LIB;GVDLL;WIN32_DLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeader />
       <WarningLevel>Level4</WarningLevel>
       <EnablePREfast>true</EnablePREfast>