Refactor module definition file selection

Create a `ModuleDefinitionInfo` structure for each configuration of a
target to hold corresponding information about the selected module
definition file (`.def` source).

Source/cmCommonTargetGenerator.cxx

@@ -26,7 +26,6 @@ cmCommonTargetGenerator::cmCommonTargetGenerator(cmGeneratorTarget* gt)
   , GlobalGenerator(static_cast<cmGlobalCommonGenerator*>(
       gt->LocalGenerator->GetGlobalGenerator()))
   , ConfigName(LocalGenerator->GetConfigName())
-  , ModuleDefinitionFile(GeneratorTarget->GetModuleDefinitionFile(ConfigName))
 {
 }
 
@@ -63,14 +62,9 @@ void cmCommonTargetGenerator::AddFeatureFlags(std::string& flags,
 void cmCommonTargetGenerator::AddModuleDefinitionFlag(
   cmLinkLineComputer* linkLineComputer, std::string& flags)
 {
-  // A module definition file only makes sense on certain target types.
-  if (this->GeneratorTarget->GetType() != cmStateEnums::SHARED_LIBRARY &&
-      this->GeneratorTarget->GetType() != cmStateEnums::MODULE_LIBRARY &&
-      this->GeneratorTarget->GetType() != cmStateEnums::EXECUTABLE) {
-    return;
-  }
-
-  if (!this->ModuleDefinitionFile) {
+  cmGeneratorTarget::ModuleDefinitionInfo const* mdi =
+    this->GeneratorTarget->GetModuleDefinitionInfo(this->GetConfigName());
+  if (!mdi || mdi->DefFile.empty()) {
     return;
   }
 
@@ -85,8 +79,7 @@ void cmCommonTargetGenerator::AddModuleDefinitionFlag(
   // vs6's "cl -link" pass it to the linker.
   std::string flag = defFileFlag;
   flag += this->LocalGenerator->ConvertToOutputFormat(
-    linkLineComputer->ConvertToLinkReference(
-      this->ModuleDefinitionFile->GetFullPath()),
+    linkLineComputer->ConvertToLinkReference(mdi->DefFile),
     cmOutputConverter::SHELL);
   this->LocalGenerator->AppendFlags(flags, flag);
 }

Source/cmCommonTargetGenerator.h

@@ -44,9 +44,6 @@ protected:
   cmGlobalCommonGenerator* GlobalGenerator;
   std::string ConfigName;
 
-  // The windows module definition source file (.def), if any.
-  cmSourceFile const* ModuleDefinitionFile;
-
   void AppendFortranFormatFlags(std::string& flags,
                                 cmSourceFile const& source);
 

Source/cmGeneratorTarget.cxx

@@ -1944,16 +1944,40 @@ cmGeneratorTarget::CompileInfo const* cmGeneratorTarget::GetCompileInfo(
   return &i->second;
 }
 
-cmSourceFile const* cmGeneratorTarget::GetModuleDefinitionFile(
-  const std::string& config) const
+cmGeneratorTarget::ModuleDefinitionInfo const*
+cmGeneratorTarget::GetModuleDefinitionInfo(std::string const& config) const
 {
-  std::vector<cmSourceFile const*> data;
-  this->GetModuleDefinitionSources(data, config);
-  if (!data.empty()) {
-    return data.front();
+  // A module definition file only makes sense on certain target types.
+  if (this->GetType() != cmStateEnums::SHARED_LIBRARY &&
+      this->GetType() != cmStateEnums::MODULE_LIBRARY &&
+      !this->IsExecutableWithExports()) {
+    return CM_NULLPTR;
   }
 
-  return CM_NULLPTR;
+  // Lookup/compute/cache the compile information for this configuration.
+  std::string config_upper;
+  if (!config.empty()) {
+    config_upper = cmSystemTools::UpperCase(config);
+  }
+  ModuleDefinitionInfoMapType::const_iterator i =
+    this->ModuleDefinitionInfoMap.find(config_upper);
+  if (i == this->ModuleDefinitionInfoMap.end()) {
+    ModuleDefinitionInfo info;
+    this->ComputeModuleDefinitionInfo(config, info);
+    ModuleDefinitionInfoMapType::value_type entry(config_upper, info);
+    i = this->ModuleDefinitionInfoMap.insert(entry).first;
+  }
+  return &i->second;
+}
+
+void cmGeneratorTarget::ComputeModuleDefinitionInfo(
+  std::string const& config, ModuleDefinitionInfo& info) const
+{
+  std::vector<cmSourceFile const*> sources;
+  this->GetModuleDefinitionSources(sources, config);
+  if (!sources.empty()) {
+    info.DefFile = sources.front()->GetFullPath();
+  }
 }
 
 bool cmGeneratorTarget::IsDLLPlatform() const

Source/cmGeneratorTarget.h

@@ -235,7 +235,12 @@ public:
   cmLocalGenerator* LocalGenerator;
   cmGlobalGenerator const* GlobalGenerator;
 
-  cmSourceFile const* GetModuleDefinitionFile(const std::string& config) const;
+  struct ModuleDefinitionInfo
+  {
+    std::string DefFile;
+  };
+  ModuleDefinitionInfo const* GetModuleDefinitionInfo(
+    std::string const& config) const;
 
   /** Return whether or not the target is for a DLL platform.  */
   bool IsDLLPlatform() const;
@@ -723,6 +728,12 @@ private:
   typedef std::map<std::string, OutputInfo> OutputInfoMapType;
   mutable OutputInfoMapType OutputInfoMap;
 
+  typedef std::map<std::string, ModuleDefinitionInfo>
+    ModuleDefinitionInfoMapType;
+  mutable ModuleDefinitionInfoMapType ModuleDefinitionInfoMap;
+  void ComputeModuleDefinitionInfo(std::string const& config,
+                                   ModuleDefinitionInfo& info) const;
+
   typedef std::pair<std::string, bool> OutputNameKey;
   typedef std::map<OutputNameKey, std::string> OutputNameMapType;
   mutable OutputNameMapType OutputNameMap;

Source/cmLocalVisualStudio7Generator.cxx

@@ -996,9 +996,11 @@ void cmLocalVisualStudio7Generator::OutputBuildTool(
   linkOptions.AddTable(cmLocalVisualStudio7GeneratorLinkFlagTable);
 
   linkOptions.Parse(extraLinkOptions.c_str());
-  if (!this->ModuleDefinitionFile.empty()) {
-    std::string defFile = this->ConvertToOutputFormat(
-      this->ModuleDefinitionFile, cmOutputConverter::SHELL);
+  cmGeneratorTarget::ModuleDefinitionInfo const* mdi =
+    target->GetModuleDefinitionInfo(configName);
+  if (mdi && !mdi->DefFile.empty()) {
+    std::string defFile =
+      this->ConvertToOutputFormat(mdi->DefFile, cmOutputConverter::SHELL);
     linkOptions.AddFlag("ModuleDefinitionFile", defFile.c_str());
   }
 
@@ -1362,7 +1364,6 @@ void cmLocalVisualStudio7Generator::WriteVCProjFile(std::ostream& fout,
   std::vector<cmSourceGroup> sourceGroups = this->Makefile->GetSourceGroups();
 
   // get the classes from the source lists then add them to the groups
-  this->ModuleDefinitionFile = "";
   std::vector<cmSourceFile*> classes;
   if (!target->GetConfigCommonSourceFiles(classes)) {
     return;
@@ -1374,9 +1375,6 @@ void cmLocalVisualStudio7Generator::WriteVCProjFile(std::ostream& fout,
     }
     // Add the file to the list of sources.
     std::string source = (*i)->GetFullPath();
-    if (cmSystemTools::UpperCase((*i)->GetExtension()) == "DEF") {
-      this->ModuleDefinitionFile = (*i)->GetFullPath();
-    }
     cmSourceGroup* sourceGroup =
       this->Makefile->FindSourceGroup(source.c_str(), sourceGroups);
     sourceGroup->AssignSource(*i);

Source/cmLocalVisualStudio7Generator.h

@@ -128,7 +128,6 @@ private:
 
   friend class EventWriter;
 
-  std::string ModuleDefinitionFile;
   bool FortranProject;
   bool WindowsCEProject;
   cmLocalVisualStudio7GeneratorInternals* Internal;

Source/cmMakefileTargetGenerator.cxx

@@ -1414,8 +1414,10 @@ void cmMakefileTargetGenerator::AppendLinkDepends(
   this->AppendTargetDepends(depends);
 
   // Add a dependency on the link definitions file, if any.
-  if (this->ModuleDefinitionFile) {
-    depends.push_back(this->ModuleDefinitionFile->GetFullPath());
+  cmGeneratorTarget::ModuleDefinitionInfo const* mdi =
+    this->GeneratorTarget->GetModuleDefinitionInfo(this->GetConfigName());
+  if (mdi && !mdi->DefFile.empty()) {
+    depends.push_back(mdi->DefFile);
   }
 
   // Add a dependency on user-specified manifest files, if any.

Source/cmNinjaTargetGenerator.cxx

@@ -212,9 +212,10 @@ cmNinjaDeps cmNinjaTargetGenerator::ComputeLinkDeps() const
   std::transform(deps.begin(), deps.end(), result.begin(), MapToNinjaPath());
 
   // Add a dependency on the link definitions file, if any.
-  if (this->ModuleDefinitionFile) {
-    result.push_back(
-      this->ConvertToNinjaPath(this->ModuleDefinitionFile->GetFullPath()));
+  cmGeneratorTarget::ModuleDefinitionInfo const* mdi =
+    this->GeneratorTarget->GetModuleDefinitionInfo(this->GetConfigName());
+  if (mdi && !mdi->DefFile.empty()) {
+    result.push_back(this->ConvertToNinjaPath(mdi->DefFile));
   }
 
   // Add a dependency on user-specified manifest files, if any.

Source/cmVisualStudio10TargetGenerator.cxx

@@ -2914,10 +2914,10 @@ bool cmVisualStudio10TargetGenerator::ComputeLinkOptions(
   linkOptions.Parse(flags.c_str());
 
   if (this->MSTools) {
-    if (cmSourceFile const* defsrc =
-          this->GeneratorTarget->GetModuleDefinitionFile("")) {
-      linkOptions.AddFlag("ModuleDefinitionFile",
-                          defsrc->GetFullPath().c_str());
+    cmGeneratorTarget::ModuleDefinitionInfo const* mdi =
+      this->GeneratorTarget->GetModuleDefinitionInfo(config);
+    if (mdi && !mdi->DefFile.empty()) {
+      linkOptions.AddFlag("ModuleDefinitionFile", mdi->DefFile.c_str());
     }
     linkOptions.AppendFlag("IgnoreSpecificDefaultLibraries",
                            "%(IgnoreSpecificDefaultLibraries)");