Add IPO compiler flags more consistently in generators

Move addition of IPO flags into `cmLocalGenerator::AddLanguageFlags`
because all call sites of that need the IPO flags, but not all were
following the call with `AppendFeatureOptions`.

Source/cmCommonTargetGenerator.cxx

@@ -47,11 +47,8 @@ void cmCommonTargetGenerator::AddFeatureFlags(std::string& flags,
                                               const std::string& lang)
 {
   // Add language-specific flags.
-  this->LocalGenerator->AddLanguageFlags(flags, lang, this->ConfigName);
-
-  if (this->GeneratorTarget->IsIPOEnabled(this->ConfigName)) {
-    this->LocalGenerator->AppendFeatureOptions(flags, lang, "IPO");
-  }
+  this->LocalGenerator->AddLanguageFlags(flags, this->GeneratorTarget, lang,
+                                         this->ConfigName);
 }
 
 void cmCommonTargetGenerator::AddModuleDefinitionFlag(

Source/cmGhsMultiTargetGenerator.cxx

@@ -232,10 +232,12 @@ void cmGhsMultiTargetGenerator::SetCompilerFlags(std::string const& config,
     const char* lang = language.c_str();
 
     if (notKernel) {
-      this->LocalGenerator->AddLanguageFlags(flags, lang, config);
+      this->LocalGenerator->AddLanguageFlags(flags, this->GeneratorTarget,
+                                             lang, config);
     } else {
-      this->LocalGenerator->AddLanguageFlags(
-        flags, lang + std::string("_GHS_KERNEL"), config);
+      this->LocalGenerator->AddLanguageFlags(flags, this->GeneratorTarget,
+                                             lang + std::string("_GHS_KERNEL"),
+                                             config);
     }
     this->LocalGenerator->AddCMP0018Flags(flags, this->GeneratorTarget, lang,
                                           config);

Source/cmGlobalXCodeGenerator.cxx

@@ -1662,7 +1662,8 @@ void cmGlobalXCodeGenerator::CreateBuildSettings(cmGeneratorTarget* gtgt,
     std::string& flags = cflags[lang];
 
     // Add language-specific flags.
-    this->CurrentLocalGenerator->AddLanguageFlags(flags, lang, configName);
+    this->CurrentLocalGenerator->AddLanguageFlags(flags, gtgt, lang,
+                                                  configName);
 
     // Add shared-library flags if needed.
     this->CurrentLocalGenerator->AddCMP0018Flags(flags, gtgt, lang,

Source/cmLocalGenerator.cxx

@@ -985,7 +985,7 @@ void cmLocalGenerator::GetTargetFlags(
           target->GetName().c_str());
         return;
       }
-      this->AddLanguageFlags(flags, linkLanguage, buildType);
+      this->AddLanguageFlags(flags, target, linkLanguage, buildType);
       if (pcli) {
         this->OutputLinkLibraries(pcli, linkLineComputer, linkLibs,
                                   frameworkPath, linkPath);
@@ -1050,11 +1050,7 @@ void cmLocalGenerator::GetTargetCompileFlags(cmGeneratorTarget* target,
   cmMakefile* mf = this->GetMakefile();
 
   // Add language-specific flags.
-  this->AddLanguageFlags(flags, lang, config);
-
-  if (target->IsIPOEnabled(config)) {
-    this->AppendFeatureOptions(flags, lang, "IPO");
-  }
+  this->AddLanguageFlags(flags, target, lang, config);
 
   this->AddArchitectureFlags(flags, target, lang, config);
 
@@ -1287,6 +1283,7 @@ void cmLocalGenerator::AddArchitectureFlags(std::string& flags,
 }
 
 void cmLocalGenerator::AddLanguageFlags(std::string& flags,
+                                        cmGeneratorTarget const* target,
                                         const std::string& lang,
                                         const std::string& config)
 {
@@ -1295,6 +1292,10 @@ void cmLocalGenerator::AddLanguageFlags(std::string& flags,
   flagsVar += lang;
   flagsVar += "_FLAGS";
   this->AddConfigVariableFlags(flags, flagsVar, config);
+
+  if (target->IsIPOEnabled(config)) {
+    this->AppendFeatureOptions(flags, lang, "IPO");
+  }
 }
 
 cmGeneratorTarget* cmLocalGenerator::FindGeneratorTargetToUse(

Source/cmLocalGenerator.h

@@ -98,8 +98,8 @@ public:
                             const std::string& lang,
                             const std::string& config);
 
-  void AddLanguageFlags(std::string& flags, const std::string& lang,
-                        const std::string& config);
+  void AddLanguageFlags(std::string& flags, cmGeneratorTarget const* target,
+                        const std::string& lang, const std::string& config);
   void AddCMP0018Flags(std::string& flags, cmGeneratorTarget const* target,
                        std::string const& lang, const std::string& config);
   void AddVisibilityPresetFlags(std::string& flags,

Source/cmNinjaNormalTargetGenerator.cxx

@@ -655,7 +655,7 @@ void cmNinjaNormalTargetGenerator::WriteDeviceLinkStatement()
     localGen.AddArchitectureFlags(t, &genTarget, cudaLinkLanguage, cfgName);
     vars["ARCH_FLAGS"] = t;
     t = "";
-    localGen.AddLanguageFlags(t, cudaLinkLanguage, cfgName);
+    localGen.AddLanguageFlags(t, &genTarget, cudaLinkLanguage, cfgName);
     vars["LANGUAGE_COMPILE_FLAGS"] = t;
   }
   if (this->GetGeneratorTarget()->HasSOName(cfgName)) {
@@ -874,7 +874,7 @@ void cmNinjaNormalTargetGenerator::WriteLinkStatement()
     vars["ARCH_FLAGS"] = t;
     t = "";
     t += lwyuFlags;
-    localGen.AddLanguageFlags(t, TargetLinkLanguage, cfgName);
+    localGen.AddLanguageFlags(t, &genTarget, TargetLinkLanguage, cfgName);
     vars["LANGUAGE_COMPILE_FLAGS"] = t;
   }
   if (this->GetGeneratorTarget()->HasSOName(cfgName)) {