Makefile,Ninja: De-duplicate ComputeObjectFilenames method

Move the method implementation up to `cmLocalCommonGenerator`
to avoid duplicating it in each generator.

Source/cmLocalCommonGenerator.cxx

@@ -2,6 +2,7 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmLocalCommonGenerator.h"
 
+#include <utility>
 #include <vector>
 
 #include "cmGeneratorTarget.h"
@@ -76,3 +77,17 @@ std::string cmLocalCommonGenerator::GetTargetFortranFlags(
 
   return flags;
 }
+
+void cmLocalCommonGenerator::ComputeObjectFilenames(
+  std::map<cmSourceFile const*, std::string>& mapping,
+  cmGeneratorTarget const* gt)
+{
+  // Determine if these object files should use a custom extension
+  char const* custom_ext = gt->GetCustomObjectExtension();
+  for (auto& si : mapping) {
+    cmSourceFile const* sf = si.first;
+    bool keptSourceExtension;
+    si.second = this->GetObjectFileNameWithoutTarget(
+      *sf, gt->ObjectDirectory, &keptSourceExtension, custom_ext);
+  }
+}

Source/cmLocalCommonGenerator.h

@@ -5,6 +5,7 @@
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
+#include <map>
 #include <string>
 
 #include "cmLocalGenerator.h"
@@ -12,6 +13,7 @@
 class cmGeneratorTarget;
 class cmGlobalGenerator;
 class cmMakefile;
+class cmSourceFile;
 
 /** \class cmLocalCommonGenerator
  * \brief Common infrastructure for Makefile and Ninja local generators.
@@ -30,6 +32,10 @@ public:
   std::string GetTargetFortranFlags(cmGeneratorTarget const* target,
                                     std::string const& config) override;
 
+  void ComputeObjectFilenames(
+    std::map<cmSourceFile const*, std::string>& mapping,
+    cmGeneratorTarget const* gt = nullptr) override;
+
 protected:
   std::string WorkingDirectory;
 

Source/cmLocalNinjaGenerator.cxx

@@ -246,20 +246,6 @@ void cmLocalNinjaGenerator::WriteNinjaFilesInclusion(std::ostream& os)
   os << "\n";
 }
 
-void cmLocalNinjaGenerator::ComputeObjectFilenames(
-  std::map<cmSourceFile const*, std::string>& mapping,
-  cmGeneratorTarget const* gt)
-{
-  // Determine if these object files should use a custom extension
-  char const* custom_ext = gt->GetCustomObjectExtension();
-  for (auto& si : mapping) {
-    cmSourceFile const* sf = si.first;
-    bool keptSourceExtension;
-    si.second = this->GetObjectFileNameWithoutTarget(
-      *sf, gt->ObjectDirectory, &keptSourceExtension, custom_ext);
-  }
-}
-
 void cmLocalNinjaGenerator::WriteProcessedMakefile(std::ostream& os)
 {
   cmGlobalNinjaGenerator::WriteDivider(os);

Source/cmLocalNinjaGenerator.h

@@ -23,7 +23,6 @@ class cmGlobalGenerator;
 class cmGlobalNinjaGenerator;
 class cmMakefile;
 class cmRulePlaceholderExpander;
-class cmSourceFile;
 class cmake;
 
 /**
@@ -74,10 +73,6 @@ public:
   void AppendCustomCommandDeps(cmCustomCommandGenerator const& ccg,
                                cmNinjaDeps& ninjaDeps);
 
-  void ComputeObjectFilenames(
-    std::map<cmSourceFile const*, std::string>& mapping,
-    cmGeneratorTarget const* gt = nullptr) override;
-
 protected:
   std::string ConvertToIncludeReference(
     std::string const& path,

Source/cmLocalUnixMakefileGenerator3.cxx

@@ -150,20 +150,6 @@ void cmLocalUnixMakefileGenerator3::ComputeHomeRelativeOutputPath()
   }
 }
 
-void cmLocalUnixMakefileGenerator3::ComputeObjectFilenames(
-  std::map<cmSourceFile const*, std::string>& mapping,
-  cmGeneratorTarget const* gt)
-{
-  // Determine if these object files should use a custom extension
-  char const* custom_ext = gt->GetCustomObjectExtension();
-  for (auto& si : mapping) {
-    cmSourceFile const* sf = si.first;
-    bool keptSourceExtension;
-    si.second = this->GetObjectFileNameWithoutTarget(
-      *sf, gt->ObjectDirectory, &keptSourceExtension, custom_ext);
-  }
-}
-
 void cmLocalUnixMakefileGenerator3::GetLocalObjectFiles(
   std::map<std::string, LocalObjectInfo>& localObjectFiles)
 {

Source/cmLocalUnixMakefileGenerator3.h

@@ -19,7 +19,6 @@ class cmCustomCommandGenerator;
 class cmGeneratorTarget;
 class cmGlobalGenerator;
 class cmMakefile;
-class cmSourceFile;
 
 /** \class cmLocalUnixMakefileGenerator3
  * \brief Write a LocalUnix makefiles.
@@ -252,10 +251,6 @@ protected:
 private:
   std::string MaybeConvertWatcomShellCommand(std::string const& cmd);
 
-  void ComputeObjectFilenames(
-    std::map<cmSourceFile const*, std::string>& mapping,
-    cmGeneratorTarget const* gt = nullptr) override;
-
   friend class cmMakefileTargetGenerator;
   friend class cmMakefileExecutableTargetGenerator;
   friend class cmMakefileLibraryTargetGenerator;