cmLocalGenerator: Add ComputeObjectFilenames interface.

Implement it in the local generators and use it in the global
generators.

1 files changed, 28 insertions, 0 deletions

diff --git a/Source/cmLocalXCodeGenerator.cxx b/Source/cmLocalXCodeGenerator.cxx
index 5857aefa0a..8ff6c87d68 100644
--- a/Source/cmLocalXCodeGenerator.cxx
+++ b/Source/cmLocalXCodeGenerator.cxx
@@ -71,3 +71,31 @@ void cmLocalXCodeGenerator::GenerateInstallRules()
     t->HasMacOSXRpathInstallNameDir("");
     }
 }
+
+//----------------------------------------------------------------------------
+void cmLocalXCodeGenerator::ComputeObjectFilenames(
+                        std::map<cmSourceFile const*, std::string>& mapping,
+                        cmGeneratorTarget const*)
+{
+  // Count the number of object files with each name. Warn about duplicate
+  // names since Xcode names them uniquely automatically with a numeric suffix
+  // to avoid exact duplicate file names. Note that Mac file names are not
+  // typically case sensitive, hence the LowerCase.
+  std::map<std::string, int> counts;
+  for(std::map<cmSourceFile const*, std::string>::iterator
+      si = mapping.begin(); si != mapping.end(); ++si)
+    {
+    cmSourceFile const* sf = si->first;
+    std::string objectName =
+      cmSystemTools::GetFilenameWithoutLastExtension(sf->GetFullPath());
+    objectName += ".o";
+
+    std::string objectNameLower = cmSystemTools::LowerCase(objectName);
+    counts[objectNameLower] += 1;
+    if (2 == counts[objectNameLower])
+      {
+      // TODO: emit warning about duplicate name?
+      }
+    si->second = objectName;
+    }
+}