ENH: Added information about target needing a source file when one cannot be found.

Source/cmSourceFile.cxx

@@ -23,9 +23,10 @@
 // The class must be found in dir and end in name.cxx, name.txx, 
 // name.c or it will be considered a header file only class
 // and not included in the build process
-void cmSourceFile::SetName(const char* name, const char* dir,
+bool cmSourceFile::SetName(const char* name, const char* dir,
                            const std::vector<std::string>& sourceExts,
-                           const std::vector<std::string>& headerExts)
+                           const std::vector<std::string>& headerExts,
+                           const char* target)
 {
 
   this->SetProperty("HEADER_FILE_ONLY","1");
@@ -79,7 +80,7 @@ void cmSourceFile::SetName(const char* name, const char* dir,
       {
       this->SetProperty("EXTERNAL_OBJECT", "1");
       }
-    return;
+    return true;
     }
   
   // Next, try the various source extensions
@@ -94,7 +95,7 @@ void cmSourceFile::SetName(const char* name, const char* dir,
       this->SourceExtension = *ext;
       this->SetProperty("HEADER_FILE_ONLY","0");
       this->FullPath = hname;
-      return;
+      return true;
       }
     }
 
@@ -109,25 +110,29 @@ void cmSourceFile::SetName(const char* name, const char* dir,
       {
       this->SourceExtension = *ext;
       this->FullPath = hname;
-      return;
+      return true;
       }
     }
 
-  std::string errorMsg = "\n\nTried";
+  cmOStringStream e;
+  e << "Cannot find source file \"" << pathname << "\"";
+  if(target)
+    {
+    e << " for target \"" << target << "\"";
+    }
+  e << "\n\nTried extensions";
   for( std::vector<std::string>::const_iterator ext = sourceExts.begin();
        ext != sourceExts.end(); ++ext )
     {
-    errorMsg += " .";
-    errorMsg += *ext;
+    e << " ." << *ext;
     }
   for( std::vector<std::string>::const_iterator ext = headerExts.begin();
        ext != headerExts.end(); ++ext )
     {
-    errorMsg += " .";
-    errorMsg += *ext;
+    e << " ." << *ext;
     }
-  cmSystemTools::Error("can not find file ", pathname.c_str(), 
-                       errorMsg.c_str());
+  cmSystemTools::Error(e.str().c_str());
+  return false;
 }
 
 void cmSourceFile::SetName(const char* name, const char* dir, const char *ext,

Source/cmSourceFile.h

@@ -46,9 +46,10 @@ public:
    * in.  The various extensions provided are tried on the name
    * (e.g., cxx, cpp) in the directory to find the actual file.
    */
-  void SetName(const char* name, const char* dir,
+  bool SetName(const char* name, const char* dir,
                const std::vector<std::string>& sourceExts,
-               const std::vector<std::string>& headerExts);
+               const std::vector<std::string>& headerExts,
+               const char* target = 0);
 
   /**
    * Get the list of the custom commands for this source file

Source/cmTarget.cxx

@@ -299,7 +299,7 @@ void cmTarget::GenerateSourceFilesFromSourceLists( cmMakefile &mf)
       file.SetProperty("ABSTRACT","0");
       file.SetName(temps.c_str(), mf.GetCurrentDirectory(),
                    mf.GetSourceExtensions(),
-                   mf.GetHeaderExtensions());
+                   mf.GetHeaderExtensions(), this->Name.c_str());
       this->SourceFiles.push_back(mf.AddSource(file));
       }
     }