ENH: add a --trace option

Source/cmMakefile.cxx

@@ -395,6 +395,21 @@ bool cmMakefile::ExecuteCommand(const cmListFileFunction& lff,
     if(pcmd->GetEnabled() && !cmSystemTools::GetFatalErrorOccured()  &&
        (!this->GetCMakeInstance()->GetScriptMode() || pcmd->IsScriptable()))
       {
+      // if trace is one, print out invoke information
+      if(this->GetCMakeInstance()->GetTrace())
+        {
+        cmOStringStream msg;
+        msg << lff.FilePath << "(" << lff.Line << "):  ";
+        msg << lff.Name << "(";
+        for(std::vector<cmListFileArgument>::const_iterator i = 
+              lff.Arguments.begin(); i != lff.Arguments.end(); ++i)
+          {
+          msg << i->Value;
+          msg << " ";
+          }
+        msg << ")";
+        cmSystemTools::Message(msg.str().c_str());
+        }
       // Try invoking the command.
       if(!pcmd->InvokeInitialPass(lff.Arguments,status) ||
          status.GetNestedError())

Source/cmake.cxx

@@ -140,6 +140,7 @@ void cmNeedBackwardsCompatibility(const std::string& variable,
 
 cmake::cmake()
 {
+  this->Trace = false;
   this->SuppressDevWarnings = false;
   this->DoSuppressDevWarnings = false;
   this->DebugOutput = false;
@@ -618,6 +619,11 @@ void cmake::SetArgs(const std::vector<std::string>& args)
       std::cout << "Running with debug output on.\n";
       this->SetDebugOutputOn(true);
       }
+    else if(arg.find("--trace",0) == 0)
+      {
+      std::cout << "Running with trace output on.\n";
+      this->SetTrace(true);
+      }
     else if(arg.find("-G",0) == 0)
       {
       std::string value = arg.substr(2);

Source/cmake.h

@@ -314,6 +314,9 @@ class cmake
   bool GetDebugOutput() { return this->DebugOutput; }
   void SetDebugOutputOn(bool b) { this->DebugOutput = b;}
 
+  // Do we want trace output during the cmake run.
+  bool GetTrace() { return this->Trace;}
+  void SetTrace(bool b) {  this->Trace = b;}
   // Define a property
   void DefineProperty(const char *name, cmProperty::ScopeType scope,
                       const char *ShortDescription,
@@ -438,6 +441,7 @@ private:
   bool InTryCompile;
   bool ScriptMode;
   bool DebugOutput;
+  bool Trace;
   std::string CMakeEditCommand;
   std::string CMakeCommand;
   std::string CXXEnvironment;

Source/cmakemain.cxx

@@ -101,6 +101,9 @@ static const char * cmDocumentationOptions[][3] =
   {"--debug-output", "Put cmake in a debug mode.",
    "Print extra stuff during the cmake run like stack traces with "
    "message(send_error ) calls."},
+  {"--trace", "Put cmake in trace mode.",
+   "Print a trace of all calls made and from where with "
+   "message(send_error ) calls."},
   {"--help-command cmd [file]", "Print help for a single command and exit.",
    "Full documentation specific to the given command is displayed. "
    "If a file is specified, the documentation is written into and the output "