From 017cec95ada69369e3959cc9c09248335ea2dbfa Mon Sep 17 00:00:00 2001
From: Bill Hoffman <bill.hoffman@kitware.com>
Date: Fri, 6 Oct 2006 11:11:59 -0400
Subject: ENH: do not print a call stack if the user does a message error
 unless --debug-output is used

---
 Source/cmMessageCommand.cxx | 17 ++++++++++++++---
 Source/cmake.cxx            |  6 ++++++
 Source/cmake.h              |  6 +++++-
 Source/cmakemain.cxx        |  3 +++
 4 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/Source/cmMessageCommand.cxx b/Source/cmMessageCommand.cxx
index 7ab17fb..266bcf8 100644
--- a/Source/cmMessageCommand.cxx
+++ b/Source/cmMessageCommand.cxx
@@ -59,8 +59,14 @@ bool cmMessageCommand::InitialPass(std::vector<std::string> const& args)
 
   if (send_error || fatal_error)
     {
-    //cmSystemTools::Error(message.c_str());
-    this->SetError(message.c_str());
+    if( !this->Makefile->GetCMakeInstance()->GetDebugOutput())
+      {
+      cmSystemTools::Error(message.c_str());
+      }
+    else
+      {
+      this->SetError(message.c_str());
+      }
     }
   else
     {
@@ -77,6 +83,11 @@ bool cmMessageCommand::InitialPass(std::vector<std::string> const& args)
     {
     cmSystemTools::SetFatalErrorOccured();
     }
-  return (!send_error && !fatal_error);
+  // if debug is on then retru
+  if(this->Makefile->GetCMakeInstance()->GetDebugOutput())
+    {
+    return (!send_error && !fatal_error);
+    }
+  return true;
 }
 
diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index 8636aa0..c1ca881 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -111,6 +111,7 @@ void cmNeedBackwardsCompatibility(const std::string& variable,
 
 cmake::cmake()
 {
+  this->DebugOutput = false;
   this->DebugTryCompile = false;
   this->ClearBuildSystem = false;
   this->FileComparison = new cmFileTimeComparison;
@@ -446,6 +447,11 @@ void cmake::SetArgs(const std::vector<std::string>& args)
       std::cout << "debug trycompile on\n";
       this->DebugTryCompileOn();
       }
+    else if(arg.find("--debug-output",0) == 0)
+      {
+      std::cout << "Running with debug output on.\n";
+      this->DebugOutputOn();
+      }
     else if(arg.find("-G",0) == 0)
       {
       std::string value = arg.substr(2);
diff --git a/Source/cmake.h b/Source/cmake.h
index d63cf7e..643dfec 100644
--- a/Source/cmake.h
+++ b/Source/cmake.h
@@ -281,6 +281,9 @@ class cmake
   const char* GetCPackCommand();
   const char* GetCMakeCommand() { return this->CMakeCommand.c_str(); }
 
+  // Do we want debug output during the cmake run.
+  bool GetDebugOutput() { return this->DebugOutput; }
+  void DebugOutputOn() { this->DebugOutput = true;}
 protected:
   typedef cmGlobalGenerator* (*CreateGeneratorFunctionType)();
   typedef std::map<cmStdString,
@@ -326,13 +329,14 @@ protected:
   static int ExecuteLinkScript(std::vector<std::string>& args);
   
   cmVariableWatch* VariableWatch;
-
+  
 private:
   ProgressCallbackType ProgressCallback;
   void* ProgressCallbackClientData;
   bool Verbose;
   bool InTryCompile;
   bool ScriptMode;
+  bool DebugOutput;
   std::string CMakeCommand;
   std::string CXXEnvironment;
   std::string CCEnvironment;
diff --git a/Source/cmakemain.cxx b/Source/cmakemain.cxx
index 1a5d2db..f183ae2 100644
--- a/Source/cmakemain.cxx
+++ b/Source/cmakemain.cxx
@@ -85,6 +85,9 @@ static const cmDocumentationEntry cmDocumentationOptions[] =
   {"--debug-trycompile", "Do not delete the try compile directories..",
    "Do not delete the files and directories created for try_compile calls. "
    "This is useful in debugging failed try_compiles."},
+  {"--debug-output", "Put cmake in a debug mode.",
+   "Print extra stuff during the cmake run like stack traces 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."},
   {"--help-command-list [file]", "List available listfile commands and exit.",
-- 
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