cmMakefile: Port nested error logic away from cmExecutionStatus

It is no longer needed.

Source/cmExecutionStatus.h

@@ -38,16 +38,12 @@ public:
     this->ReturnInvoked = false;
     this->BreakInvoked = false;
     this->ContinueInvoked = false;
-    this->NestedError = false;
   }
-  void SetNestedError(bool val) { this->NestedError = val; }
-  bool GetNestedError() { return this->NestedError; }
 
 private:
   bool ReturnInvoked;
   bool BreakInvoked;
   bool ContinueInvoked;
-  bool NestedError;
 };
 
 #endif

Source/cmFunctionCommand.cxx

@@ -76,7 +76,7 @@ public:
 };
 
 bool cmFunctionHelperCommand::InvokeInitialPass(
-  const std::vector<cmListFileArgument>& args, cmExecutionStatus& inStatus)
+  const std::vector<cmListFileArgument>& args, cmExecutionStatus&)
 {
   // Expand the argument list to the function.
   std::vector<std::string> expandedArgs;
@@ -129,11 +129,11 @@ bool cmFunctionHelperCommand::InvokeInitialPass(
   for (unsigned int c = 0; c < this->Functions.size(); ++c) {
     cmExecutionStatus status;
     if (!this->Makefile->ExecuteCommand(this->Functions[c], status) ||
-        status.GetNestedError()) {
+        (cmSystemTools::GetErrorOccuredFlag() &&
+         !cmSystemTools::GetFatalErrorOccured())) {
       // The error message should have already included the call stack
       // so we do not need to report an error here.
       functionScope.Quiet();
-      inStatus.SetNestedError(true);
       return false;
     }
     if (status.GetReturnInvoked()) {

Source/cmMacroCommand.cxx

@@ -159,11 +159,11 @@ bool cmMacroHelperCommand::InvokeInitialPass(
     }
     cmExecutionStatus status;
     if (!this->Makefile->ExecuteCommand(newLFF, status) ||
-        status.GetNestedError()) {
+        (cmSystemTools::GetErrorOccuredFlag() &&
+         !cmSystemTools::GetFatalErrorOccured())) {
       // The error message should have already included the call stack
       // so we do not need to report an error here.
       macroScope.Quiet();
-      inStatus.SetNestedError(true);
       return false;
     }
     if (status.GetReturnInvoked()) {

Source/cmMakefile.cxx

@@ -115,10 +115,6 @@ cmMakefile::~cmMakefile()
 void cmMakefile::IssueMessage(cmake::MessageType t,
                               std::string const& text) const
 {
-  assert(!this->ExecutionStatusStack.empty());
-  if ((t == cmake::FATAL_ERROR) || (t == cmake::INTERNAL_ERROR)) {
-    this->ExecutionStatusStack.back()->SetNestedError(true);
-  }
   this->GetCMakeInstance()->IssueMessage(t, text, this->GetBacktrace());
 }
 
@@ -279,11 +275,19 @@ bool cmMakefile::ExecuteCommand(const cmListFileFunction& lff,
       if (this->GetCMakeInstance()->GetTrace()) {
         this->PrintCommandTrace(lff);
       }
-      // Try invoking the command.
+
+      bool hadPreviousNonFatalError = cmSystemTools::GetErrorOccuredFlag() &&
+        !cmSystemTools::GetFatalErrorOccured();
+      cmSystemTools::ResetErrorOccuredFlag();
+
       bool invokeSucceeded = pcmd->InvokeInitialPass(lff.Arguments, status);
-      bool hadNestedError = status.GetNestedError();
+      bool hadNestedError = cmSystemTools::GetErrorOccuredFlag() &&
+        !cmSystemTools::GetFatalErrorOccured();
+      if (hadPreviousNonFatalError) {
+        cmSystemTools::SetErrorOccured();
+      }
       if (!invokeSucceeded || hadNestedError) {
-        if (!hadNestedError) {
+        if (!hadNestedError && !cmSystemTools::GetFatalErrorOccured()) {
           // The command invocation requested that we report an error.
           this->IssueMessage(cmake::FATAL_ERROR, pcmd->GetError());
         }