Preserve --compile-no-warning-as-error in automatic CMake re-runs

When the build system re-runs `cmake` to regenerate itself, preserve the
`--compile-no-warning-as-error` option if it was used when `cmake` was
last explicitly invoked.  Normally such settings are preserved in the
cache, but the purpose of this option is to be beyond the reach of
project code.

1 files changed, 4 insertions, 0 deletions

diff --git a/Source/cmLocalVisualStudio7Generator.cxx b/Source/cmLocalVisualStudio7Generator.cxx
index a7ea0df..af0e118 100644
--- a/Source/cmLocalVisualStudio7Generator.cxx
+++ b/Source/cmLocalVisualStudio7Generator.cxx
@@ -262,6 +262,10 @@ cmSourceFile* cmLocalVisualStudio7Generator::CreateVCProjBuildRule()
   cmCustomCommandLines commandLines =
     cmMakeSingleCommandLine({ cmSystemTools::GetCMakeCommand(), argS, argB,
                               "--check-stamp-file", stampName });
+
+  if (cm->GetIgnoreWarningAsError()) {
+    commandLines[0].emplace_back("--compile-no-warning-as-error");
+  }
   std::string comment = cmStrCat("Building Custom Rule ", makefileIn);
   auto cc = cm::make_unique<cmCustomCommand>();
   cc->SetOutputs(stampName);