1 files changed, 57 insertions, 0 deletions
diff --git a/Source/cmOptionCommand.cxx b/Source/cmOptionCommand.cxx
new file mode 100644
index 0000000..f6f0ec3
--- /dev/null
+++ b/Source/cmOptionCommand.cxx
@@ -0,0 +1,57 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+#include "cmOptionCommand.h"
+
+// cmOptionCommand
+bool cmOptionCommand::InitialPass(std::vector<std::string> const& args,
+                                  cmExecutionStatus&)
+{
+  bool argError = false;
+  if (args.size() < 2) {
+    argError = true;
+  }
+  // for VTK 4.0 we have to support the option command with more than 3
+  // arguments if CMAKE_MINIMUM_REQUIRED_VERSION is not defined, if
+  // CMAKE_MINIMUM_REQUIRED_VERSION is defined, then we can have stricter
+  // checking.
+  if (this->Makefile->GetDefinition("CMAKE_MINIMUM_REQUIRED_VERSION")) {
+    if (args.size() > 3) {
+      argError = true;
+    }
+  }
+  if (argError) {
+    std::string m = "called with incorrect number of arguments: ";
+    m += cmJoin(args, " ");
+    this->SetError(m);
+    return false;
+  }
+
+  std::string initialValue = "Off";
+  // Now check and see if the value has been stored in the cache
+  // already, if so use that value and don't look for the program
+  cmState* state = this->Makefile->GetState();
+  const char* existingValue = state->GetCacheEntryValue(args[0]);
+  if (existingValue) {
+    if (state->GetCacheEntryType(args[0]) != cmState::UNINITIALIZED) {
+      state->SetCacheEntryProperty(args[0], "HELPSTRING", args[1]);
+      return true;
+    }
+    initialValue = existingValue;
+  }
+  if (args.size() == 3) {
+    initialValue = args[2];
+  }
+  bool init = cmSystemTools::IsOn(initialValue.c_str());
+  this->Makefile->AddCacheDefinition(args[0], init ? "ON" : "OFF",
+                                     args[1].c_str(), cmState::BOOL);
+  return true;
+}