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-rw-r--r--Source/cmUnsetCommand.cxx59
1 files changed, 59 insertions, 0 deletions
diff --git a/Source/cmUnsetCommand.cxx b/Source/cmUnsetCommand.cxx
new file mode 100644
index 000000000..5c0cfaa03
--- /dev/null
+++ b/Source/cmUnsetCommand.cxx
@@ -0,0 +1,59 @@
+/*============================================================================
+ 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 "cmUnsetCommand.h"
+
+// cmUnsetCommand
+bool cmUnsetCommand::InitialPass(std::vector<std::string> const& args,
+ cmExecutionStatus &)
+{
+ if(args.size() < 1 || args.size() > 2)
+ {
+ this->SetError("called with incorrect number of arguments");
+ return false;
+ }
+
+ const char* variable = args[0].c_str();
+
+ // unset(ENV{VAR})
+ if (!strncmp(variable,"ENV{",4) && strlen(variable) > 5)
+ {
+ // what is the variable name
+ char *envVarName = new char [strlen(variable)];
+ strncpy(envVarName,variable+4,strlen(variable)-5);
+ envVarName[strlen(variable)-5] = '\0';
+
+#ifdef CMAKE_BUILD_WITH_CMAKE
+ cmSystemTools::UnsetEnv(envVarName);
+#endif
+ delete[] envVarName;
+ return true;
+ }
+ // unset(VAR)
+ else if (args.size() == 1)
+ {
+ this->Makefile->RemoveDefinition(variable);
+ return true;
+ }
+ // unset(VAR CACHE)
+ else if ((args.size() == 2) && (args[1] == "CACHE"))
+ {
+ this->Makefile->RemoveCacheDefinition(variable);
+ return true;
+ }
+ // ERROR: second argument isn't CACHE
+ else
+ {
+ this->SetError("called with an invalid second argument");
+ return false;
+ }
+}
+