VS10: Fix working directory of consecutive custom commands (#11938)

The VS 10 msbuild tool uses a single command shell to invoke all the
custom command scripts in a project.  Isolate the environment and
working directory of custom commands using setlocal/endlocal.  The
form of each command is

  set errlev=
  setlocal
  cd c:\work\dir
  if %errorlevel% neq 0 goto :cmEnd
  c:
  if %errorlevel% neq 0 goto :cmEnd
  command1 ...
  if %errorlevel% neq 0 goto :cmEnd
  ...
  commandN ...
  if %errorlevel% neq 0 goto :cmEnd
  :cmEnd
  endlocal & set errlev=%errorlevel%
  if %errlev% neq 0 goto :VCEnd

so that all changes to the environment and working directory are
isolated within the script and the return code is preserved.

1 files changed, 4 insertions, 5 deletions

diff --git a/Source/cmLocalVisualStudioGenerator.h b/Source/cmLocalVisualStudioGenerator.h
index 22112b317d..278291e90a 100644
--- a/Source/cmLocalVisualStudioGenerator.h
+++ b/Source/cmLocalVisualStudioGenerator.h
@@ -37,13 +37,12 @@ public:
                               const char* configName,
                               const char* newline = "\n");
 
-  /** Line of batch file text that skips to the end after
-    * a failed step in a sequence of custom commands.
-    */
-  std::string GetCheckForErrorLine();
+  /** Label to which to jump in a batch file after a failed step in a
+      sequence of custom commands. */
+  const char* GetReportErrorLabel() const;
 
 protected:
-  virtual std::string CheckForErrorLine();
+  virtual const char* ReportErrorLabel() const;
 
   /** Construct a custom command to make exe import lib dir.  */
   cmsys::auto_ptr<cmCustomCommand>