cmState: Compute and store directory components.

There is no need to duplicate these in all cmLocalGenerators.

Rename the symbols according to current conventions.

Add explicit calls to Set{Source,Binary}Directory with empty strings
in order to trigger the population of the components containers with
the current working directory in cmLocalGenerator.  Having
directories set to empty is a special case in CMake, which is relied
on for the `if(CMAKE_BINARY_DIR)` condition at the end of
CMakeDetermineSystem.cmake.

1 files changed, 2 insertions, 0 deletions

diff --git a/Source/cmGraphVizWriter.cxx b/Source/cmGraphVizWriter.cxx
index 99542a9..bffcb7c 100644
--- a/Source/cmGraphVizWriter.cxx
+++ b/Source/cmGraphVizWriter.cxx
@@ -65,6 +65,8 @@ void cmGraphVizWriter::ReadSettings(const char* settingsFileName,
                                     const char* fallbackSettingsFileName)
 {
   cmake cm;
+  cm.SetHomeDirectory("");
+  cm.SetHomeOutputDirectory("");
   cmGlobalGenerator ggi;
   ggi.SetCMakeInstance(&cm);
   cmsys::auto_ptr<cmLocalGenerator> lg(ggi.CreateLocalGenerator());