[vtk-developers] Bump CMake to 2.8.7 for check_cxx_symbol_exists()

[David Gobbi]

Hi All,

I want to use the check_cxx_symbol_exists() macro, but that would mean
bumping VTK's required version of CMake (it's at 2.8.5 now).  If cmake
is bumped to 2.8.7, then DASH11 is the only dashboard machine that
will have to be updated.

The difference between check_cxx_symbol_exists() and the older
check_symbol_exists() macro (the one that VTK uses currently) is that
the former does the check with the C++ compiler, while the latter does
the check with the C compiler.  VTK is C++, and we cannot assume that
all symbols defined for the C compiler are also defined for C++.

 - David