[PATCH] [libcxx] Use better prefix for macro indicating a shared DLL build

[Nico Rieck]

On 24.10.2013 19:46, Reid Kleckner wrote:
> Should this be behind the LIBCXX_ENABLE_SHARED conditional?

CMake docs state that DEFINE_SYMBOL defines the symbol when compiling a 
shared library. I just tested that this is indeed the case, so there's 
no need to make it conditional.

-Nico