Use HECL_MULTIPROCESSOR macro for enabling multithreaded work

hecl/CMakeLists.txt

@@ -2,6 +2,7 @@ if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
 cmake_minimum_required(VERSION 3.0)
 project(hecl)
 if(MSVC)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHsc")
   # Shaddup MSVC
   add_definitions(-DUNICODE=1 -D_UNICODE=1 -D_CRT_SECURE_NO_WARNINGS=1 /wd4267 /wd4244)
 else()

hecl/lib/CMakeLists.txt

@@ -20,6 +20,10 @@ atdna(atdna_Frontend.cpp ../include/hecl/Frontend.hpp)
 atdna(atdna_Runtime.cpp ../include/hecl/Runtime.hpp)
 atdna(atdna_CVar.cpp ../include/hecl/CVar.hpp)
 
+if("${CMAKE_BUILD_TYPE}" STREQUAL "Release" OR "${CMAKE_BUILD_TYPE}" STREQUAL "RelWithDebInfo")
+  add_definitions(-DHECL_MULTIPROCESSOR)
+endif()
+
 add_library(hecl-common
             ${BLENDER_SOURCES}
             ${BACKEND_SOURCES}

hecl/lib/ClientProcess.cpp

@@ -102,8 +102,8 @@ void ClientProcess::Worker::proc()
 ClientProcess::ClientProcess(int verbosityLevel)
 : m_verbosity(verbosityLevel)
 {
-#if defined(NDEBUG)
-    int cpuCount = GetCPUCount();
+#ifdef HECL_MULTIPROCESSOR
+    const int cpuCount = GetCPUCount();
 #else
     constexpr int cpuCount = 1;
 #endif