compile time improved on MSVC with /MP flag

PDAL · May 31, 2013 · 7197051 · 7197051
1 parent cb86468
commit 7197051
Showing 1 changed file with 13 additions and 1 deletion.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -151,7 +151,19 @@ if(WIN32)
     else()
       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
     endif()
-  endif()
+
+    if(MSVC90 OR MSVC10 OR MSVC11)
+      if (NOT ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}.${CMAKE_PATCH_VERSION} LESS 2.8.6)
+        include(ProcessorCount)
+        ProcessorCount(N)
+        if(NOT N EQUAL 0)
+          set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   /MP${N}")
+  	      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP${N}")
+        endif()
+      endif()
+    endif()
+
+  endif(MSVC)
 
   set(CMAKE_INCLUDE_PATH c:/osgeo4w/include;$ENV{CMAKE_INCLUDE_PATH})
   set(CMAKE_LIBRARY_PATH c:/osgeo4w/lib;$ENV{CMAKE_LIBRARY_PATH})