[CMake] 'NMake Makefiles' generate does not support parallel builds (/MP)?

[Andreas Haferburg]

Hi Yuchen,

we're using the same way to enable /MP, and it works for us. You didn't say exactly what doesn't 
work, so I'm left to guessing.

Have you checked in Visual Studio if the flag is set (Project properties->C/C++->Command Line)? 
Maybe there's a conflicting option enabled? Or maybe you're changing the CMAKE_CXX_FLAGS variable 
too late, e.g. after calling add_executable()?

Have you checked the value in Tools->Options->Projects and Solutions->VC++ Project Settings->Maximum 
...

Best regards,
Andreas


On 20.09.2012 10:45, Loaden wrote:
> Hi, there!
> I am using Windows SDK 7.1 + nmake + CMake for building Windows applications.
> Follow these:
> http://www.cmake.org/pipermail/cmake/2009-April/028668.html
> http://msdn.microsoft.com/en-us/library/bb385193.aspx
> I can't make /MP option works after this change in CMake's main CMakeLists.txt
>
>     if (MSVC)
>        SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
>        SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /MP")
>        message(STATUS "CMAKE_CXX_FLAGS = ${CMAKE_CXX_FLAGS}")
>        message(STATUS "CMAKE_C_FLAGS = ${CMAKE_C_FLAGS}")
>     endif()
>
>
> I know Jom which is a good choice for speed up compilation, but some times, it will broken my builds.
> See: http://qt-project.org/wiki/jom
>
> Am I lost some option? does there exist an valid way?
> or, It's just a bug from CMake self?
> Thanks a lot!
>
> --
> Best Regards
> Yuchen
>
>
>
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