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

[Bill Hoffman]

nmake does not do parallel builds.  Try using jom.

http://blog.qt.digia.com/2009/03/27/speeding-up-visual-c-qt-builds/
http://qt-project.org/wiki/jom


/MP only works from the VS IDE.


On 9/20/2012 11:34 AM, Andreas Haferburg wrote:
> 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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>


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