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

[Loaden]

As I know, qmake support /MP on command line builds after set ENV CL=/MP,
and nmake can do parallel builds.
Follow the MS docs:
cl a.cpp b.cpp c.cpp /MP should works well on command line.
Seems CMake does not implements this.
So, can I request a feature for this?

2012/9/21 Bill Hoffman <bill.hoffman at kitware.com>

> nmake does not do parallel builds.  Try using jom.
>
> http://blog.qt.digia.com/2009/**03/27/speeding-up-visual-c-qt-**builds/<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://www.cmake.org/pipermail/cmake/2009-April/028668.html>
>>> http://msdn.microsoft.com/en-**us/library/bb385193.aspx<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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>>>
>>
>>
>
> --
> Bill Hoffman
> Kitware, Inc.
> 28 Corporate Drive
> Clifton Park, NY 12065
> bill.hoffman at kitware.com
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> 518 881-4905 (Direct)
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>
> --
>
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/**
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>
> Please keep messages on-topic and check the CMake FAQ at:
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-- 
Best Regards
Yuchen
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