> On Aug. 10, 2015, 6:42 p.m., Alex Clemmer wrote:
> > 3rdparty/libprocess/3rdparty/CMakeLists.txt, line 77
> > <https://reviews.apache.org/r/37273/diff/2/?file=1036047#file1036047line77>
> >
> >     So, why change the value to `TRUE` here? Is there some consequence of 
> > this, or is it just clearer to you?
> >     
> >     (Also, if we want to go this way, it probably makes sense to change the 
> > `""` we use in the `ExternalProject_Add` calls as well, just for 
> > consistency.)
> 
> haosdent huang wrote:
>     Hmm, because I find
>     
>     ```
>     set(GLOG_CONFIG_CMD  "")
>     ```
>     
>     the visual studio would still execute default configure step which 
> requires CMakeLists.txt .
>     
>     I still don't know why its behaivour would become this here.
> 
> Alex Clemmer wrote:
>     Interesting! What does it say on your machine. On my machine (I will have 
> to confirm this in a minute) I remember it saying that there is "no configure 
> step" for glog. Do you see something different?
> 
> haosdent huang wrote:
>     LoL, I suck on this strange point in serveral hours and try possible ways 
> to skip it. But all of them are failed.
>     If I direct pass "" to ExternalProject_Add, it could skip the 
> configuration step. But I set "" to a variable and pass this variable as 
> configuration step in ExternalProject_Add. It would become try to use default 
> CMake configuration step, which need CMakeLists.txt. I use message to debug 
> the variable and compare the variables with "", I am sure the variable is 
> setted to empty string.
>     
>     My CMake version is 3.3; Visual studio version is 2015 community version; 
> OS is win7; Project code is in a independent disk.
> 
> haosdent huang wrote:
>     I still try to find the reason recently.

When I set(GLOG_CONFIG_CMD ""), the step become this in Visual Studio.

```
<Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Performing 
configure step for 'glog-0.3.3'</Message>
      <Command 
Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">setlocal
cd 
Y:\workspace\cpp\mesos\build\3rdparty\libprocess\3rdparty\glog-0.3.3\src\glog-0.3.3-build
if %errorlevel% neq 0 goto :cmEnd
Y:
if %errorlevel% neq 0 goto :cmEnd
"C:\Program Files (x86)\CMake\bin\cmake.exe" "-GVisual Studio 14 2015" 
Y:/workspace/cpp/mesos/build/3rdparty/libprocess/3rdparty/glog-0.3.3/src/glog-0.3.3
if %errorlevel% neq 0 goto :cmEnd
"C:\Program Files (x86)\CMake\bin\cmake.exe" -E touch 
Y:/workspace/cpp/mesos/build/3rdparty/libprocess/3rdparty/glog-0.3.3/src/glog-0.3.3-stamp/$(Configuration)/glog-0.3.3-configure
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal &amp; call :cmErrorLevel %errorlevel% &amp; goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd</Command>
```


- haosdent


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On Aug. 10, 2015, 9:50 a.m., haosdent huang wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/37273/
> -----------------------------------------------------------
> 
> (Updated Aug. 10, 2015, 9:50 a.m.)
> 
> 
> Review request for mesos and Alex Clemmer.
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Add CMake macro VsBuildCommand in libprocess.
> 
> 
> Diffs
> -----
> 
>   3rdparty/libprocess/3rdparty/CMakeLists.txt 
> 997cc0d0e316e316136d4746e50e9e292a82b36b 
>   3rdparty/libprocess/3rdparty/glog-0.3.3.patch 
> 76b8c0fe3b4615371e265bab713d62c896b7c3d6 
>   3rdparty/libprocess/3rdparty/protobuf-2.5.0.patch PRE-CREATION 
>   3rdparty/libprocess/cmake/ProcessConfigure.cmake 
> 12506a1369de005285268f895f365aba0c560f78 
>   3rdparty/libprocess/cmake/ProcessTestsConfigure.cmake 
> 9e4dcb83a8cc4e95a2a38573944f6b38e2eac76e 
>   3rdparty/libprocess/cmake/macros/VsBuildCommand.bat PRE-CREATION 
>   3rdparty/libprocess/cmake/macros/VsBuildCommand.cmake PRE-CREATION 
> 
> Diff: https://reviews.apache.org/r/37273/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> haosdent huang
> 
>

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