[Cmake] Configuring a subdirectory with CMake

[William A. Hoffman]

There is a very easy way to do this.

At the top of each application in InsightApplications that
can not be built outside the InsightApplications tree, do this:

IF(NOT InsightApplications_SOURCE_DIR)
   MESSAGE(FATAL_ERROR "This project must be built as part of InsightApplications")
ENDIF(NOT InsightApplications_SOURCE_DIR)


-Bill


At 09:30 AM 7/28/2004, Miller, James V (Research) wrote:
>There seems to be a common trend in users building the InsightApplications
>project where they try to run cmake within a
>subdirectory to try to configure just that application.  The
>InsightApplications cmake configurations are not setup to allow a 
>user to configure a subdirectory without configuring the root directory.
>
>We may have the same issue in the example directories in Insight.
>
>To date, we have been treating this as a training problem. Telling users
>they need to run cmake from the root directory and use the cmake
>configuration tools to select the subdirectories they want to build
>(for the cases where we have a setting to turn on/off a subdirectory).
>
>Is there a way in CMake, that we can place something in a subdirectories
>CMakeLists.txt file such that if cmake is run on that CMakeLists.txt 
>file without running from the root directory, that we can warn the 
>user.
>
>Maybe it is something as simple as: if the first CMakeLists.txt file
>processed by CMake does not have a PROJECT() line, then CMake issues a 
>warning saying the project is missing a PROJECT() line or the user is 
>configuring from a non-root directory.
>
>Or maybe a command can be added to CMake, something like SUBPROJECT(),
>that would indicate that this directory and its subdirectories are 
>dependent on information from a root directory.  If CMake sees a 
>SUBPROJECT() call before a PROJECT() call, then it issues a warning.
>
>We could handle this within the CMakeLists.txt files for the project
>directly, setting a variable in the root CMakeLists.txt file and 
>checking that variable in the other CMakeLists.txt and issuing a 
>warning as appropriate.  But this would add quite a few lines to 
>every CMakeLists.txt file in the project.
>
>Any other suggestions?  
>
>Jim
>
>
>-----Original Message-----
>From: Luis Ibanez [mailto:luis.ibanez at kitware.com]
>Sent: Tuesday, July 27, 2004 10:35 PM
>To: Huss
>Cc: insight-users at itk.org
>Subject: Re: [Insight-users] Building Insight Applications
>
>
>
>Hi Huss,
>
>Your messaage is not clear.
>
>1) First you say that you configured and build InsightApplications-1.6.0,
>
>2) Then you say that you are confused about how to build
>     MultiResMIregistration  under InsightApplications-1.6.0.
>
>If you already build InsightApplications-1.6.0, then the application
>MulitResMIregistration should have been build as part of the build
>of the entire package.
>
>It seems that you are making the common mistake of trying to configure
>an individual application.  Don't do that, you must configure the
>applications from the top directory InsightApplications.
>
>Then, if you want to build only one of the applications, you go in the
>specific subdirectory of that application and type make (if you are
>in Unix).  If you are in Windows, you load the generic .dsw and
>select which project to build from inside the visual studio IDE.
>
>
>You run this application in the command line, like
>
>    ./MultiResMIRegistration    BrainWebT1toT2b.txt
>
>These applications do  not have GUIs you cannot run them
>by double-clickin on their icons.
>
>
>
>   Regards,
>
>
>
>--------------------------------------------------------------------
>Huss wrote:
>
>>Hello Insight Users,
>>
>>I was able to successfully configure and buiId the
>>InsightApplications-1.6.0. But I am confused as to how  to build
>>MultiResMIregisteration under InsightApplications-1.6.0.
>>If I have to configure it what should be my source and binary directory. 
>>
>>Also, I went over the READ Me file in source code directory and i made
>>the parameter file which has to be passed as an argument. I am also
>>confused as to where do I specify which file has to be passed in?
>>
>>Thanks for your help
>>Huss
>>_______________________________________________
>>Insight-users mailing list
>>Insight-users at itk.org
>>http://www.itk.org/mailman/listinfo/insight-users
>>
>>  
>>
>
>
>
>
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