[CMake] Checking Disk space with Cmake

[avner cohen]

Thank you very much Eric, this defiently helps.
My problem now is that I want my "<your_check_disk_command>" to be a MACRO/FUNCTION if already written in my cmake scripts (rather than running a shell script) is that possible ?

Thanks in advance, 

-Avner.



----- Original Message ----
From: Eric Noulard <eric.noulard at gmail.com>
To: avner cohen <avcoh at yahoo.com>
Cc: cmake at cmake.org
Sent: Tuesday, August 11, 2009 10:16:29 AM
Subject: Re: [CMake] Checking Disk space with Cmake

2009/8/11 avner cohen <avcoh at yahoo.com>:
>
> Hi all,
>
> I'm trying to set a rule/command/somthing, that will be executed with every build (even if cmake files are not touched) to check for DiskSpace available before starting the build.

I think you currently have no mean to ensure that some
command/target/something will be run first, however you can

1) create a custom target

    add_custom_target(CheckDisk  <your_check_disk_command>
                          COMMENT "Check available disk space before build")

2) then add this target as a dependency for ALL other target you add
ADD_LIBRARY, ADD_EXECUTABLE etc...

    add_executable(blah blah.c)
    add_dependencies(blah CheckDisk)

> In case of error, I'd like the build to exit ofcourse.

If the specified <your_check_disk_command> fails the build should stop.
Example project working with a pseudo checkdisk.sh, bash script attached.

Note that add_custom_target may use the ALL option which would force the target
to be run for EVERY build, but I don't know WHEN the target will be launched.

May be CMake developer can tell us when a ALLed add_custom_target will
be run? May be it will be run first if it is the first specified target in the
top level CMakeLists.txt??


-- 
Erk
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