[CMake] Predownload

[Craig Scott]

Actually, ExternalProject could even be used to download and unpack the
toolchain files in a superbuild arrangement too. Probably makes more sense
now that I think about it, since it provides unpacking as well, not just
downloading and has a much richer set of download methods.

On Tue, Apr 18, 2017 at 8:16 AM, Craig Scott <craig.scott at crascit.com>
wrote:

> One option may be a superbuild arrangement (based on ExternalProject,
> online searches should give you details). The only thing the top level
> would do is setup the sub builds, including downloading and selecting which
> toolchain(s) to use for each sub build.
>
>
> On Tue, Apr 18, 2017 at 8:03 AM, Florent Castelli <
> florent.castelli at gmail.com> wrote:
>
>> It is possible.
>>
>> Nothing prevents you from calling execute_process to download as extract
>> your toolchain file when it is run. You probably want to check the
>> destination folder for a pre existing download though.
>>
>
>
> If you use file(DOWNLOAD...) for downloading the toolchain files and you
> specify an EXPECTED_HASH, this will also conveniently take care of only
> downloading the file if it isn't already present. Shouldn't need to resort
> to execute_process() to do the download.
>
>
>
> Then, you proceed on configuring Cmake to use it as usual.
>>
>> /Florent
>>
>> On Apr 17, 2017 14:11, "Zabel, Oliver" <oliverzabel at gmx.de> wrote:
>>
>> Hi,
>>
>>
>>
>> i’m developing Software for embedded Systems and my applications Need to
>> run on different target platforms. Until now we are build our Code with
>> make but i’d like to Switch to cmake. ATM we’re putting our Compiler
>> toolchains in our VCS to be able to produce the same binarys even after
>> years. Until now, there is only one toolchain include in a Project as
>> svn-external/git submodule. But i want to use toolchain-files with cmake.
>>
>>
>>
>> Now here is my idea and i’d like to know whether this is possible with
>> cmake.
>>
>> I have my Project root and in this Folder i’d like to have different
>> toolchain files for different Compilers. I’d like to exclude the Compilers
>> as external.
>>
>> Now i’d like to build the cmake Cache by calling cmake with the required
>> toolchain file. Is it now somehow possible, to download the required
>> toolchain before the Cache is buidl up? If this would be possible, i could
>> dynamicly choose which toolchain i want to have – would be great for
>> Compiler / unit Tests as well.
>>
>>
>>
>> Perhaps someone has a better idea to do this or even i using such a
>> System and give me a hint?
>>
>>
>>
>> Thanks a lot!
>>
>>
>>
>> Best regards,
>>
>> Oliver
>>
>> --
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>
>
>
> --
> Craig Scott
> Melbourne, Australia
> https://crascit.com
>



-- 
Craig Scott
Melbourne, Australia
https://crascit.com
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