[CMake] Predownload

[Craig Scott]

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
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