[CMake] Interfacing cmake with 3rdparties package manager, and exclude them from ninja clean

[Tamás Kenéz]

Maybe executing your script in configure time (execute_process)?

On Fri, Jan 20, 2017 at 4:36 PM, <david.jobet at free.fr> wrote:

> Hello,
>
> I'm working on a project where some of our libs depend on custom build of
> some external libraries.
> Those external libraries are managed through a repository manager similar
> to rpm (redhat package manager) which allows us to retrieve pre-compiled
> versions with related header files. (similar to devel packages)
>
> The catch is we want libraries to be downloaded automatically to a shared
> (multiple users) local dir __AND__ we don't want them to be cleaned.
> (because another user could be using it).
>
> I've tried add_custom_command but files disappear with make clean.
> I've tried to set NO_CUSTOM_CLEAN, that works with make but not with ninja.
>
> I've tried to chain add_custom_target to download the file and
> add_dependencies, again, this works with make but not with ninja (ninja
> does not know how to create protocol buffer compiler "protoc" for example
> since it's not the output of any command he knows)
>
> I've tried externalproject_add with BUILD_BYPRODUCTS but it looks like
> ninja still clean the downloaded files.
>
> Any idea on how to make ninja not clean those downloaded files (we use
> generators like protoc, libraries and header files)
>
> With regards
>
> David
>
> PS : in my add_custom_command/add_custom_target, I invoke "cmake -P" on a
> custom cmake script with 2 args. The first arg is a file to test for
> existence, the second one is the parameter to our custom "rpm" to download
> the package.
>
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