[csolution] intdir: solution level intermediate directory is needed for multi-context CMakelists

[brondani]

In the multi-context scenario a solution level intermediate directory is needed.
By default it could be the top level tmp directory already defined in the intdir specification.
How intdir should be evaluated when it is customized, in particular concerning context specific access sequences?
Should we change or restrict the rules concerning its customization?

[ReinhardKeil]

It this really required? I would suggest to clarify the behavior of access sequences. It could be:

$cmse-lib(Myproject)$ is only permitted when --context-set is used. When applying the Rules for Context-Set this would give only one valid context that translates to a full specified context.

Without --context-set for such access sequences a fully qualified context must be specified. Would this work?

[ReinhardKeil]

The direct CMake flow:

• requires a top-level intdir
• does not allow to specify intdir at cproject.yml level.

A potential solution is to only allow to specify intdir at the level of csolution.yml.

[ReinhardKeil]

Current situation

output-dirs: is only allowed at *.csolution.yml level. Only the option to use Access Sequences for intdir: needs to be removed from the documentation.

Is this correct?

[brondani]

output-dirs: is only allowed at *.csolution.yml level. Only the option to use Access Sequences for intdir: needs to be removed from the documentation.

Is this correct?

Your understanding is correct, however it is not only a matter of documentation. Removing the Access Sequences evaluation would be an incompatible breaking change. This is certainly a possible solution but it requires a major version increment.

[ReinhardKeil]

In case of Access sequences in intdir:, the proposal is to just issue an warning.

Note: that this restriction is caused by the fact that the native CMake dependency check does not allow this level of control. Personally, I'm not aware of a usecase where the user needs fine control of the temp directory layout.

[brondani]

Solved by #1607.