Re: issue with meson and recursion: negation missing in add?

[Philippe Mathieu-Daudé]

On 2/27/21 11:23 PM, Claudio Fontana wrote:
> Hi Paolo,
> 
> I don't know how to handle an issue in the current way we are using meson 
> with recursion, ie always recursing,
> and testing multiple options inside the recursed directory.
> 
> In the case of ARM, we have:
> 
> target/arm/tcg/meson.build,
> 
> where I need to check all the time for TCG, given our current standard of 
> always recursing.
> 
> Besides being error-prone to always remember to check for CONFIG_TCG,
> 
> how do I add some object conditionally on whether CONFIG_TCG is true, but 
> TARGET_AARCH64 is false?
> 
> I'd need something like:
> 
> arm_ss.add(when: [!TARGET_AARCH64,'CONFIG_TCG'], if_true: files(
>   'tcg-cpu-models.c',
> ))
> 
> but the negation !TARGET_AARCH64 is a syntax error... is there any way to 
> negate the condition?

Funny, I asked Paolo the same question last week on IRC, but:

- I also included TARGET_SIZE in the when:
- your email is clearer than my questions :)

> 
> Also as we nest directories more and more, it seems to me that this becomes 
> more and more confusing.
> 
> How about dropping the idea to recurse always unconditionally?
> 
> Thanks!
> 
> Claudio
> 
>