Wayland McWayface tutorial project done, feedback on jextract

Mark Hammons mark.hammons at inaf.cnrs-gif.fr
Mon Mar 4 20:33:39 UTC 2019


Thanks, I'll look forward to it! On a side note, I've released a new 
version of my project that finally has the sbt jextract integration 
working properly. It turns out that the -C parameter didn't like the 
quotes I was putting around "-DWLR_USE_UNSTABLE" and not recognizing the 
option, so that option wasn't being passed to clang, and clang won't 
work with this version of wlroots unless that option is passed. I found 
this out when I reimplemented the functionality using scala's process 
api instead of the toolprovider api. Still not sure why the tool 
provider wasn't printing that error message but oh well.

On 3/4/19 12:01 PM, Maurizio Cimadamore wrote:
>
> On 04/03/2019 10:26, Mark Hammons wrote:
>> One last question. As I mention in my readme, I've written a binding 
>> for stdlib's setenv function in scala as opposed to getting jextract 
>> to generate it for me (because of the concerns I voiced before). It's 
>> in the package usr.include in the scala source code. Is it necessary 
>> that I define the header file at all in these bindings? I'd imagine 
>> I'd normally have to include the library to link against (but it's 
>> not necessary since it's part of libc), but if I can leave out the 
>> header annotation it's easier to make semi-platform independent 
>> bindings like what I could do with jnr. 
>
> Two answers here. In the long run, it is very likely that, as Panama 
> gets mature, we'll start seeing 'official' stdlib and/or posix Java 
> libraries (maybe in the JDK, maybe not).
>
> Another answer - it will eventually be possible to go 'lower level' 
> and obtain method handles to model native function calls 
> programmatically, w/o necessarily going through an annotated 
> interface, using just the Layout API. I will share more on that story 
> at a later point, but stay tuned.
>
> Maurizio
>
>
>


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