R devel - Apr 2025 - Help with resolving non-API call warnings in Rust-based packages (ymd and fcl)

Dear R-devel list,


I maintain two packages that use Rust code through the "extendr"
library:
ymd (https://github.com/shrektan/ymd) and fcl (https://github.com/shrektan/fcl)
.
These packages are currently at risk of being removed from CRAN due to calls 
to R's non-API functions.


I've addressed most of these issues by upgrading to "extendr
0.8.0".
When testing with R-win-devel, the packages pass all checks. However,
upon submission to CRAN, I'm facing a confusing situation: the packages
pass checks on Windows but fail on Debian with the following warning:


* checking compiled code ... WARNING
File 'ymd/libs/ymd.so':
  Found '_exit', possibly from '_exit' (C)
    Object: 'rust/target/release/libymd.a'
  Found 'abort', possibly from 'abort' (C)
    Object: 'rust/target/release/libymd.a'
  Found 'exit', possibly from 'exit' (C)
    Object: 'rust/target/release/libymd.a'


I'm not sure if this is still an issue with extendr or if it's a false
warning. I'm particularly puzzled by the discrepancy between Windows and
Debian check results.


Is there an easy way to check against the Debian win-devel server before
resubmitting to ensure these issues are fixed?


For reference, here's the relevant excerpt from CRAN's automated email:


package ymd_0.1.5.tar.gz does not pass the incoming checks automatically,
please see the following pre-tests (additional issue checks):
Windows:
https://win-builder.r-project.org/incoming_pretest/ymd_0.1.5_20250414_114928/Windows/00check.log
Status: OK
Debian:
https://win-builder.r-project.org/incoming_pretest/ymd_0.1.5_20250414_114928/Debian/00check.log
Status: 1 WARNING


Any insights or suggestions would be greatly appreciated.


Best regards,
Xianying Tan (shrektan)
	[[alternative HTML version deleted]]

Please update your Makevars template using the development version of
rextendr.

Please see:
https://github.com/extendr/extendr/releases/tag/extendr-api-v0.8.0

On Mon, Apr 14, 2025 at 18:59 ??? <shrektan at 126.com> wrote:
> Dear R-devel list,
>
>
> I maintain two packages that use Rust code through the "extendr"
library:
> ymd (https://github.com/shrektan/ymd) and fcl (
> https://github.com/shrektan/fcl) .
> These packages are currently at risk of being removed from CRAN due to
> calls
> to R's non-API functions.
>
>
> I've addressed most of these issues by upgrading to "extendr
0.8.0".
> When testing with R-win-devel, the packages pass all checks. However,
> upon submission to CRAN, I'm facing a confusing situation: the packages
> pass checks on Windows but fail on Debian with the following warning:
>
>
> * checking compiled code ... WARNING
> File 'ymd/libs/ymd.so':
>   Found '_exit', possibly from '_exit' (C)
>     Object: 'rust/target/release/libymd.a'
>   Found 'abort', possibly from 'abort' (C)
>     Object: 'rust/target/release/libymd.a'
>   Found 'exit', possibly from 'exit' (C)
>     Object: 'rust/target/release/libymd.a'
>
>
> I'm not sure if this is still an issue with extendr or if it's a
false
> warning. I'm particularly puzzled by the discrepancy between Windows
and
> Debian check results.
>
>
> Is there an easy way to check against the Debian win-devel server before
> resubmitting to ensure these issues are fixed?
>
>
> For reference, here's the relevant excerpt from CRAN's automated
email:
>
>
> package ymd_0.1.5.tar.gz does not pass the incoming checks automatically,
> please see the following pre-tests (additional issue checks):
> Windows:
>
https://win-builder.r-project.org/incoming_pretest/ymd_0.1.5_20250414_114928/Windows/00check.log
> Status: OK
> Debian:
>
https://win-builder.r-project.org/incoming_pretest/ymd_0.1.5_20250414_114928/Debian/00check.log
> Status: 1 WARNING
>
>
> Any insights or suggestions would be greatly appreciated.
>
>
> Best regards,
> Xianying Tan (shrektan)
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>
	[[alternative HTML version deleted]]