Found the following significant warnings:
  dfa.cpp:155:9: warning: using integer absolute value function 'abs' when argument is of floating point type [-Wabsolute-value]
See ‘/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/fractalRegression.Rcheck/00install.out’ for details.
* used C++ compiler: ‘Debian clang version 18.1.7 (1)’
installed size is  5.5Mb
  sub-directories of 1Mb or more:
    libs   5.1Mb
installed size is  5.6Mb
  sub-directories of 1Mb or more:
    libs   5.3Mb
installed size is  5.4Mb
  sub-directories of 1Mb or more:
    libs   5.1Mb
installed size is  5.6Mb
  sub-directories of 1Mb or more:
    libs   5.3Mb

Found the following significant warnings:
  rb_fast.cpp:160:8: warning: using integer absolute value function 'abs' when argument is of floating point type [-Wabsolute-value]
See ‘/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/mlrv.Rcheck/00install.out’ for details.
* used C++ compiler: ‘Debian clang version 18.1.7 (1)’
installed size is  6.0Mb
  sub-directories of 1Mb or more:
    libs   5.7Mb
installed size is  6.1Mb
  sub-directories of 1Mb or more:
    libs   5.9Mb
installed size is  6.0Mb
  sub-directories of 1Mb or more:
    libs   5.7Mb
installed size is  6.1Mb
  sub-directories of 1Mb or more:
    libs   5.9Mb

installed size is  5.3Mb
  sub-directories of 1Mb or more:
    libs   5.1Mb
installed size is  5.4Mb
  sub-directories of 1Mb or more:
    libs   5.2Mb
installed size is  5.5Mb
  sub-directories of 1Mb or more:
    libs   5.3Mb
installed size is  5.4Mb
  sub-directories of 1Mb or more:
    libs   5.2Mb

Installation failed.
See ‘/Volumes/Builds/packages/big-sur-arm64/results/4.4/MPCR.Rcheck/00install.out’ for details.
Installation failed.
See ‘/Volumes/Builds/packages/big-sur-arm64/results/4.3/MPCR.Rcheck/00install.out’ for details.

Package suggested but not available for checking: ‘NPRED’
Package suggested but not available for checking: ‘NPRED’
Packages suggested but not available for checking: 'NPRED', 'synthesis'
Namespace in Imports field not imported from: ‘rlang’
  All declared Imports should be used.
Error(s) in re-building vignettes:
--- re-building ‘WASP.Rmd’ using rmarkdown

Quitting from lines 33-43 [packages] (WASP.Rmd)
Error: processing vignette 'WASP.Rmd' failed with diagnostics:
there is no package called 'synthesis'
--- failed re-building ‘WASP.Rmd’

SUMMARY: processing the following file failed:
  ‘WASP.Rmd’

Error: Vignette re-building failed.
Execution halted
Packages suggested but not available for checking: 'NPRED', 'synthesis'
Namespace in Imports field not imported from: ‘rlang’
  All declared Imports should be used.
Error(s) in re-building vignettes:
--- re-building ‘WASP.Rmd’ using rmarkdown

Quitting from lines 33-43 [packages] (WASP.Rmd)
Error: processing vignette 'WASP.Rmd' failed with diagnostics:
there is no package called 'synthesis'
--- failed re-building ‘WASP.Rmd’

SUMMARY: processing the following file failed:
  ‘WASP.Rmd’

Error: Vignette re-building failed.
Execution halted
Package suggested but not available for checking: ‘NPRED’
Package suggested but not available for checking: ‘NPRED’
Package suggested but not available for checking: ‘NPRED’