Error(s) in re-building vignettes:
  ...
--- re-building ‘my-vignette.Rmd’ using rmarkdown
make cmd is
  make -f '/home/hornik/tmp/R.check/r-devel-gcc/Work/build/etc/Makeconf' -f '/home/hornik/tmp/R.check/r-devel-gcc/Work/build/share/make/shlib.mk' -f '/home/hornik/.R/Makevars-gcc' SHLIB_LDFLAGS='$(SHLIB_CXXLDFLAGS)' SHLIB_LD='$(SHLIB_CXXLD)' SHLIB='file235a0f50ff1cfd.so' CXX_DEFS=-DR_NO_REMAP OBJECTS='file235a0f50ff1cfd.o'

make would use
make[1]: Entering directory '/tmp/RtmpnRMek0'
g++-14 -std=gnu++17 -I"/home/hornik/tmp/R.check/r-devel-gcc/Work/build/include" -DNDEBUG   -I"/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/pfr/include/"  -I"/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/Rcpp/include/"  -I"/tmp/RtmpsRqIXl/RLIBS_22f82178035453/RcppEigen/include/"  -I"/tmp/RtmpsRqIXl/RLIBS_22f82178035453/BH/include/"  -DEIGEN_NO_DEBUG  -DDROPPINGTHISINRPACKAGE   -I/usr/local/include -D_FORTIFY_SOURCE=3   -fpic  -g -O2 -Wall -pedantic -mtune=native  -DR_NO_REMAP -c file235a0f50ff1cfd.cpp -o file235a0f50ff1cfd.o
if test  "zfile235a0f50ff1cfd.o" != "z"; then \
  echo g++-14 -std=gnu++17 -shared -L"/home/hornik/tmp/R.check/r-devel-gcc/Work/build/lib" -Wl,-O1 -o file235a0f50ff1cfd.so file235a0f50ff1cfd.o    -L"/home/hornik/tmp/R.check/r-devel-gcc/Work/build/lib" -lR; \
  g++-14 -std=gnu++17 -shared -L"/home/hornik/tmp/R.check/r-devel-gcc/Work/build/lib" -Wl,-O1 -o file235a0f50ff1cfd.so file235a0f50ff1cfd.o    -L"/home/hornik/tmp/R.check/r-devel-gcc/Work/build/lib" -lR; \
fi
make[1]: Leaving directory '/tmp/RtmpnRMek0'

Quitting from lines 181-182 [unnamed-chunk-7] (my-vignette.Rmd)
Error: processing vignette 'my-vignette.Rmd' failed with diagnostics:
                                                     svec::Zero(),
      |                                                                         ~~~~~~~~~~~~~
  150 |                                                                         m_initVar,
      |                                                                         ~~~~~~~~~~
  151 |                                                                         true);
      |                                                                         ~~~~~
/tmp/RtmpsRqIXl/RLIBS_22f82178035453/RcppEigen/include/Eigen/src/Core/CoreEvaluators.h:1071:54: warning: ignoring attributes on template argument ‘Eigen::internal::packet_traits<double>::type’ {aka ‘__m128d’} [-Wignored-attributes]
 1071 |     PacketAlignment = unpacket_traits<PacketScalar>::alignment,
      |                                                      ^~~~~~~~~
make[1]: *** [/home/hornik/tmp/R.check/r-devel-gcc/Work/build/etc/Makeconf:204: file235a0f50ff1cfd.o] Error 1
--- failed re-building ‘my-vignette.Rmd’

SUMMARY: processing the following file failed:
  ‘my-vignette.Rmd’

Error: Vignette re-building failed.
Execution halted