* installing *source* package ‘TreeTools’ ...
** this is package ‘TreeTools’ version ‘1.16.0’
** using staged installation
** libs
using C++ compiler: ‘Debian clang version 19.1.7 (3+b2)’
using C++17
clang++-19 -std=gnu++17 -I"/home/hornik/tmp/R/include" -DNDEBUG  -I'/home/hornik/lib/R/Library/4.6/x86_64-linux-gnu/Rcpp/include' -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3   -fpic  -g -O3 -Wall -pedantic -Wno-missing-template-arg-list-after-template-kw -Wdeprecated-literal-operator  -c ClusterTable.cpp -o ClusterTable.o
In file included from ClusterTable.cpp:1:
./../inst/include/TreeTools/ClusterTable.h:45:12: error: requested alignment is less than minimum alignment of 8 for type 'TreeTools::ClusterTable::ClusterRow'
   45 |     struct alignas(4) ClusterRow {
      |            ^
1 error generated.
make: *** [/home/hornik/tmp/R/etc/Makeconf:209: ClusterTable.o] Error 1
ERROR: compilation failed for package ‘TreeTools’
* removing ‘/srv/hornik/tmp/CRAN_pretest/TreeTools.Rcheck/TreeTools’