* installing *source* package ‘ROpenCV’ ...
** this is package ‘ROpenCV’ version ‘1.0’
** using staged installation
** libs
using C++ compiler: ‘Debian clang version 19.1.6 (1+b1)’
clang++-19 -std=gnu++17 -I"/home/hornik/tmp/R/include" -DNDEBUG  -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/Rcpp/include' -I'/home/hornik/lib/R/Library/4.5/x86_64-linux-gnu/RcppArmadillo/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 -DR_NO_REMAP -c ROpenCV_types.cpp -o ROpenCV_types.o
In file included from ROpenCV_types.cpp:1:
./ROpenCV_types.h:3:9: warning: 'R_NO_REMAP' macro redefined [-Wmacro-redefined]
    3 | #define R_NO_REMAP
      |         ^
<command line>:4:9: note: previous definition is here
    4 | #define R_NO_REMAP 1
      |         ^
In file included from ROpenCV_types.cpp:1:
./ROpenCV_types.h:12:10: fatal error: 'opencv2/opencv.hpp' file not found
   12 | #include <opencv2/opencv.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~
1 warning and 1 error generated.
make: *** [/home/hornik/tmp/R/etc/Makeconf:202: ROpenCV_types.o] Error 1
ERROR: compilation failed for package ‘ROpenCV’
* removing ‘/srv/hornik/tmp/CRAN_pretest/ROpenCV.Rcheck/ROpenCV’