* installing *source* package ‘gifski’ ...
** using staged installation
Using /usr/bin/cargo
Rustc version: rustc 1.80.1
** libs
using C compiler: ‘Debian clang version 18.1.8 (11)’
clang-18  -I"/home/hornik/tmp/R-d-clang-18/include" -DNDEBUG   -I/usr/local/include -DUSE_TYPE_CHECKING_STRICT -D_FORTIFY_SOURCE=3 -DSTRICT_R_HEADERS=1 -pthread -fvisibility=hidden -fpic  -g -O3 -Wall -pedantic -c wrapper.c -o wrapper.o
wrapper.c:2:9: warning: 'STRICT_R_HEADERS' macro redefined [-Wmacro-redefined]
    2 | #define STRICT_R_HEADERS
      |         ^
<command line>:4:9: note: previous definition is here
    4 | #define STRICT_R_HEADERS 1
      |         ^
wrapper.c:17:1: error: unknown type name 'SEXP'
   17 | SEXP R_png_to_gif(SEXP png_files, SEXP gif_file, SEXP width, SEXP height, SEXP delay, SEXP repeats, SEXP progress){
      | ^
wrapper.c:17:19: error: unknown type name 'SEXP'
   17 | SEXP R_png_to_gif(SEXP png_files, SEXP gif_file, SEXP width, SEXP height, SEXP delay, SEXP repeats, SEXP progress){
      |                   ^
wrapper.c:17:35: error: unknown type name 'SEXP'
   17 | SEXP R_png_to_gif(SEXP png_files, SEXP gif_file, SEXP width, SEXP height, SEXP delay, SEXP repeats, SEXP progress){
      |                                   ^
wrapper.c:17:50: error: unknown type name 'SEXP'
   17 | SEXP R_png_to_gif(SEXP png_files, SEXP gif_file, SEXP width, SEXP height, SEXP delay, SEXP repeats, SEXP progress){
      |                                                  ^
wrapper.c:17:62: error: unknown type name 'SEXP'
   17 | SEXP R_png_to_gif(SEXP png_files, SEXP gif_file, SEXP width, SEXP height, SEXP delay, SEXP repeats, SEXP progress){
      |                                                              ^
wrapper.c:17:75: error: unknown type name 'SEXP'
   17 | SEXP R_png_to_gif(SEXP png_files, SEXP gif_file, SEXP width, SEXP height, SEXP delay, SEXP repeats, SEXP progress){
      |                                                                           ^
wrapper.c:17:87: error: unknown type name 'SEXP'
   17 | SEXP R_png_to_gif(SEXP png_files, SEXP gif_file, SEXP width, SEXP height, SEXP delay, SEXP repeats, SEXP progress){
      |                                                                                       ^
wrapper.c:17:101: error: unknown type name 'SEXP'
   17 | SEXP R_png_to_gif(SEXP png_files, SEXP gif_file, SEXP width, SEXP height, SEXP delay, SEXP repeats, SEXP progress){
      |                                                                                                     ^
wrapper.c:18:7: error: call to undeclared function 'Rf_isString'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   18 |   if(!Rf_isString(png_files))
      |       ^
wrapper.c:19:5: error: call to undeclared function 'Rf_error'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   19 |     Rf_error("png_files must be character vector");
      |     ^
wrapper.c:22:21: error: call to undeclared function 'Rf_asInteger'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   22 |   settings.height = Rf_asInteger(height);
      |                     ^
wrapper.c:32:29: error: call to undeclared function 'CHAR'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   32 |   gifski_set_file_output(g, CHAR(STRING_ELT(gif_file, 0)));
      |                             ^
wrapper.c:32:34: error: call to undeclared function 'STRING_ELT'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   32 |   gifski_set_file_output(g, CHAR(STRING_ELT(gif_file, 0)));
      |                                  ^
wrapper.c:35:27: error: call to undeclared function 'Rf_length'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   35 |   for(uint32_t i = 0; i < Rf_length(png_files); i++){
      |                           ^
wrapper.c:36:22: error: call to undeclared function 'Rf_asReal'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   36 |     double pts = i * Rf_asReal(delay);
      |                      ^
wrapper.c:38:7: error: call to undeclared function 'REprintf'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   38 |       REprintf("Failed to add frame %d\n", i);
      |       ^
wrapper.c:39:8: error: call to undeclared function 'Rf_asLogical'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   39 |     if(Rf_asLogical(progress))
      |        ^
wrapper.c:44:6: error: call to undeclared function 'Rf_asLogical'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   44 |   if(Rf_asLogical(progress))
      |      ^
wrapper.c:45:5: error: call to undeclared function 'REprintf'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   45 |     REprintf("\nEncoding to gif...");
      |     ^
1 warning and 19 errors generated.
make: *** [/home/hornik/tmp/R-d-clang-18/etc/Makeconf:195: wrapper.o] Error 1
ERROR: compilation failed for package ‘gifski’
* removing ‘/srv/hornik/tmp/CRAN_pretest/gifski.Rcheck/gifski’