waifu2x-converter-cpp src/threadPool.cpp:99:25: error: ‘perror’ was not declared in this scope

[miffe]

waifu2x-converter-cpp fails to build. Maybe related to gcc 11?

/build/waifu2x-converter-cpp/src/waifu2x-converter-cpp/src/threadPool.cpp: In function ‘void w2xc::notify_event(int)’:
/build/waifu2x-converter-cpp/src/waifu2x-converter-cpp/src/threadPool.cpp:99:25: error: ‘perror’ was not declared in this scope
   99 |                         perror("write");    /* ?? */
      |                         ^~~~~~
/build/waifu2x-converter-cpp/src/waifu2x-converter-cpp/src/threadPool.cpp: In function ‘void w2xc::wait_event(int)’:
/build/waifu2x-converter-cpp/src/waifu2x-converter-cpp/src/threadPool.cpp:111:25: error: ‘perror’ was not declared in this scope
  111 |                         perror("read");    /* ?? */
      |                         ^~~~~~
make[2]: *** [CMakeFiles/w2xc.dir/build.make:160: CMakeFiles/w2xc.dir/src/threadPool.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
/build/waifu2x-converter-cpp/src/waifu2x-converter-cpp/src/modelHandler.cpp: In constructor ‘w2xc::Model::Model(FILE*)’:/build/waifu2x-converter-cpp/src/waifu2x-converter-cpp/src/modelHandler.cpp:1075:22: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
 1075 |                 fread(&nInputPlanes, 4, 1, binfp);
      |                 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/build/waifu2x-converter-cpp/src/waifu2x-converter-cpp/src/modelHandler.cpp:1076:22: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
 1076 |                 fread(&nOutputPlanes, 4, 1, binfp);
      |                 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/build/waifu2x-converter-cpp/src/waifu2x-converter-cpp/src/modelHandler.cpp:1096:54: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
 1096 |                                                 fread(&v, 8, 1, binfp);
      |                                                 ~~~~~^~~~~~~~~~~~~~~~~
/build/waifu2x-converter-cpp/src/waifu2x-converter-cpp/src/modelHandler.cpp:1108:30: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
 1108 |                         fread(&v, 8, 1, binfp);
      |                         ~~~~~^~~~~~~~~~~~~~~~~
/build/waifu2x-converter-cpp/src/waifu2x-converter-cpp/src/modelHandler.cpp: In static member function ‘static bool w2xc::modelUtility::generateModelFromJSON(const _tstring&, std::vector<std::unique_ptr<w2xc::Model> >&)’:
/build/waifu2x-converter-cpp/src/waifu2x-converter-cpp/src/modelHandler.cpp:1173:30: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
 1173 |                         fread(&nModel, 4, 1, binfp);
      |                         ~~~~~^~~~~~~~~~~~~~~~~~~~~~
make[1]: *** [CMakeFiles/Makefile2:141: CMakeFiles/w2xc.dir/all] Error 2
make: *** [Makefile:146: all] Error 2