compile error error: ‘fopen’ was not declared in this scope

[anonymous]

SMFWriter.cpp: In member function ‘bool Raul::SMFWriter::start(const std::string&, Raul::TimeStamp?)’: SMFWriter.cpp:72: error: ‘fopen’ was not declared in this scope SMFWriter.cpp: In member function ‘virtual void Raul::SMFWriter::write_event(Raul::TimeStamp?, size_t, const unsigned char*)’: SMFWriter.cpp:108: error: ‘fseek’ was not declared in this scope SMFWriter.cpp:120: error: ‘fwrite’ was not declared in this scope SMFWriter.cpp:127: error: ‘fwrite’ was not declared in this scope SMFWriter.cpp: In member function ‘void Raul::SMFWriter::flush()’: SMFWriter.cpp:138: error: ‘fflush’ was not declared in this scope SMFWriter.cpp: In member function ‘void Raul::SMFWriter::finish()’: SMFWriter.cpp:149: error: ‘fclose’ was not declared in this scope SMFWriter.cpp: In member function ‘void Raul::SMFWriter::write_header()’: SMFWriter.cpp:172: error: ‘freopen’ was not declared in this scope SMFWriter.cpp:174: error: ‘fseek’ was not declared in this scope SMFWriter.cpp: In member function ‘void Raul::SMFWriter::write_footer()’: SMFWriter.cpp:185: error: ‘fseek’ was not declared in this scope SMFWriter.cpp:188: error: ‘fwrite’ was not declared in this scope SMFWriter.cpp: In member function ‘void Raul::SMFWriter::write_chunk_header(const char*, uint32_t)’: SMFWriter.cpp:197: error: ‘fwrite’ was not declared in this scope SMFWriter.cpp: In member function ‘void Raul::SMFWriter::write_chunk(const char*, uint32_t, void*)’: SMFWriter.cpp:207: error: ‘fwrite’ was not declared in this scope SMFWriter.cpp: In member function ‘size_t Raul::SMFWriter::write_var_len(uint32_t)’: SMFWriter.cpp:230: error: ‘fputc’ was not declared in this scope