Eroare de compilare: main.cpp: In function 'char nextch()': main.cpp:26:58: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(pos==BUF_SIZE) fread(buf, BUF_SIZE, 1, fin), pos=0; ^ ./ccDRo5zT.o: In function `callFFT(void*)': main.cpp:(.text+0x2d3): undefined reference to `pthread_exit' ./ccDRo5zT.o: In function `main': main.cpp:(.text.startup+0x479): undefined reference to `pthread_create' main.cpp:(.text.startup+0x4a1): undefined reference to `pthread_join' collect2: error: ld returned 1 exit status Non zero exit status: 1