Eroare de compilare: /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/libgcc_eh.a(unwind-dw2-fde-dip.o): in function `__register_frame_info_bases': (.text+0x1b49): undefined reference to `pthread_mutex_lock' /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/libgcc_eh.a(unwind-dw2-fde-dip.o): in function `__register_frame_info': (.text+0x1c03): undefined reference to `pthread_mutex_lock' /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/libgcc_eh.a(unwind-dw2-fde-dip.o): in function `__register_frame_info_table_bases': (.text+0x1cd8): undefined reference to `pthread_mutex_lock' /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/libgcc_eh.a(unwind-dw2-fde-dip.o): in function `__register_frame_info_table': (.text+0x1d70): undefined reference to `pthread_mutex_lock' /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/libgcc_eh.a(unwind-dw2-fde-dip.o): in function `__register_frame_table': (.text+0x1e1d): undefined reference to `pthread_mutex_lock' /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/libgcc_eh.a(unwind-dw2-fde-dip.o):(.text+0x1e9e): more undefined references to `pthread_mutex_lock' follow /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/libgcc_eh.a(unwind-dw2-fde-dip.o): in function `__deregister_frame_info_bases': (.text+0x1eea): undefined reference to `pthread_mutex_unlock' /usr/bin/ld: (.text+0x1f6d): undefined reference to `pthread_mutex_unlock' /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/libgcc_eh.a(unwind-dw2-fde-dip.o): in function `_Unwind_Find_FDE': (.text+0x2094): undefined reference to `pthread_mutex_lock' /usr/bin/ld: (.text+0x21d3): undefined reference to `pthread_mutex_unlock' /usr/bin/ld: (.text+0x2221): undefined reference to `pthread_mutex_unlock' /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/libgcc_eh.a(unwind-dw2-fde-dip.o): in function `__register_frame_info_bases': (.text+0x1b7c): undefined reference to `pthread_mutex_unlock' /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/libgcc_eh.a(unwind-dw2-fde-dip.o): in function `__register_frame_info': (.text+0x1c36): undefined reference to `pthread_mutex_unlock' /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/libgcc_eh.a(unwind-dw2-fde-dip.o): in function `__register_frame_info_table_bases': (.text+0x1d0b): undefined reference to `pthread_mutex_unlock' /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/libgcc_eh.a(unwind-dw2-fde-dip.o):(.text+0x1da3): more undefined references to `pthread_mutex_unlock' follow /usr/bin/ld: ./cc4Ku9ui.o: in function `Warshall': main.c:(.text+0xcc): undefined reference to `pthread_mutex_lock' /usr/bin/ld: main.c:(.text+0xf4): undefined reference to `pthread_mutex_unlock' /usr/bin/ld: ./cc4Ku9ui.o: in function `main': main.c:(.text.startup+0x47): undefined reference to `pthread_mutex_init' /usr/bin/ld: main.c:(.text.startup+0xfd): undefined reference to `pthread_create' /usr/bin/ld: main.c:(.text.startup+0x123): undefined reference to `pthread_join' /usr/bin/ld: main.c:(.text.startup+0x19f): undefined reference to `pthread_mutex_destroy' collect2: error: ld returned 1 exit status Non zero exit status: 1