cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations string/strsignal.c -o string/strsignal -D_POSIX_C_SOURCE=202405L -lm -lpthread -lnetwork -lbsd -latomic
string/strsignal.c:5:21: error: initialization of 'char * (*)(int)' from incompatible pointer type 'const char * (*)(int)' [-Werror=incompatible-pointer-types]
    5 | char *(*foo)(int) = strsignal;
      |                     ^~~~~~~~~
cc1: all warnings being treated as errors