/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations signal/sig2str.c -o signal/sig2str -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -latomic
signal/sig2str.c:5:27: error: use of undeclared identifier 'sig2str'; did you mean 'sigset'?
int (*foo)(int, char *) = sig2str;
                          ^~~~~~~
                          sigset
/usr/include/sys/signal.h:1160:24: note: 'sigset' declared here
extern void (*_NOTHROW(sigset, (int, void(*)(int))))(int);
                       ^
signal/sig2str.c:5:7: error: incompatible function pointer types initializing 'int (*)(int, char *)' with an expression of type 'void (*(int, void (*)(int)))(int)' [-Werror,-Wincompatible-function-pointer-types]
int (*foo)(int, char *) = sig2str;
      ^                   ~~~~~~~
2 errors generated.