/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations grp/getgrnam_r.c -o grp/getgrnam_r -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -latomic
grp/getgrnam_r.c:5:7: error: incompatible function pointer types initializing 'int (*)(const char *, struct group *, char *, size_t, struct group **)' (aka 'int (*)(const char *, struct group *, char *, unsigned long, struct group **)') with an expression of type 'int (const char *, struct group *, char *, int, struct group **)' [-Werror,-Wincompatible-function-pointer-types]
int (*foo)(const char *, struct group *, char *, size_t , struct group **) = getgrnam_r;
      ^                                                                      ~~~~~~~~~~
1 error generated.