/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations stdlib/ptsname_r.c -o stdlib/ptsname_r -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -latomic
stdlib/ptsname_r.c:11:35: error: use of undeclared identifier 'ptsname_r'
int (*foo)(int, char *, size_t) = ptsname_r;
                                  ^
1 error generated.