/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread  -Wall -Wextra -Werror=implicit-function-declaration stdlib/mkostemp.c -o stdlib/mkostemp -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -latomic
stdlib/mkostemp.c:20:11: error: call to undeclared function 'mkostemp'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]
        int fd = mkostemp(template, O_CLOEXEC | O_APPEND);
                 ^
stdlib/mkostemp.c:20:11: note: did you mean 'mkstemp'?
/usr/include/stdlib.h:517:14: note: 'mkstemp' declared here
        extern int  mkstemp(char *);
                    ^
1 error generated.