/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations poll/struct-timespec.c -o poll/struct-timespec -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -latomic
poll/struct-timespec.c:2:17: error: tentative definition has type 'struct timespec' that is never completed
struct timespec foo;
                ^
poll/struct-timespec.c:2:8: note: forward declaration of 'struct timespec'
struct timespec foo;
       ^
1 error generated.