/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations langinfo/ALTMON_5.c -o langinfo/ALTMON_5 -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -latomic
langinfo/ALTMON_5.c:2:17: error: use of undeclared identifier 'ALTMON_5'
int const foo = ALTMON_5;
                ^
1 error generated.