clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations langinfo/ABALTMON_9.c -o langinfo/ABALTMON_9 -D_POSIX_C_SOURCE=202405L  -lm  -lintl
langinfo/ABALTMON_9.c:2:17: error: use of undeclared identifier 'ABALTMON_9'
int const foo = ABALTMON_9;
                ^
1 error generated.