cc -O2 -pipe  -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations langinfo/ALTMON_4.c -o langinfo/ALTMON_4 -D_POSIX_C_SOURCE=202405L  -lm -lpthread 
langinfo/ALTMON_4.c:2:17: error: use of undeclared identifier 'ALTMON_4'
int const foo = ALTMON_4;
                ^
1 error generated.