cc -O2 -pipe  -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations monetary/strfmon.c -o monetary/strfmon -D_POSIX_C_SOURCE=202405L  -lm -lpthread 
monetary/strfmon.c:1:10: fatal error: 'monetary.h' file not found
#include <monetary.h>
         ^~~~~~~~~~~~
1 error generated.