x86_64-managarm-gcc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sys_types/pthread_mutex_t.c -o sys_types/pthread_mutex_t -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
sys_types/pthread_mutex_t.c:2:1: error: unknown type name ‘pthread_mutex_t’
    2 | pthread_mutex_t* foo;
      | ^~~~~~~~~~~~~~~