x86_64-managarm-gcc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations stdio/vfprintf.c -o stdio/vfprintf -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
stdio/vfprintf.c:5:50: error: unknown type name ‘va_list’
    5 | int (*foo)(FILE *restrict, const char *restrict, va_list) = vfprintf;
      |                                                  ^~~~~~~
stdio/vfprintf.c:2:1: note: ‘va_list’ is defined in header ‘<stdarg.h>’; this is probably fixable by adding ‘#include <stdarg.h>’
    1 | #include <stdio.h>
  +++ |+#include <stdarg.h>
    2 | #ifdef vfprintf