dnl These are not in POSIX.
AC_CHECK_FUNCS([fwrite_unlocked fputs_unlocked fputc_unlocked])
dnl Internal functions in libc implementations which must be hooked.
dnl These are not in POSIX.
AC_CHECK_FUNCS([fwrite_unlocked fputs_unlocked fputc_unlocked])
dnl Internal functions in libc implementations which must be hooked.