Subject:
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Re: undefined reference to `___ucmpsi2'
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Thu, 18 Jan 2001 21:34:00 GMT
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Viewed:
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1277 times
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"Pat Welch" <legos@mousebrains.com> writes:
> Hi,
>
> The problem is that wakeup_t is an unsigned long, and in order to save space,
> the switch statement is optimized to call a library comparator, ucmpsi2. Since
> the argument to ds_scale is an unsigned int, the argument to LIGHT should also
> be an unsigned int. If you specify the argument prototype to light_found as an
> unsigned int, all works fine. You should also specify the return type of
> light_found as an unsigned int too. Another option is to add the comparator
> function into lib/mint.
Another choice may be a cast in the switch statement, like this:
static wakeup_t light_found(wakeup_t sens_num) {
switch ((unsigned int)sens_num) {
case 2:
return (LIGHT(SENSOR_2) > THRESHOLD);
break;
case 3:
return (LIGHT(SENSOR_3) > THRESHOLD);
break;
}
return 0;
}
bye
Bernardo
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Message is in Reply To:
 | | Re: undefined reference to `___ucmpsi2'
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| Hi, The problem is that wakeup_t is an unsigned long, and in order to save space, the switch statement is optimized to call a library comparator, ucmpsi2. Since the argument to ds_scale is an unsigned int, the argument to LIGHT should also be an (...) (24 years ago, 18-Jan-01, to lugnet.robotics.rcx.legos)
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