RE: [avr-gcc-list] GCC native bool compile on mega8

[Dave Hylands]

I typed in the following one line program:

int x() { return sizeof( bool ); }

And compiled it using:

avr-gcc -c -O2 x.cpp

And pinted out the disassembly, using

avr-objdump -D x.o

x.o:     file format elf32-avr

Disassembly of section .text:

00000000 <_Z1xv>:
   0:   81 e0           ldi     r24, 0x01       ; 1
   2:   90 e0           ldi     r25, 0x00       ; 0
   4:   08 95           ret     

So it appears that a bool is a single byte. It certainly isn't a single
bit.

--
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/ 

> -----Original Message-----
> From: address@hidden 
> [mailto:address@hidden On Behalf Of A Day
> Sent: Wednesday, January 12, 2005 10:34 PM
> To: address@hidden
> Subject: [avr-gcc-list] GCC native bool compile on mega8
> 
> 
> What does the AVR-GCC compile bools down to? It would be great if a
> bool compiled down to a single bit, but I suspect bools actually take
> up a full byte. I couldn't find this in the FAQ. Thanks ahead of time
> for your insight :-)
> 
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