Re: [avr-gcc-list] First steps with avr-gcc

[Ludek Stepan]

Hi Dave,

2005/10/21, Dave Hylands <address@hidden>:
> Hi David,
>
> Sending to the whole list this time.
>
> > My questions:
> > - The C code is not complete in the list file. Usually, the next line
> > after a '{' is missing. Is there something wrong on my side or should it
> > simply be like this?
>
> I normally add a special rule to my makefile to produce list files. I
> use the following options:
>
> %.cod : %.c FORCE
>         $(ECHO) "Listing $< ..."
>         $(Q)$(COMPILE.c) -gstabs -Wa,-ahdlms=$@ $<

I wonder what is behind the $(Q) and $(ECHO) variable in you makefile.
Does this make the utility to hide the compilation listing?

>
> This snippet was from my own makefile that I use for building and
> probably isn't entirely compatible with whatever you're using.
>
> > - the function uses 2 registers (16 bits) while it should only use 8 bits.
> > Is there something wrong on the make settings I used (generated by AVR
> > Studio btw) or something else?
>
> By default, the compiler is setup to use 16 bit ints. The C language
> requires that the & operation promote both sides to ints.
>
> Using the -mint8 option will produce smaller code (but only have 8 bit ints).
>
> > - I'm surely lacking some knowledge here, should I first start reading the
> > make manual, the gcc one or simply improve my C knowledge?
>
> All of the above :) Information like this is normally buried deep and
> often requires connecting multiple tidbits together.
>
> --
> Dave Hylands
> Vancouver, BC, Canada
> http://www.DaveHylands.com/
>
>
> _______________________________________________
> AVR-GCC-list mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
>