How to give avr-gcc the ability to understand binary (eg. b00010110)

How to give avr-gcc the ability to understand binary (eg. b00010110)

[lynx.abraxas]

Hello!


I'm wondering why my selfcompiled avr-gcc under Linux is not capable of binary
numbers like b00010110. In much code there is this binary  syntax  and  it  is
very  annoying  having  to change it into hex manually. How can I give avr-gcc
this ability?

Thanks
Lynx

Re: How to give avr-gcc the ability to understand binary (eg. b00010110)

[Brian Dessent]

lynx.abraxas@freenet.de wrote:

> I'm wondering why my selfcompiled avr-gcc under Linux is not capable of binary
> numbers like b00010110. In much code there is this binary  syntax  and  it  is
> very  annoying  having  to change it into hex manually. How can I give avr-gcc
> this ability?

This feature has existed as a patch for years but only only recently was
added to FSF gcc.  So you'll either need to use a recent version of gcc
4.3 (r125346 or later) or you'll need to use somebody's AVR out-of-tree
patchset which contained the patch.  Or I suppose you could try
backporting the patch yourself.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23479
http://gcc.gnu.org/viewcvs?view=rev&revision=125346
http://gcc.gnu.org/ml/gcc-patches/2007-04/msg01458.html

Brian

Re: How to give avr-gcc the ability to understand binary (eg. b00010110)

[Kövesdi György]

Hi,

I have another idea: use bitfield structures instead of those ugly binary 
numbers. :-)
gcc has very good optimizing features about it.

Regards
Gyorgy Kovesdi