[avr-libc-dev] Re: Add lib per devide.

[David Brown]

Weddington, Eric wrote:
> > -----Original Message----- From: 
> > address@hidden 
> > [mailto:address@hidden org]
> > On Behalf Of Anatoly Sokolov Sent: Monday, December 22, 2008 12:05
> > AM To: Bob Paddock; address@hidden Subject: Re:
> > [avr-libc-dev] Add lib per devide.
> >
> > > On Sun, Dec 21, 2008 at 2:12 AM, Dmitry K.
> > <address@hidden> wrote:
> > > > > I against, to build full the avr-libc library for device,
> > > > > > this dramatically increase compile time
> > > By how much?  Seconds or days?
> >
> > I use cygwin environment for building avr toolchain. Build time for
> > avr-libc is near  10 minuets. Increase in the number of libraries
> > from  9 (per architecture), up to 100 (per device), will cause
> > increase build time in ten times up to 100 minuets and more at
> > addition of new devices. The same for building avr-gcc.
>
> Note to others: Using 'make -j' will help significantly in the time
> it takes to build avr-libc. However, 'make -j' cannot be easily used
> to build gcc, so this is the greater problem when there are 100+
> devices to build libgcc for.

Have you tried using ccache?  I haven't used it for compiling avrgcc or 
avr-libc (I haven't recompiled these myself for ages - the winavr 
package is too good!), but I've used it for other compilations on both 
cygwin and linux.

mvh.,

David