compiling gcc 4.1.1 for AVR

Amit Choudhary amit2030@yahoo.com
Wed Sep 27 19:47:00 GMT 2006


Hi Alee,

I follow a simple rule:

If I am getting compiler errors that I do not understand and if 
(ideally) those erros should not have been there, then possibly
I am using the wrong toolchain. So, I go looking for the
latest/most appropriate toolchain.

Regards,
Amit

--- alee <alee@IfA.Hawaii.Edu> wrote:

> Kai Ruottu wrote:
> 
> > alee wrote:
> >
> >> I'm trying to compile gcc 4.1.1 for the AVR platorm.
> >
> >
> > You seem to have achieved your goal already!
> >
> >> I compiled binutils 2.17 for the AVR platorm already and
> when I try 
> >> to compile gcc,
> >
> >
> > Can you in any way imagine that the subdirectory 'gcc' in
> the GCC 
> > sources could be that
> > 'GCC' ?  So when it is "compiled", the compiler(s) called as
> "GCC" 
> > is/are ready!
> >
> >> I get the following error:
> >>
> >> ....
> >> checking for avr-gcc... 
> >> /linux_source/gcc-4.1.1/host-i686-pc-linux-gnu/gcc/xgcc 
> >> -B/linux_source/gcc-4.1.1/host-i686-pc-linux-gnu/gcc/ 
> >> -B/opt/avr/avr/bin/ -B/opt/avr/avr/lib/ -isystem
> /opt/avr/avr/include 
> >> -isystem /opt/avr/avr/sys-include
> >> checking for C compiler default output file name...
> configure: error: 
> >> C compiler cannot create executables
> >> See `config.log' for more details.
> >> make[1]: *** [configure-target-libssp] Error 1
> >
> >
> > This error tells that the already built "GCC" for AVR cannot
> create 
> > executables with
> > the help of the AVR targeted 'as' and 'ld', the AVR targeted
> C library 
> > etc.
> >
> > Why the GCC build tries to build the 'libssp.a' for AVR as
> default and 
> > whether it is required for
> > AVR at all, are the questions you should ask here.  Anyway
> there 
> > should be the GCC configure
> > option :
> >
> > |--disable-libssp|
> >    Specify that the run-time libraries for stack smashing
> protection
> >    should not be built.
> >
> > to disable it's build, so if you think it being not needed,
> just 
> > disable it's build!  A reconfigure
> > and a rebuild could show how you could get a clean working
> build but 
> > just as well you could
> > try to remove the 'libssp' subdir from the 
> > '/linux_source/gcc-4.1.1/host-i686-pc-linux-gnu/avr'
> > and then try 'make' again... If this doesn't help, then try
> removing 
> > the 'libssp' "target" from
> > the generated main GCC  'Makefile'.
> >
> >> Where do I get gmp.h?  Do I need it? What else can be
> wrong?
> >
> >
> > My thought is that you don't need 'libssp' for AVR at all...
> >
> >
> >
> 
> Ok...I added the "--disable-libssp" and "make" went further
> but it stops 
> at another error:
> .....
> Entering directory
> `/linux_source/gcc-4.1.1/host-i686-pc-linux-gnu/gcc'
> gcc -c   -g -O2 -DIN_GCC -DCROSS_COMPILE  -W -Wall
> -Wwrite-strings 
> -Wstrict-prototypes -Wmissing-prototypes
> -Wmissing-format-attribute    
> -DHAVE_CONFIG_H -DGENERATOR_FILE -I. -Ibuild -I../.././gcc 
> -I../.././gcc/build -I../.././gcc/../include 
> -I../.././gcc/../libcpp/include     -o build/fix-header.o 
> ../.././gcc/fix-header.c
> /opt/avr/bin/avr-as: unrecognized option `-Qy'
> make[2]: *** [build/fix-header.o] Error 1
> make[2]: Leaving directory 
> `/linux_source/gcc-4.1.1/host-i686-pc-linux-gnu/gcc'
> make[1]: *** [all-gcc] Error 2
> make[1]: Leaving directory `/linux_source/gcc-4.1.1'
> make: *** [all] Error 2
> 
> What is "make" building here?  Do I have a buggy avr-as? 
> avr-as doesn't 
> have the '-Qy' option...should it?  Or is "make" using avr-as 
> incorrectly here?
> 
> Thanks.
> 


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