RE: pic+64bit+sun assembler+unwind-tables => illegal cross section subtraction

[Jay K <jay dot krell at cornell dot edu>]

Ah, good point. I don't think my "real" scenario did that though.
I'll investigate more. Networking problems were?are hampering download 4.5.0 and
 build and configure it.
 
I did come up with Makefile:
 
Assemble = $(shell if test -x /opt/csw/gnu/as ; then echo /opt/csw/gnu/as ; \
     elif test -x /usr/sfw/bin/gas ; then echo /usr/sfw/bin/gas ; \
     else echo "unable to find GNU assembler" ; fi )
 
:) which addresses why I wasn't using GNU as.
 
(Yes, I've heard of autoconf.)
 
Thanks, later,
 - Jay


----------------------------------------
> From: pinskia@gmail.com
> To: jay.krell@cornell.edu
> Subject: Re: pic+64bit+sun assembler+unwind-tables => illegal cross section subtraction
> Date: Sun, 9 May 2010 17:48:04 -0700
> CC: gcc@gcc.gnu.org
>
>
>
> Sent from my iPhone
>
> On May 9, 2010, at 5:42 PM, Jay K wrote:
>
>>
>> I haven't tried 4.5.0 yet.
>>
>>
>> -bash-4.1$ /opt/csw/gcc4/bin/g++ -v
>> Using built-in specs.
>> Target: i386-pc-solaris2.10
>> Configured with: ../gcc-4.3.3/configure --prefix=/opt/csw/gcc4 --
>> exec-prefix=/op
>> t/csw/gcc4
>
>
>
>> --with-gnu-as
>
>
> You configured gcc to build with the gnu as but then run with it so
> what do you expect.
>
>
>> --with-as=/opt/csw/bin/gas --without-gnu-ld --with-ld=/
>> usr/ccs/bin/ld --enable-nls --with-included-gettext --with-libiconv-
>> prefix=/opt/
>> csw --with-x --with-mpfr=/opt/csw --with-gmp=/opt/csw --enable-java-
>> awt=xlib --e
>> nable-libada --enable-libssp --enable-objc-gc --enable-threads=posix
>> --enable-st
>> age1-languages=c --enable-languages=ada,c,c++,fortran,java,objc
>> Thread model: posix
>> gcc version 4.3.3 (GCC)
>>
>>
>> /opt/csw/gcc4/bin/g++ 1.cpp -fPIC -S -m64
>> "1.s", line 117 : Warning: Illegal subtraction - symbols from
>> different sections: ".LFB2", ".DOT-2"
>> "1.s", line 120 : Warning: Illegal subtraction - symbols from
>> different sections: ".LLSDA2", ".DOT-3"
>> void F1();
>> void F2()
>> {
>> try { F1(); } catch(...) {F2(); }
>> }
>>
>>
>> /usr/ccs/bin/as -xarch=amd64 1.s
>>
>>
>>
>> or similar:
>> -bash-4.1$ cat 2.c
>> void F1() { }
>>
>>
>> /opt/csw/gcc4/bin/gcc -fPIC -S -funwind-tables -m64 2.c
>> /usr/ccs/bin/as -xarch=amd64 2.s
>> Assembler: 2.c
>> "2.s", line 38 : Warning: Illegal subtraction - symbols from
>> different sections: ".LFB2", ".DOT-1"
>>
>>
>> I'm aware of this thread:
>> http://gcc.gnu.org/ml/gcc-patches/2006-07/msg00908.html
>>
>>
>>
>> I think I'll switch to GNU as, or omit -funwind-tables for now.
>> Or see if 4.5.0 fixes it.
>> Sparc32, sparc64, x86 work.
>>
>>
>> -gstabs+ also generated .stabd that Sun assembler didn't like.
>> I switched to -gstabs.
>> Maybe I messed up something though, as it looks like gcc is aware
>> not to output .stabd to non-gas.
>> More reason to use GNU assembler, understood.
>>
>>
>> http://gcc.gnu.org/install/specific.html#ix86-x-solaris210
>> could be a bit more precise:
>>>> Recent versions of the Sun assembler in /usr/ccs/bin/as work
>>>> almost as well, though.
>>
>>
>> "almost as well"?
>> Maybe that should say more, like, use -g or -gstabs instead of -
>> gstabs+, don't use 64bit+pic+unwind-tables or 64bit+pic+exceptions
>>
>>
>> I switched to Sun assembler because I'm seeing GNU as installed in
>> different places on different machines.
>> Some people don't install /usr/sfw and the install elsewhere.
>>
>>
>> - Jay