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Re: at exit alternative for AIX


On Aug 8, 2012, at 3:32 PM, David Edelsohn wrote:

> On Tue, Aug 7, 2012 at 1:42 PM, Perry Smith <pedzsan@gmail.com> wrote:
> 
>> Thanks.  You just provide what I wanted / needed which is a sanity check.
>> 
>> I'll open a bug report and that might get me some help.
>> 
>> I think I've concocted a plan to get __cxa_atexit to work.  I am going to try that
>> first.  That may have utility in other ways.
> 
> Perry,
> 
> You also might want to look at PR 33704, as well as PRs 17053, 13391
> and 2413. It would be good to figure out a way to utilize the patch in
> PR 33704.

Hi Gang,

I'm having an unforeseen issue.  Hopefully I'm just doing something wrong.

I'm on gcc 4.5.2.  I started with a fresh build tree. I'm passing in --enable-__cxa_atexit:

  configure \
    "--with-gmp=${PUBLIC_BASE}" \
    "--with-mpfr=${PUBLIC_BASE}" \
    "--with-mpc=${PUBLIC_BASE}" \
    "--disable-nls" \
    "--enable-threads=aix" \
    "--with-libiconv-prefix=/usr" \
    "--enable-__cxa_atexit" \   <<<<<
    "--enable-languages=c,c++"

config.log confirms this:

  $ /usr/work/src/gcc-4.5.2/configure --prefix=/gsa/ausgsa/projects/r/ruby --with-gmp=/gsa/ausgsa/projects/r/ruby --with-mpfr=/gsa/ausgsa/projects/r/ruby --with-mpc=/gsa/ausgsa/projects/r/ruby --disable-nls --enable-threads=aix --with-libiconv-prefix=/usr --enable-__cxa_atexit --enable-languages=c,c++

But when I look at

nm -Bx powerpc-ibm-aix6.1.0.0/pthread/libstdc++-v3/src/.libs/future.o 

There is still a reference to atexit.  mt_allocator.o also has a reference to atexit.  It is coming from the destructor.

        .line   60
        bl .__cxa_guard_release
        nop
        lwz 3,LC..20(2)
        bl .atexit
        nop

If I explicitly add the -fuse-cxa-atexit, then it uses cxa_atexit.  I got the idea (perhaps mistaken) that the config time option flipped the default.

I will continue this tomorrow but thought (hoped) someone might have a helpful suggestion.

Thank you,
Perry


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