Re: AIX 5.3 GCC 4.2.1 libstdc++ Linker Problems

[ericbambach1 at discover dot com]

Thanks for responding.

Andrew Haley <aph-gcc@littlepinkcloud.COM> wrote on 09/11/2007 04:53:09 
AM:

> ericbambach1@discover.com writes:
>  > Hello,
>  > 
>  >         Please CC as I'm not subscribed. Hope line breaks are ok, I 
hate 
>  > Lotus Notes :)
>  > 
>  >         I'm having a lot of trouble getting gcc 4.2.1 compiled and 
run on 
>  > AIX 5.3 on the power5 architecture. Even after GCC compiles 
successfully 
>  > it seems libstdc++.a isn't built correctly.
>  > 
>  >         We have the IBM binary gcc-4.0.0 compiler installed in 
>  > /opt/freeware/bin so I know its possible to get GCC on here somehow.
>  > 
>  >         It builds fine but compilation of this simple test program 
fails 
>  > with g++. gcc SEEMS to function ok but I havent checked it in depth 
yet. 
>  > Take a look at the session below (edited for readability + mask 
>  > user+hostname only) where it first fails to find libgcc_s even though 
the 
>  > configure script placed it in /sys/usr/lib just like I asked, Next it 
cant 
>  > link against libstdc++.a. Once I turn on the verbose output I see 
that 
>  > libstdc++.a has no symbols being imported! I dont know much about 
>  > compilers but it seems that I need SOME symbols from libstdc++ are 
needed. 
>  > Last, if I force it to link against IBM's libstdc++.a it works fine. 
>  > 
>  >         Am I building gcc wrong? I did build it with GNU make and the 
AIX 
>  > as+ld. I borrowed IBM's config flags from 4.0.0. Any additional info 
>  > needed?
> 
> This is a clue:
> 
> Configured with: ../gcc-4.2.1/configure --with-as=/usr/bin/as 
> --with-ld=/usr/bin/ld --disable-nls --enable-languages=c,c++ 
> --prefix=/sys/usr/local --bindir=/sys/usr --enable-threads 
> --enable-version-specific-runtime-libs --host=powerpc-ibm-aix5.3.0.0 : 
> (reconfigured) ../gcc-4.2.1/configure --with-as=/usr/bin/as 
> --with-ld=/usr/bin/ld --disable-nls --enable-languages=c,c++ 
> --prefix=/sys/usr/local --with-slibdir=/sys/usr/lib --enable-threads 
> --enable-version-specific-runtime-libs --host=powerpc-ibm-aix5.3.0.0
> 
> So, you configured and built gcc without specifying the dir for the
> shared libgcclibrary, and you then reconfigured with one.  Why did you
> do this?

At first I was just testing the build. Then I reconfigured to put the 
libraries int the location we need them for the server. I figure that may 
be why it can't find libgcc_s initially, but I'm not too worried about 
that. I'm more worried that it can't find symbols in libstdc++.


>  > Symbol
>  > 
>  > 
> 
----------------------------------------------------------------------------------------------
>  >  __gxx_personality_v0      [6]     ER PR hello.c(/tmp//cc05Pxwk.o)
>  >                                    00000111 .data    R_POS    [24] 
>  > _GLOBAL__F_main_8A711DF0
>  > ER: The return code is 8.
>  > ld: 0711-317 ERROR: Undefined symbol: __gxx_personality_v0
>  > collect2: ld returned 8 exit status
> 
> OK, so __gxx_personality_v0 is missing.  It should be in
> /sys/usr/local/lib/libstdc++.  Is it?
> 
> Andrew.
> 

Yea. I know nothing about nm, but as far as I can see its defined in the 
library. The output differs slightly when I compare the IBM build and my 
build but I dont know enough about these numbers to know if it makes a 
difference.

=============================================================
#nm -A /sys/usr/local/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.1/libstdc++.a 
|grep __gxx_personality
/sys/usr/local/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.1/libstdc++.a[libstdc++.so.6]: 
.__gxx_personality_v0 T   268473324        1320
/sys/usr/local/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.1/libstdc++.a[libstdc++.so.6]: 
.__gxx_personality_v0 t   268473324        1320
/sys/usr/local/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.1/libstdc++.a[libstdc++.so.6]: 
_GLOBAL__F___gxx_personality_v0_FE132A57 D   537008628
/sys/usr/local/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.1/libstdc++.a[libstdc++.so.6]: 
__gxx_personality_v0 D   537013384
/sys/usr/local/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.1/libstdc++.a[libstdc++.so.6]: 
__gxx_personality_v0 d   537013384          12
=============================================================
#nm -A /opt/freeware/lib//gcc/powerpc-ibm-aix5.3.0.0/4.0.0//libstdc++.a 
|grep __gxx_personality
/opt/freeware/lib//gcc/powerpc-ibm-aix5.3.0.0/4.0.0//libstdc++.a[libstdc++.so.6]: 
.__gxx_personality_v0 T   268470640
/opt/freeware/lib//gcc/powerpc-ibm-aix5.3.0.0/4.0.0//libstdc++.a[libstdc++.so.6]: 
.__gxx_personality_v0 T   268472188
/opt/freeware/lib//gcc/powerpc-ibm-aix5.3.0.0/4.0.0//libstdc++.a[libstdc++.so.6]: 
.__gxx_personality_v0 t   268470640        1328
/opt/freeware/lib//gcc/powerpc-ibm-aix5.3.0.0/4.0.0//libstdc++.a[libstdc++.so.6]: 
.__gxx_personality_v0 t   268472188          40
/opt/freeware/lib//gcc/powerpc-ibm-aix5.3.0.0/4.0.0//libstdc++.a[libstdc++.so.6]: 
_GLOBAL__F___gxx_personality_v0 D   537015044
/opt/freeware/lib//gcc/powerpc-ibm-aix5.3.0.0/4.0.0//libstdc++.a[libstdc++.so.6]: 
__gxx_personality_v0 D   537020572
/opt/freeware/lib//gcc/powerpc-ibm-aix5.3.0.0/4.0.0//libstdc++.a[libstdc++.so.6]: 
__gxx_personality_v0 d   537020572          12
/opt/freeware/lib//gcc/powerpc-ibm-aix5.3.0.0/4.0.0//libstdc++.a[libstdc++.so.6]: 
__gxx_personality_v0 d   537031444           4