Re: compiling with Sun Studio

[John Swensen]

John W. Eaton wrote:
> On 29-Aug-2007, John Swensen wrote:
>
> | I'm not sure why there is a libgcc_s.so in the /opt/csw/lib directory.  
> | I think it is because the CSW package system installs 2 compilers: GCC3 
> | and GCC4.  It puts GCC3 in both /opt/csw/bin and in /opt/csw/gcc3/bin, 
> | and GCC4 in /opt/csw/gcc4/bin.  So this libgcc_s.so probably corresponds 
> | to GCC3.
>
> That installation looks a bit screwed up.
>
> jwe
>
>   

I went back and checked the CSW packages again, just to make sure that 
we hadn't don't some sort of "non-standard" installation of GCC.  Sure 
enough, the CSW packages found at http://www.blastwave.org/packages.php 
install it in exactly this manner.

I did a diff on the output of nm for both the old and new version of 
libgcc_s.so.  There are very few differences in symbol names (of course 
a lot of the addressed within the shared library are different, but this 
shouldn't matter).  One of the interesting differences is that there is 
a set of absolute symbols in the file that look like GCC version 
numbers.  Both files have
00000000 A GCC_3.0
00000000 A GCC_3.3
00000000 A GCC_3.3.1
00000000 A GCC_3.4
00000000 A GCC_3.4.2

The newer libgcc_s.so also has
00000000 A GCC_4.0.0

So, I don't know if I can simply move the old one out of the way and 
make a symlink to the newer one.  I hate doing hacks like this, but 
don't know how else to proceed.

John Swensen