I'm not convinced because I have yet to see a piece of code
that doesn't work, post that and I'll believe!
Thanks,
Robert
-----Original Message-----
From: jedwards [mailto:address@hidden
Sent: Friday, May 30, 2003 3:00 PM
To: Boehne, Robert
Cc: Albert Chin; address@hidden
Subject: Re: AIX patch for libtool.m4
I tried to explain this to Robert before I don't think I've convienced
him yet.
Currently the default libtool behavior for AIX 5 is to do this with an
archive:
cc -Wl,-bM:SRE -o .libs/libhello.so.2 .libs/hello.o .libs/foo.o -lm
-lc -Wl,-bE:.libs/libhello.exp -Wl,-bnoentry
ar cru libhello.a libhello.so.2
ar cru libhello.a hello.o foo.o
which puts both these objects files in the archive twice - only the
first entry into the archive is read so this is just a waste of space.
Now I notice that there is an exception in libtool.m4 for aix4 which
sorta fixes this problem by not doing the second ar command - you could
just extend that to aix5. But I think that its the wrong way to solve
the problem.
The first ar statement, not the second - is the one which should be
eleminated to produce a standard AIX library.
Now for run time linking support AIX has the -brtl flag which causes it
to look for a file libname.so before libname.a I'm working on this
change and I have almost everything going but its still failing a few of
the tests - I should be there soon.
You are right about the template problem - thats what got me going on
this whole thing in the first place.
I'm probably not explaining things very well -
I hope Rob that you will give my change fair consideration when I get it
done - including reviewing it with other IBM authorities if you feel
the need.
Boehne, Robert wrote:
The only thing I was aware of is that archive members can't
be dlopen'd by libltdl because the right flags aren't passed.
BTW, would you post a link or reference to why -qmkshrobj is needed
with templates when building SYSV-style libraries? I wasn't aware
of any problems with templates.
Rob
-----Original Message-----
From: Albert Chin [mailto:address@hidden
Sent: Friday, May 30, 2003 2:30 PM
To: jedwards
Cc: address@hidden
Subject: Re: AIX patch for libtool.m4
On Fri, May 30, 2003 at 01:20:44PM -0600, jedwards wrote:
I'm working on a general update to libtool.m4 for aix5 and aix library
support - do you want to wait a week or so to see what I manage to do?
I think the only thing lacking is xlC support. Of course, there's also
32/64-bit support but there's a workaround for that. What else are you
working on?
Albert Chin wrote:
On Tue, May 27, 2003 at 02:40:04PM -0500, Boehne, Robert wrote:
Ok, that was interesting. Apparently Jim, you are correct, it is valid to
add -qmkshrobj to a -G command line. However, I do not believe that
Libtool should do this by default. If you want to add it yourself you
can,
Libtool allows this with -XCompiler -XLinker and -XCCLinker. If you still
think this should be done by default, let us know why.
Wel, to get xlC C++ support for AIX, we're going to need -qmkshrobj.
I'm going to work on adding it this weekend. By default, -qmkshrobj
will export all symbols. We create our own export list for xlc C
shared libraries. Do we want to create our own export list for xlc C++
shared libraries as well?
--
Jim Edwards address@hidden
IBM Applications Analyst
NCAR SCD
BOULDER CO 303-497-1842
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