[krbdev.mit.edu #3176]

[Marc Aurele La France via RT]

On Tue, 13 Sep 2005, Sam Hartman via RT wrote:
>>>>>> "Marc" == Marc Aurele La France <tsi at ualberta.ca> writes:
>    Marc> On Tue, 13 Sep 2005, Sam Hartman via RT wrote:
>    >> Note that the patch to shlib.conf breaks our ABI on AIX.

>    Marc> How so?  How can wrapping, or not, a shared object into an
>    Marc> archive affect a programming interface?  And why is this
>    Marc> wrapping preferable to producing dlopen'able objects?

> Because it changes the name that appears in the liblist section of the
> xcoff object.

... of the _referencing_ xcoff objects, yes.  That's a good point WRT 
compatibility with previous releases of mit-krb5 and/or AIX.  But, at least 
on AIX 5.3, the run-time loader doesn't seem to care whether a referenced .a 
contains shared or static objects.  So old binaries should be OK.

You must admit, though, that the current scheme, before my patch, prevents 
shared/static co-existence, which is not a Good Thing (tm).

>    Marc> Quite frankly, I find it odd that this wrapping is only
>    Marc> being done for AIX, and only by mit-krb5.  Even GNU doesn't
>    Marc> do this.  Is this a remnant of the historical
>    Marc> misundertanding of how AIX shared objects are supposed to
>    Marc> work?

> No.  It's because I actually understood conventions used for the C
> libraries on AIX 3.1, 3.2 and 4.  AIX 4.3 did add optional conventions
> for non-wrapped objects, although it was not clear the linker did a
> good job of finding them when first introduced.

Well, I still have an AIX 3.2.5 system around.  So I can offer to try this 
out there and get back to you.

Marc.

+----------------------------------+-----------------------------------+
|  Marc Aurele La France           |  work:   1-780-492-9310           |
|  Academic Information and        |  fax:    1-780-492-1729           |
|    Communications Technologies   |  email:  tsi at ualberta.ca          |
|  352 General Services Building   +-----------------------------------+
|  University of Alberta           |                                   |
|  Edmonton, Alberta               |     Standard disclaimers apply    |
|  T6G 2H1                         |                                   |
|  CANADA                          |                                   |
+----------------------------------+-----------------------------------+
XFree86 developer and VP.  ATI driver and X server internals.