several AIX questions

[Ralf Wildenhues]

1) This patch from HEAD:
| 2004-09-26  Albert Chin-A-Young  <address@hidden>
| 
|         * m4/libtool.m4 (_LT_LINKER_SHLIBS) [aix]: In archive_expsym_cmds,
|         move -bnoentry linker option before $compiler_flags to honor any
|         possible -e entries in LDFLAGS.

http://lists.gnu.org/archive/html/libtool-patches/2004-09/msg00321.html

has been applied to the C case only (and not backported to branch-1-5).
Should it not be for C++ as well?  What's the reason for it anyway?
Also, should it not also be applied to the ia64 case?


2) One of the comments in libtool.m4:
| On ia64, ld does runtimelinking by default.

Is it possible to turn this off on ia64?  Even if, is it worthwhile to
support so in Libtool?  If not: let's simplify AIX support in libtool.m4.
The libtool.m4 snippets for aix[45] look like they've been expanded too
much (rtl-or-ia64 case vs not should not be handled twice; and they
actually look like they had been unified at some point in the past).


3) This thing has me stunned (non-rtl case): mdemo-exec on *uninstalled*
modules works, whereas on *installed* ones it fails; reason: we don't
install the .so files.  We
  ar cru libfoo.a libfoo.so.0
and then install libfoo.a only.  What's the right way to fix this?
Install libfoo.so.0 as well?  Is there maybe some root-only trickery
necessary so that the installed .so file isn't necessary (I think not)?


4) Will multiple dlopen()ing of a module give separate instances of
static variables, if the module has not been -brtl'ed?  We need a test
for this.

Cheers,
Ralf