[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: RFC: on AIX, which "soname"-equivalent to prefer with runtime linkin
From: |
Michael Haubenwallner |
Subject: |
Re: RFC: on AIX, which "soname"-equivalent to prefer with runtime linking? |
Date: |
Tue, 08 Feb 2011 22:00:02 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.13) Gecko/20110113 Lightning/1.0b3pre Lanikai/3.1.7 |
Hello again,
some updates regarding the '# autoload' property in general, as well as
in combination with both 32 and 64 bit shared objects in one archive:
On 01/21/11 15:19, Michael Haubenwallner wrote:
> *) Create the Import File "shr.imp", containing
> - this header:
> #! libNAME.so.1(shr.o)
> # autoload
> #! libNAME.so.1(shr.o)
> - the list of symbols exported.
> *) '# autoload' keeps a reference to the shared object in the
> target binary even when not referenced by some static object.
The problem here is that there is no way to tell the '# autoload' to fire
in either 32 _or_ 64 bit mode only. So when using '# autoload', both 32 and
64 bit shared objects must have the _same_ member name, e.g. "(shr.o)".
When not using '# autoload' (or even independent of that), an additional
line indicating the bitness of the exported symbols would make sense -
either '# 32' or '# 64', to load the correct archive member when needed.
I tend to omit the '# autoload' (and the subsequent '#!') line, as this
is how it works with traditional shared libraries anyway:
> Unfortunately, another shared object having undefined symbols provided
> by this shared object does not trigger the latter to be referenced.
Additionally, the ld manpage for AIX [1] says for undefined symbols,
in section 'Import and Export File Format' [2]: "The main program must
export symbols imported by other modules, or loading will fail."
[1]
http://publib.boulder.ibm.com/infocenter/aix/v6r1/topic/com.ibm.aix.cmds/doc/aixcmds3/ld.htm
[2]
http://publib.boulder.ibm.com/infocenter/aix/v6r1/topic/com.ibm.aix.cmds/doc/aixcmds3/ld.htm#a3119106d
/haubi/
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- Re: RFC: on AIX, which "soname"-equivalent to prefer with runtime linking?,
Michael Haubenwallner <=