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Re: libltdl should not always use LT_GLOBAL

From: Bob Friesenhahn
Subject: Re: libltdl should not always use LT_GLOBAL
Date: Sat, 13 Mar 2004 12:27:46 -0600 (CST)

On Sat, 13 Mar 2004, Scott James Remnant wrote:

> package libltdl3
> forwarded 195821 address@hidden
> thanks
> Currently libltdl always dlopen()s libraries with the LT_GLOBAL flag
> (defined as RTLD_GLOBAL | DL_GLOBAL).
> This flag causes the external symbols defined in the library to be made
> available for symbol resolution of subsequently loaded libraries.  This
> isn't the default behaviour of dlopen().

Very interesting.

> Perhaps we need an option whether to dlopen() libraries globally or
> not?  Any thoughts?

The normal behavior of a "module" is that the program or library which
loads it then uses lt_dlsym() to obtain the address of symbols.  It is
not expected that modules have the behavior of normal shared
libraries.  Therefore, it seems to me that libltdl should not be
supplying RTLD_GLOBAL at all.

Bob Friesenhahn

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