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Libtool Digest, Vol 17, Issue 13 |
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Today's Topics:
1. Re: C linkage problem when C++ library is used. (Bob Friesenhahn)
2. Re: Shared library support in Interix? (Todd Vierling)
3. [zzSPAM] Junkmail-Notify (Javascript(doctorate (phd)))
(address@hidden)
4. Re: C linkage problem when C++ library is used. (Albert Chin)
5. Would you like to save on pre script ions? (Rosalie Metcalf)
6. The Unscrambler Statistical Software for academics (Sahana Challa)
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Message: 1
Date: Thu, 15 Apr 2004 15:00:42 -0500 (CDT)
From: Bob Friesenhahn <address@hidden>
Subject: Re: C linkage problem when C++ library is used.
To: Braden McDaniel <address@hidden>
Cc: address@hidden
Message-ID:
<address@hidden>
Content-Type: TEXT/PLAIN; charset=US-ASCII
On Thu, 15 Apr 2004, Braden McDaniel wrote:
> > Shouldn't the developer be responsible for using the C++ compiler
> > rather than the C compiler? Why should libtool solve this? Without
> > libtool, the developer should be using the C++ compiler to link
> > anyway.
>
> Perhaps this is an automake problem? That is, I don't think it uses
> CXXLINK--or even generates the variable--in the Makefile.in if it only
> sees C sources in the Makefile.am. Perhaps there needs to be some way to
> tell automake, "use the C++ linker for this."
If the library is built outside of the current Makefile.am, Automake
will have no knowledge of if C++ is involved. The library may be
delivered with the system. However, if that C++ library was built
using libtool, then libtool *does* know that C++ was used and can
record that fact in the .la file for later use.
Bob
======================================
Bob Friesenhahn
address@hidden
http://www.simplesystems.org/users/bfriesen
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Message: 2
Date: Thu, 15 Apr 2004 10:49:07 -0400 (EDT)
From: Todd Vierling <address@hidden>
Subject: Re: Shared library support in Interix?
To: Tristan Fillmore <address@hidden>
Cc: address@hidden
Message-ID: <address@hidden>
Content-Type: TEXT/PLAIN; charset=US-ASCII
On Mon, 12 Apr 2004, Tristan Fillmore wrote:
: I am interested in working on libtool to add support for shared
: libraries on Interix. I've downloaded the 1.5.6 release, but I don't
: see anything as far as a HACKING file...
There is a patch now on the libtool-patches list which implements Interix 3
support. I created this in order to support libtool on Interix inside
NetBSD's pkgsrc packaging system.
--
-- Todd Vierling <address@hidden> <address@hidden>
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Message: 4
Date: Fri, 16 Apr 2004 16:39:15 -0500
From: Albert Chin <address@hidden>
Subject: Re: C linkage problem when C++ library is used.
To: address@hidden
Message-ID: <address@hidden>
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On Thu, Apr 15, 2004 at 02:43:57PM -0500, Bob Friesenhahn wrote:
> On Fri, 16 Apr 2004, Albert Chin wrote:
>
> > On Thu, Apr 15, 2004 at 11:10:20AM -0500, Bob Friesenhahn wrote:
> > > If a program which is based on C language depends on a library which
> > > is implemented in C++, the C++ compiler should be used to link the
> > > program. Otherwise C++ static initialization may not work right, or
> > > linking may fail entirely. Libtool doesn't currently offer any
> > > provision to do that.
> > >
> > > The installed .la file for a C++ library does not indicate the
> > > implementation language, or what linker should be used. When the C++
> > > library was built using modern GCC then libstdc++.la is listed as a
> > > library dependency so at some clue may be gleaned from that fact.
> > >
> > > It seems to me that this is a fundamental flaw in muti-lingual libtool
> > > as it exists today.
> >
> > Shouldn't the developer be responsible for using the C++ compiler
> > rather than the C compiler? Why should libtool solve this? Without
> > libtool, the developer should be using the C++ compiler to link
> > anyway.
>
> The "developer" is not necessarily aware of all the library
> dependencies since she may not be responsible for the maintenance of
> these libraries, or how they are configured. Perhaps in some cases a
> C-based widget library is used, while in other cases a C++-based
> widget library is used. Another unfortunate issue is that when the
> developer provides a .c file to Automake, Automake will automatically
> apply the rules necessary to compile and link a C source file.
> However, if a C++ library is used which was built using libtool, then
> libtool should be aware that C++ is now in the picture and thus C++
> linkage is needed.
>
> Without this support in libtool, whether an application links, or
> successfully runs after linking is platform dependent.
Fine by me. Seems outside the realm of what libtool should accomplish.
--
albert chin (address@hidden)
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Message: 5
Date: Fri, 16 Apr 2004 13:11:53 +0200
From: "Rosalie Metcalf" <address@hidden>
Subject: Would you like to save on pre script ions?
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Message: 6
Date: Fri, 16 Apr 2004 18:23:06 +0530
From: Sahana Challa <address@hidden>
Subject: The Unscrambler Statistical Software for academics
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