Will FedoraCore1-built binaries run on all Fedora systems?

[Matt England]

At 1/5/2006 12:45 PM, Allen Smith wrote:
>You can also type:
>ldd foo
>to get a list of dynamic libraries needed by a binary called foo.


Yes, thank you for the library-dependency background info.  I'm a developer 
and have some experience in this topic.

What I do not know:  how much work does the Fedora community do to ensure 
that the libraries for new FedoraCore platforms are backwards compatible 
with old ones?

I am building software to target all the Fedora platforms (from FC1 through 
FC4...or any new ones that come out), and I'd prefer that I build one 
binary for all four (currently) of the FedoraCore platforms for the 
i386/i686 base...and not have to setup and run 4 different Fedora build 
machines in my "build farm" (from which I'm also building Windows, RHEL, 
Debian, and probably FreeBSD flavors of my software as well).

As side note: are i386/i686 essentially the same binary?  Or should I be 
careful to binary-distribution-config control (and differentiate between) 
these 2 flavors (i386 and i686)?

To be clear: I'm not worried about .rpm packages for now.  I'm just talking 
about the binary-application dependence, and therefore the conversation 
probably becomes mostly a library-dependence conversation.

I am building exclusively C++-based code using the g++ toolset that comes 
with whatever Fedora machine I build from, and I can update the g++ toolset 
as need be.

-Matt


At 1/5/2006 12:45 PM, Allen Smith wrote:
>You can also type:
>
>ldd foo
>
>to get a list of dynamic libraries needed by a binary called foo.
>
>-Allen
>
>On Thursday 05 January 2006 10:33, Tom Callahan wrote:
> > Binaries are dependant upon the libraries they were built with, and what
> > CPU platform. x86_64 binaries will not work on i686/i386, but i686/i386
> > binaries will usually work on x86_64 machines.
> >
> > Use this to find out what libraries are needed:
> > strace /path/to/program
> >
> > and look for open(xxxxxxx) statements. Those are the libraries needed
> > for the binary to run.
> >
> > Thanks,
> >
> > Tom Callahan
> > TESSCO Technologies
> > (443)-506-6216
> > callahant at tessco.com
> >
> > A real engineer only resorts to documentation when the keyboard dents 
> on the forehead get too noticeable.
> >
> >
> >
> > Matt England wrote:
> >
> > > Hello,
> > >
> > > Will FedoraCore1-built binaries run on all Fedora systems?
> > >
> > > ie, will a FC1-build binary also run on FC2, FC3, and FC4?  Does it
> > > depend on the binary/app and/or library dependencies?
> > >
> > > If this does not work for FC1, then are any of the FCx-built binaries
> > > "forward" compatible?  eg, will a FC2 binary run on FC3 or FC4?
> > >
> > > -Matt
> > >
> >
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