Re: Gcc flags for compatibility

[Adam Jackson <ajackson redhat com>]

On Mon, 2007-06-25 at 17:36 -0400, Jakub Jelinek wrote:
> On Mon, Jun 25, 2007 at 02:18:46PM -0700, Chuck Forsberg WA7KGX N2469R wrote:
> > I would like to support development of my programs on my x86_64
> > Fedora 7 server.  I need to cross compile for other Linux distros
> > running on 386.  I tried ading   "-m32 -march=pentium " and -m32
> > to the linker command but the resulting files bomb out with an
> > immediate floating point exception on other systems including
> > Backtrack 2.0 and Ubuntu 5.10.  The same source  files compiled
> > on Ubuntu run fine on Fedora.
> 
> You can read FC6 release notes:
> http://redhat.download.fedoraproject.org/pub/fedora/linux/core/6/i386/os/RELEASE-NOTES-en_US.html#id324893
> 
> If you want to build programs that will work on older distros, you
> should use either compat-gcc-* instead of gcc-*, or link
> with -Wl,--hash-style=sysv or -Wl,--hash-style=both.
> In any case, you need to be lucky and not to use any glibc APIs with
> recent symbol versions, as the older distros will not have them.

Outside of dlvsym(), is there any way to explicitly call a function of a
given symbol version?

- ajax