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Re: Static linking considered harmful



On Tue, Nov 28, 2006 at 10:44:29AM -0500, Jakub Jelinek wrote:
> For programs which don't have such requirements (the vast majority),
> an analysis of the libraries the (dynamically linked) program links against
> (or dlopens) is needed.  There are libraries which keep ABI stable and
> maintain backwards compatibility (either through symbol versioning or
> by strictly only adding new symbols, never changing the semantics of
> old entry points or removing symbols), there are libraries that do that
> mostly, but from time to time bump SONAME, there are libraries which
> change their ABI (and bump SONAME) often.
> 
> For the first category (e.g. glibc, libX11), the rule of thumb is
> link dynamically, don't include the libraries with your program,
> compile and link against the oldest version you still want to support.

Ah but you see, glibc does not maintain backwards compatilibity.

./nscube: relocation error: ./nscube: symbol errno, version GLIBC_2.0 not defined in file libc.so.6 with link time reference

Thankfully, that ISV also provided a statically linked version.

  OG.


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