Trying again for termios sanity on Linux

[H. Peter Anvin]

On 3/21/25 15:12, Florian Weimer wrote:
> * H. Peter Anvin:
> 
>> What isn't clear to me is how to handle legacy structures and macros
>> (in this case the Bnnn macros) in the header files. Are they supposed
>> to contain some kind of #ifdefs, or is the user simply expected to
>> compile against an older version of glibc (headers and .so files) if
>> they want backwards compatibility?
> 
> Our development model requires the use of an old glibc (for compilation
> *and* linking) if an application needs to run on earlier glibc version.
> People have devised various hacks to avoid this, but they are not part
> of glibc upstream.
> 
> Technically, we also require recompilation of static libraries against
> current headers, but we have made some carve-outs in the past.  Symbol
> versioning does not apply to static libraries because there is no
> linking step that binds the glibc symbol versions at compilation time of
> the static library, so linking older libraries incorrectly picks the
> newest symbol version.  My hunch is that doesn't matter here because use
> of termios facilities is somewhat rare.
> 

Especially so since it has been broken for so long :)

That makes it easy enough.

	-hpa