Re: [discuss] Binary compatibility between Illumos distributions

["Joshua M. Clulow via illumos-discuss" <discuss@lists.illumos.org>]

On Sun, 29 Sept 2024 at 12:16, Sad Clouds <cryintothebluesky@gmail.com> wrote:
> OK thanks for the info. Maybe ABI was the wrong word to use, I guess I was referring to a mixture of ABI and API changes that may occur during OS major version upgrade. To give you a specific example, some of the software I work on is using thread affinity APIs to bind threads to specific CPUs. Solaris < 11.2 and Illumos only support processor_bind()which has a limitation where a thread can be bound to only one CPU, where Solaris >= 11.2 also supports processor_affinity() where a thread can be bound to multiple CPUs. I quite dislike GNU autoconf scripts and tend to extract OS name and major/minor version via uname commands in a makefile and then expose various C macros to work around API differences.

I would strongly advise feature detection instead of using versions.
I don't think anybody particularly enjoys autoconf, but in this area
they are often doing the right thing: if you care about the presence
of a specific interface, you should use some feature detection
mechanism to check for it.


Cheers.

-- 
Joshua M. Clulow
http://blog.sysmgr.org

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