banach-space wrote:

> > IIUC, this means that on older system compilation will indeed fail without 
> > `-pthread`, but shouldn't be needed on newer systems. @tarunprabhu - 
> > perhaps add a link to that article in your test and add a note that on many 
> > systems compilation will succeed even without the flag?
> 
> I can do that.

Thank you!

> 
> I was looking around to see if one could force the use of an older libc in 
> the test. The only approaches I found involved some unpleasant inline 
> assembly - which probably wouldn't work in Fortran. Besides, I don't think 
> the library organization has anything to do with glibc's symbol versioning 
> anyway.

The comment that you added does a great job documenting the rationale for there 
not being a more elaborate test.

https://github.com/llvm/llvm-project/pull/77360
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