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From: Chris M Moore <zmower@ntlworld.com>
Subject: Making the same mistake as the broken C interface to fortran
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Date: 2019-06-25T00:33:39+01:00
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Hi,

Read this interesting article today:

https://lwn.net/SubscriberLink/791393/41d57555202e8cdb/

Synopsis: C interfaces to Fortran makes some assumptions about how to 
call fortran ABIs (I don't need to pass the hidden length parameter if 
its a character*1) but now Gfortran has optimisations which assume a 
different calling convention (Thou shalt pass the hidden length).

There are work arounds (compile fortran with 
‑fno‑optimize‑sibling‑calls) but it seems that the proper fix is to pass 
the hidden length parameter.

I had a quick look at the LAPACK bindings and they both seem to use Ada 
characters. :/

-- 
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