[FFmpeg-devel] ICC version checks

[Måns Rullgård]

Frank Barchard <fbarchard at google.com> writes:

> This is Intel's response
>
> "I am not sure if Mans has found something specific but yes some of the
> previous versions of icc were not compatible with some of the versions of
> gcc.  It was typically a mix and match of the static libraries between being
> built with icc an gcc.  Libraries being called between monolithic .so to
> executable etc was typically okay to do.  It just depends on when the code
> migrates from one compiler e.g. gcc to icc the other or visa versa.  For
> example icc 9.1 was not compatible with gcc 4.2 if I remember correctly.  We
> have tried to stay compatible with gcc but it isn't always possible."

That seems to be talking about binary compatibility, probably with
libgcc and libstdc++.  I'm talking about frontend compatibility with
language extensions such as attributes.  If icc claims to be
compatible with whatever random gcc version I happen to have
installed, there is no way it can be true in general.  The correct
thing for icc to do would be reporting the latest gcc version it is
known to be fully compatible with.  That is what most other compilers
(try to) do.

-- 
M?ns Rullg?rd
mans at mansr.com