Re: object file compatiblity

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From	Ian Collins <ian-news@hotmail.com>
Newsgroups	comp.lang.c
Subject	Re: object file compatiblity
Date	Mon, 26 Oct 2015 10:43:34 +1300
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paul.anton.letnes@gmail.com wrote:
> Hi!
>
> Disclaimer: I've programmed very little pure C in my life, and don't
> consider myself a C programmer. You probably don't, either.
>
> I've got an object file that is difficult to recreate from source in
> my C/Fortran mixed-language project. This object file is generated
> from a C source file, but it's not written by me - build system nor
> source code. It's compiled by MSVC from visual studio 2013. Is this
> object file (.obj) compatible for linking with Visual Studio
> 2010/2012/2015 compiled code? What if I create a static library
> (.lib) containing this single object file?
>
> What I've got in mind is checking the object file into git and
> linking it in with the rest of the project which is compiled from
> source every time. Colleagues might use other versions of MSVC/Visual
> Studio, though, so that's something I need to understand.
>
> I'd appreciate any pointers to documentation that explains this in
> more detail.

There isn't really a generic C answer to this question, the answer would 
be platform specific.  In general, with a reasonably long list of ifs it 
might work :)

The ifs would include the level of optimisation used, compiler options 
that may change the layout of data, platform ABI stability and so forth.

If the file does link, test it to death.

-- 
Ian Collins

Thread

object file compatiblity paul.anton.letnes@gmail.com - 2015-10-25 14:11 -0700
  Re: object file compatiblity Ian Collins <ian-news@hotmail.com> - 2015-10-26 10:43 +1300
  Re: object file compatiblity James Kuyper <jameskuyper@verizon.net> - 2015-10-25 17:49 -0400
    Re: object file compatiblity Philipp Klaus Krause <pkk@spth.de> - 2015-10-25 22:53 +0100
      Re: object file compatiblity James Kuyper <jameskuyper@verizon.net> - 2015-10-25 18:29 -0400
    Re: object file compatiblity Keith Thompson <kst-u@mib.org> - 2015-10-25 15:00 -0700
    Re: object file compatiblity paul.anton.letnes@gmail.com - 2015-10-26 00:15 -0700
  Re: object file compatiblity Noob <root@127.0.0.1> - 2015-10-25 23:20 +0100
    Re: object file compatiblity paul.anton.letnes@gmail.com - 2015-10-26 00:21 -0700
  Re: object file compatiblity glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-26 03:14 +0000
    Re: object file compatiblity paul.anton.letnes@gmail.com - 2015-10-26 00:23 -0700
      Re: object file compatiblity Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-10-26 13:49 +0000
  Re: object file compatiblity Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-10-26 02:31 -0700
    Re: object file compatiblity Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-10-26 16:59 +0000
  Re: object file compatiblity "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-26 07:40 -0700

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