-----Original Message-----
From: Kacvinsky, Tom <tom.kacvin...@vector.com>
Sent: Sunday, March 24, 2019 11:34 AM
To: mingw-w64-public@lists.sourceforge.net
Subject: Re: [Mingw-w64-public] Adding Visual Studio 2017 support to MinGW-w64
HI,
Realized I just be bottom posting. Sorry about that.
-----Original Message-----
From: Martin Storsjö <mar...@martin.st>
Sent: Saturday, March 23, 2019 6:09 PM
To: mingw-w64-public@lists.sourceforge.net
Subject: Re: [Mingw-w64-public] Adding Visual Studio 2017 support to MinGW-w64
On Sat, 23 Mar 2019, Kacvinsky, Tom wrote:
> Hi Martin,
>
> I have a mixed C, C++, and Ada source tree. I used Visual Studio to
> compile C and C++ code, and a MinGW-w64 based Ada compiler. What I
> would like to do is get MinGW-w64 version 5.0.4 (which is what the Ada
> compiler is based on) to have support for the Visual Studio CRT.
>
> So, what I'd like to do is get the specs file used by the Ada compiler
> to have the necessary
> moldnames140 and vcruntime140 (or equivalent) library files for
> linking, so I don't have a mismatch in the runtimes used by Ada
> produced DLLs (via gnatdll) and the run time libraries used by C/C++ based
> libraries and executables.
>
> I suppose an option here is to see what is done in MinGW-w64 6.x and
> see if I can backport it to 5.0.4.
The support for the UCRT, which is what you want, isn't that trivial to
backport - it's rather many changes in many places.
The best way to use it is to rebuild mingw-w64 from scratch with both headers
and crt built with --with-default-msvcrt=ucrt (or ucrtbase). Then your
"libmsvcrt.a" actually will be the libucrt.a (or libucrtbase.a) and will link
against api-ms-win-crt-*.dll or ucrtbase.dll. (VS 2017 by default links against
api-ms-win-crt-*.dll if linking the CRT
dynamically.)
You don't need to care about moldnames, in modern mingw-w64 versions that's an
empty library. And vcruntime140 doesn't matter either, you don't need it
(unless you are packaging an app for windows store).
Question: will the libucrt.a build with v6.0.0 work witch v5.0.4, or will I
need more changes than that?
I am locked into v5.0.4 for the Ada toolchain I am using
Building v6.0.0 from the git repro (git checkout v6.0.06) using the MinGW-w64
5.0.5 compilers (GCC 5.4.) and ran into this problem
misc/onexit_table.c:77:8: error: '_execute_onexit_table' undeclared here (not
in a function)
typeof(_execute_onexit_table) *__MINGW_IMP_SYMBOL(_execute_onexit_table) =
_execute_onexit_table;
What do I need to do here?
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