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Re: GCC 7.1, cygwin, undefined reference to ___divmoddi4

From: Liu Hao <lh_mouse at 126 dot com>
To: "gcc-help at gcc dot gnu dot org" <gcc-help at gcc dot gnu dot org>
Cc: tplank at gmx dot at, 10walls at gmail dot com
Date: Mon, 8 May 2017 10:13:41 +0800
Subject: Re: GCC 7.1, cygwin, undefined reference to ___divmoddi4
Authentication-results: sourceware.org; auth=none
References: <0LsfrR-1e4BEH3wbZ-012L64@mail.gmx.com> <6cab7dc2-9c13-a193-d454-a3a8d1f811f9@gmail.com> <0MgHHO-1dRuwG0EXW-00Nici@mail.gmx.com>

On 2017/5/8 7:52, Thomas Plank wrote:

JonY wrote:

Looks like something wrong with libgcc? Check the libgcc symbols from
7.1.0 and the installed version. Not sure if you can workaround by
installing libgcc first.

I solved in in the way, that I took the oppurtunity to switch to
cygwin64 and start completely from scratch.
So my ~15 year old cygwin installation got refreshed.

Compilation worked with the new setup without problems.

This function is used to divide two 64-bit integers on i686, but not onx86_64 because of hardware support for 64-bit division. It is availablein libgcc unless we are building the CRT (winpthreads is also sufferringfrom this problem). I am not familiar with cygwin, but despite that Ithink mingw-w64 could provide it.


--
Best regards,
LH_Mouse

Follow-Ups:
- Re: GCC 7.1, cygwin, undefined reference to ___divmoddi4
  - From: Xi Ruoyao

References:
- GCC 7.1, cygwin, undefined reference to ___divmoddi4
  - From: Thomas Plank
- Re: GCC 7.1, cygwin, undefined reference to ___divmoddi4
  - From: JonY
- Re: GCC 7.1, cygwin, undefined reference to ___divmoddi4
  - From: Thomas Plank

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