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Message-id:	<52F3E4DA.40002@cygwin.com>
Date:	Thu, 06 Feb 2014 14:39:06 -0500
From:	"Larry Hall (Cygwin)" <reply-to-list-only-lh AT cygwin DOT com>
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To:	cygwin AT cygwin DOT com
Subject:	Re: qsort_r and libc.a version?
References:	<0C723FEB5B4E5642B25B451BA57E27307514F78A AT S1P5DAG3C DOT EXCHPROD DOT USA DOT NET>
In-reply-to:	<0C723FEB5B4E5642B25B451BA57E27307514F78A@S1P5DAG3C.EXCHPROD.USA.NET>

On 2/6/2014 2:04 PM, Jim Garrison wrote:
> I tried to build libgit2 so I could try to build gitg but encountered
>
>      undefined reference to `qsort_r'
>
> GitHub has a closed issue for this
> https://github.com/libgit2/libgit2/issues/1606 saying that qsort_r was added
> to glibc in version 2.8, released in 2008.
>
> Since libc in Cygwin is part of the base package, how would I find out
> which upstream version it's based on?

Cygwin uses newlib for its C library.  From what I can see, qsort is there
but qsort_r isn't.

> There was a commit in libgit2 that was supposed to fix this :
>
> https://github.com/libgit2/libgit2/commit/0d77647adc1f76df66e437e6442d7f7706e2c38e#diff-bb2cd4651768482b99cb1c52d29ceffdR694
>
> but I don't know enough about Cygwin internals to determine why it still
> fails on Cygwin.

The problem with that patch is that it doesn't take Cygwin into account.
If you append a check for Cygwin there as well (i.e. defined(__CYGWIN__) )
then that should resolve the compile issue.

-- 
Larry

_____________________________________________________________________

A: Yes.
 > Q: Are you sure?
 >> A: Because it reverses the logical flow of conversation.
 >>> Q: Why is top posting annoying in email?

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