This is the mail archive of the cygwin mailing list for the Cygwin project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: qsort_r and libc.a version?


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?

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]