help needed: undefined references to C functions

[Peter Kleiweg]

I have this package that wraps the ZeroMQ library, so this uses
cgo. It installs and works OK on several linux machines, but I
got a bug report from someone who has it fail to work. It
installs fine, but when he tries to build a program against the
package, he gets linker errors, all references to C functions in
ZeroMQ are undefined.

The user has giving several listings of Go output and
environment, and I still have no clue of what is going on. I
really need help with this.

I noted that his Go version used a slightly different procedure
for installing the package from what I see on my own machine,
but I do not know what this means.

Please have a look at the issue thread here:

https://github.com/pebbe/zmq3/issues/5


--
Peter Kleiweg
my Go programming cookbook: http://www.let.rug.nl/~kleiweg/go/

[Peter Kleiweg]

I just installed Go from tip, and I get the same problems as the other person reported.

[Kamil Kisiel]

On Friday, April 5, 2013 3:29:21 PM UTC-7, Peter Kleiweg wrote:

I just installed Go from tip, and I get the same problems as the other person reported.

Interesting, I've been seeing similar looking errors trying to build llgo against tip in the last few days:

https://groups.google.com/forum/?fromgroups=#!topic/llgo-dev/Efhcn94mwNU 

[Kamil Kisiel]

So I just repeated the process described in that thread with Go 1.0.2 and it built just fine. Seems like a bug in tip. 

[Dave Cheney]

Can you please try to bisect this to a recent revision, it sounds like
you have several reliable test cases.

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[Peter Kleiweg]

Op zaterdag 6 april 2013 00:29:21 UTC+2 schreef Peter Kleiweg het volgende:

I just installed Go from tip, and I get the same problems as the other person reported.

The problem disappears when I add this -ldflags option:

     go build -ldflags="-linkmode internal" file.go

It also disappears when I remove the pkg-config directive in the package.

Is this a bug in tip? Let this be fixed before Go 1.1. 

[Kamil Kisiel]

Yep, in the process of doing that now. 

[Peter Kleiweg]

I reported an issue: https://code.google.com/p/go/issues/detail?id=5224

[Ugorji Nwoke]

I think this is same as https://code.google.com/p/go/issues/detail?id=5205