build failiure on OSX 10.9

[porterjamesj]

When I run Pkg.build("NLopt"), I get the following:

julia> Pkg.build("NLopt")
INFO: Building Homebrew
HEAD is now at 7dbece7 Merge branch 'kegpkg' of github.com:staticfloat/homebrew into kegpkg
HEAD is now at e7a2203 Tab fix didn't work, revert to old behavior
INFO: Building NLopt
=============================================================================================[ ERROR: NLopt ]=============================================================================================

Provider PackageManager failed to satisfy dependency libnlopt
at /Users/james/.julia/NLopt/deps/build.jl:52

==========================================================================================================================================================================================================

=============================================================================================[ BUILD ERRORS ]=============================================================================================

WARNING: NLopt had build errors.

 - packages with build errors remain installed in /Users/james/.julia
 - build a package and all its dependencies with `Pkg.build(pkg)`
 - build a single package by running its `deps/build.jl` script

==========================================================================================================================================================================================================

I'm not familiar enough with BinDeps to know exactly what's going wrong here.

[mlubin]

Are you using the julia OS X binary or a build from source?

@staticfloat

[porterjamesj]

build from source; 0.2.0-rc4

[mlubin]

Try running

dlopen("libstdc++",RTLD_GLOBAL)

before loading NLopt

[porterjamesj]

👍 that seems to do the trick.

[StefanKarpinski]

Can this issue be closed?

[mlubin]

Not really, it shouldn't be needed to explicitly call dlopen("libstdc++",RTLD_GLOBAL). This is an issue with all homebrew binaries when using Julia built from source on 10.9.

[staticfloat]

I'm not sure what the proper solution for this is. Here are our options:

• Change our OSX build process so that building from source on 10.9 uses libstdc++ by default. I thought we had already done this, but apparently not. Note that this would require all dependencies to also do this, as mixing stdlib's in the same process is generally considered a bad idea, although I don't have concrete reasons as to why that's bad.
• Automatically determine when Julia has been built on something other than libstdc++ and just run dlopen("libstdc++", RTLD_GLOBAL) on startup. This seems like the most hackish way of dealing with this, and if I knew why mixing stdlibs was a bad idea, I would know why we shouldn't do this.
• Maintain separate binary distributions (of both Julia and Homebrew deps) for 10.8- and 10.9+. This is what Homebrew, etc. does.

[mlubin]

What's a bit confusing to me is why these shared libraries don't have an explicit dependency on libstdc++. If they did, then it would be automatically loaded with private visibility and we wouldn't have this issue.

[staticfloat]

Strangely enough, most software I can find DO have explicit dependencies on either libstdc++ or libc++. Perhaps we can pass some compiler option to get this to happen?