go: 1.5 darwin

[zimbatm]

Fixes build issues on Darwin.

I would prefer to keep CGO enabled but it seems like go 1.5 now depends on dsymutil and the Darwin stdenv provides a [dummy version of it](

nixpkgs/pkgs/os-specific/darwin/binutils/default.nix

Line 15 in fa9c81f

# - dsymutil: soon going away once it goes into LLVM (this one is fake anyway)

.

Related issues:

• Go 1.5 on OSX fails to build unable to locate sysctl #9437
• cmd/link: OS X codesign only works with -ldflags -s golang/go#11887
• cmd/link: revisit dwarf in executable files on OS X golang/go#11994

[zimbatm]

The build is failing due to OOM. What's the best way to work around that ?

[domenkozar]

cc @wkennington @lethalman

[pesterhazy]

This PR allows you to build go15Packages.go on Darwin, but go15Packages.crypto fails:

runtime/cgo
go install runtime/cgo: open /nix/store/awx3r2ha5aksx87wy64cz0wgfv7dcziy-go-1.5/share/go/pkg/darwin_amd64/runtime/cgo.a: permission denied

[zimbatm]

I had the issue where the go get commands will try to fetch cgo.a and fail, but it would still be working afterwards.

Another solution might be to provide the dsymutil util instead of using a shim.

[pesterhazy]

@zimbatm this is what I get when I run nix-build -A go15Packages.crypto --show-trace ~/prg/nixpkg:

https://gist.github.com/pesterhazy/134a514b322d522737cb

[zimbatm]

It's a bit of a hack but this fixes cgo building on OSX. @pesterhazy want to give it another shot at this branch ?

I'm sure there is a better way to bring the dsymutil tool into the environment. If anyone has suggestions I'm happy to make the changes.

[pesterhazy]

@zimbatm, that definitely helps. go15packages.crypto now builds. However, go15packages15.text (and go15packages.net) now barf:

# golang.org/x/text/collate/tools/colcmp
/nix/store/59cqpi77rvqsr4zc4jqviz1cw7043wpv-go-1.5.1/share/go/pkg/tool/darwin_amd64/link: /nix/store/59cqpi77rvqsr4zc4jqviz1cw7043wpv-go-1.5.1/share/go/pkg/tool/darwin_amd64/link: combining dwarf failed: open /private/var/folders/rj/8lnf662s3mlgzv5mcq2r2fnc0000gn/T/nix-build-go1.5-text-2015-08-27.drv-2/go-link-257204833/go.dwarf: no such file or directory
builder for ‘/nix/store/lmgwldkrwmbrcmwg3a4fbxwi86namwd7-go1.5-text-2015-08-27.drv’ failed with exit code 1
error: build of ‘/nix/store/lmgwldkrwmbrcmwg3a4fbxwi86namwd7-go1.5-text-2015-08-27.drv’ failed

Might be an unrelated problem though.

[zimbatm]

I suspect that all cgo packages will need dsymutil as well, it seems like
the same issue.

On Sat, 12 Sep 2015 12:00 Paulus Esterhazy notifications@github.com wrote:

@zimbatm https://github.com/zimbatm, that definitely helps.
go15packages.crypto now builds. However, go15packages15.text (and
go15packages.net) now barf:

golang.org/x/text/collate/tools/colcmp

/nix/store/59cqpi77rvqsr4zc4jqviz1cw7043wpv-go-1.5.1/share/go/pkg/tool/darwin_amd64/link http://golang.org/x/text/collate/tools/colcmp/nix/store/59cqpi77rvqsr4zc4jqviz1cw7043wpv-go-1.5.1/share/go/pkg/tool/darwin_amd64/link: /nix/store/59cqpi77rvqsr4zc4jqviz1cw7043wpv-go-1.5.1/share/go/pkg/tool/darwin_amd64/link: combining dwarf failed: open /private/var/folders/rj/8lnf662s3mlgzv5mcq2r2fnc0000gn/T/nix-build-go1.5-text-2015-08-27.drv-2/go-link-257204833/go.dwarf: no such file or directory
builder for ‘/nix/store/lmgwldkrwmbrcmwg3a4fbxwi86namwd7-go1.5-text-2015-08-27.drv’ failed with exit code 1
error: build of ‘/nix/store/lmgwldkrwmbrcmwg3a4fbxwi86namwd7-go1.5-text-2015-08-27.drv’ failed

Might be an unrelated problem though.

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[pesterhazy]

I tried to investigate, but current master doesn't work on OSX anymore because of find params. The issue appears to be fixed in staging but on my lowly macbook air it takes too long to rebuild everything.