major: symbol not found when building static stack

[nh2]

https://buildkite.com/nh2/static-haskell-nix/builds/273#a06ac192-1741-4de4-bac5-e470c724a6d0

With the latest nixpkgs master upgrade it shows:

[10 of 18] Compiling Pantry.Storage   ( src/Pantry/Storage.hs, dist/build/Pantry/Storage.o )

<no location info>: error:
    <command line>: can't load .so/.DLL for: /nix/store/929njkajlm1bqp6pn42zchgn4pba7qqw-unix-compat-0.5.1/lib/ghc-8.4.4/x86_64-linux-ghc-8.4.4/libHSunix-compat-0.5.1-IZ2l0C7CE13FdrCF8rJfBj-ghc8.4.4.so (Error relocating /nix/store/929njkajlm1bqp6pn42zchgn4pba7qqw-unix-compat-0.5.1/lib/ghc-8.4.4/x86_64-linux-ghc-8.4.4/libHSunix-compat-0.5.1-IZ2l0C7CE13FdrCF8rJfBj-ghc8.4.4.so: major: symbol not found)

[nh2]

@qrilka said:

could it be about major not being a function but a macro in musl?

See:

• musl: https://github.com/ifduyue/musl/blob/79f653c6bc2881dd6855299c908a442f56cb7c2b/include/sys/sysmacros.h#L4
• glibc: https://github.com/bminor/glibc/blob/f1c314d27552eb6ce5db23b98b293696925741d5/misc/sys/sysmacros.h#L60https://github.com/bminor/glibc/blob/master/misc/sys/sysmacros.h#L60

[nh2]

That's a very good guess. https://forums.gentoo.org/viewtopic-t-1090818-start-0.html supports that.

[nh2]

We should find where in (apparently) unix-compat it's used.

[nh2]

Found it:

• foreign import ccall unsafe "unix_major" unix_major :: CDev -> CUInt
• cbits: unsigned int unix_major(dev_t dev){ return major(dev); }

Luckily github shows at the top the most recent commit named Fix sysmacros.h include for non-glibc libcs (#43) https://github.com/jacobstanley/unix-compat/commit/4394fb8d02cbe1eba8c9e83007296339a8e18b0d

[nh2]

https://github.com/jacobstanley/unix-compat/pull/43

Fixed in unix-compat-0.5.2, and we have 0.5.1.

That explains it, thanks @qrilka !