Thanks Ben, none of this is obvious to me :) I just read the doc which doesn't mention distclean or rebuild

which I have never had to do on earlier source distributions

. I did a make distclean, then a configure, then a make -j5 and got the same error. by rebuild do you mean do it again starting from scratch?

I did google the error, i.e. 'Haskell "_stg_sel_17_upd_info" ' and found that a few people have encountered this this month. Most importantly it led me to https://ghc.haskell.org/trac/ghc/ticket/11155#comment:10 :

Changed 2 days ago by wereHamster
↳ Reply
Ran into this trying to build HEAD today on Mac OS X 10.11.3. But a slightly different message:

Warning: -rtsopts and -with-rtsopts have no effect with -no-hs-main.
Call hs_init_ghc() from your main() function to set these options.
Undefined symbols for architecture x86_64:
"_stg_sel_17_upd_info", referenced from:
_s1xPf_info in UI.dyn_o
_s1xQA_info in UI.dyn_o
_s1xZU_info in UI.dyn_o
_s1y0r_info in UI.dyn_o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
`gcc' failed in phase `Linker'. (Exit code: 1)
make[1]: *** [ghc/stage2/build/tmp/ghc-stage2] Error 1
make: *** [all] Error 2

Should I reopen 11155 or open a new ticket?

Thanks

George

On Mon, Apr 11, 2016 at 9:33 AM Ben Gamari <ben@well-typed.com> wrote:

George Colpitts <george.colpitts@gmail.com> writes:

> This fails for me with the following error; I'm using the latest macOS and
> Xcode.
>
Hmm, this is very odd. Unfortunately due to firewall issues I don't have
reliable access to our OS X box, so I was unable to test this particular
tarball, but a few days ago I was able to build without any trouble.

Have you checked the obvious things (e.g. distclean, rebuild, etc.)?

Cheers,

- Ben