testsuite failures on Mac

[Richard Eisenberg]

Hi devs,

On today's HEAD, I built from a cleaned tree and then ran the testsuite. I got gobs of errors. Here's one:

--- ./T2713.run/T2713.stderr.normalised	2017-04-07 15:13:22.000000000 -0400
+++ ./T2713.run/T2713.comp.stderr.normalised	2017-04-07 15:13:22.000000000 -0400
@@ -1,8 +1,4 @@
-
-T2713.hs:11:10:
-    The fixity signature for ‘.*.’ lacks an accompanying binding
-      (The fixity signature must be given where ‘.*.’ is declared)
-
-T2713.hs:12:1:
-    The type signature for ‘f’ lacks an accompanying binding
-      (The type signature must be given where ‘f’ is declared)
+ghc-iserv.bin: 
+lookupSymbol failed in relocateSection (RELOC_GOT)
+/Users/rae/ghc/ghc/libraries/integer-gmp/dist-install/build/HSinteger-<IMPL>-<VERSION>o: unknown symbol `___gmp_rands'
+ghc: unable to load package `integer-<IMPL>-<VERSION>'
*** unexpected failure for T2713(ext-interp)

Although I have minor changes in some type-y stuff, nothing that should cause problems with ghc-iserv. Any thoughts? I'm on a Mac.

Thanks!
Richard