Installing packages fails with could not allocate pools

[paulmenzel]

With Julia 0.4.5 and 0.4.6, it looks like that installing packages might fail, if Julia was build on a machine with more threads/cores than the machine, the Julia is executed on.

> julia
               _
   _       _ _(_)_     |  A fresh approach to technical computing
  (_)     | (_) (_)    |  Documentation: http://docs.julialang.org
   _ _   _| |_  __ _   |  Type "?help" for help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 0.4.6 (2016-06-19 17:16 UTC)
 _/ |\__'_|_|_|\__'_|  |  
|__/                   |  x86_64-unknown-linux-gnu

julia> Pkg.add("IJulia")
INFO: Initializing package repository /home/pmenzel/.julia/v0.4
INFO: Cloning METADATA from git://github.com/JuliaLang/METADATA.jl
INFO: Cloning cache of BinDeps from git://github.com/JuliaLang/BinDeps.jl.git
INFO: Cloning cache of Compat from git://github.com/JuliaLang/Compat.jl.git
INFO: Cloning cache of Conda from git://github.com/Luthaf/Conda.jl.git
INFO: Cloning cache of IJulia from git://github.com/JuliaLang/IJulia.jl.git
INFO: Cloning cache of JSON from git://github.com/JuliaLang/JSON.jl.git
INFO: Cloning cache of Nettle from git://github.com/staticfloat/Nettle.jl.git
INFO: Cloning cache of SHA from git://github.com/staticfloat/SHA.jl.git
INFO: Cloning cache of URIParser from git://github.com/JuliaWeb/URIParser.jl.git
INFO: Cloning cache of ZMQ from git://github.com/JuliaLang/ZMQ.jl.git
INFO: Installing BinDeps v0.3.21
INFO: Installing Compat v0.8.4
INFO: Installing Conda v0.2.2
INFO: Installing IJulia v1.1.10
INFO: Installing JSON v0.6.0
INFO: Installing Nettle v0.2.3
INFO: Installing SHA v0.1.2
INFO: Installing URIParser v0.1.5
INFO: Installing ZMQ v0.3.2
INFO: Building Nettle
could not allocate pools
===============================[ ERROR: Nettle ]================================

LoadError: write: broken pipe (EPIPE)
while loading /home/pmenzel/.julia/v0.4/Nettle/deps/build.jl, in expression starting on line 1

================================================================================
INFO: Building ZMQ
could not allocate pools
=================================[ ERROR: ZMQ ]=================================

LoadError: write: broken pipe (EPIPE)
while loading /home/pmenzel/.julia/v0.4/ZMQ/deps/build.jl, in expression starting on line 1

================================================================================
INFO: Building IJulia
could not allocate pools
===============================[ ERROR: IJulia ]================================

LoadError: write: broken pipe (EPIPE)
while loading /home/pmenzel/.julia/v0.4/IJulia/deps/build.jl, in expression starting on line 2

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

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

WARNING: IJulia, Nettle and ZMQ had build errors.

 - packages with build errors remain installed in /home/pmenzel/.julia/v0.4
 - build the package(s) and all dependencies with `Pkg.build("IJulia", "Nettle", "ZMQ")`
 - build a single package by running its `deps/build.jl` script

========================================================================================================================================================================================================================================================================================================================================================================================================================================
INFO: Package database updated

julia>

Doing the same on the build machine, the package installs correctly.

[yuyichao]

Dup of #10390