make build sometimes hangs using MSVC (vs12) with make jobs > 1

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What is the expected behavior? What do you see instead?
Configure/make complete

What version are you using? On what operating system?
HEAD as of sometime today: v1.3.0-4953-g9065da9

Can you reproduce using the vpxdec or vpxenc tools? What command line are
you using?
N/A: build isse

Please provide any additional information below.
Using mingw 20131004 I see the following:

$ rm -rf ./* && ../configure --target=x86_64-win64-vs12 --enable-debug 
--enable-libyuv --enable-static-msvcrt
 --disable-examples --disable-docs --disable-unit-tests && echo -------MAKE MAKE MAKE-------- && make -j 4 &&
 DIST_DIR=_dist make
Configuring selected codecs
  enabling vp8_encoder
  enabling vp8_decoder
  enabling vp9_encoder
  enabling vp9_decoder
Configuring for target 'x86_64-win64-vs12'
  enabling x86_64
  enabling runtime_cpu_detect
  enabling mmx
  enabling sse
  enabling sse2
  enabling sse3
  enabling ssse3
  enabling sse4_1
  enabling avx
  enabling avx2
  using msvs
  enabling use_x86inc
  disabling ccache
  enabling postproc
  enabling webm_io
  enabling libyuv
Bypassing toolchain for environment detection.
Creating makefiles for x86_64-win64-vs12 libs
Creating makefiles for x86_64-win64-vs12 solution
-------MAKE MAKE MAKE--------
    [CREATE] vpx.def
    [CREATE] vpx_config.asm
    [CREATE] vpx_scale_rtcd.h
    [CREATE] vp8_rtcd.h

Original issue reported on code.google.com by tomfine...@google.com on 5 Dec 2014 at 12:10

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Err, right: It hangs where the output ends. I have to close the console window: 
It will not recover.

Original comment by tomfine...@google.com on 5 Dec 2014 at 12:11

[GoogleCodeExporter]

Original comment by ya...@google.com on 15 Jan 2015 at 11:23

• Changed state: Assigned