Fix appveyor builds

[mbrt]

Builds are failing for target x86_64-pc-windows-msvc. The build fails because advapi32-sys can't find ws2_32.lib.

See this PR for a temporary fix, and this rust-lang issue for the complete fix.

[vitaly-krugl]

@mbrt, sorry to disturb you. I am getting the same errors on appveyor using mingw toolchain in an open-source nupic.core build (https://ci.appveyor.com/project/vitaly-krugl/nupic-core/build/job/5rvqsrgoqryoer7n):

C:/Python27/share/mingwpy/bin/../lib/gcc/i686-w64-mingw32/4.9.2/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lws2_32.lib
C:/Python27/share/mingwpy/bin/../lib/gcc/i686-w64-mingw32/4.9.2/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lmswsock.lib
C:/Python27/share/mingwpy/bin/../lib/gcc/i686-w64-mingw32/4.9.2/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lrpcrt4.lib

The commit afc66cf appears to fix the same issue in your Visual Studio build. Do you know what I need to do to fix the similar issue in mingw builds?

Many thanks,
Vitaly

[mbrt]

My problem was about an issue Rust had (or has, I don't know if it is
fixed) in detecting the paths necessary to a proper link in particular
configuration AppVeyor workers has. So calling those batch would set the
PATH variable correctly. I don't know if it's the same issue for you. I
suggest you to ask in the IRC channel if someone else had the same issue,
or to copy the configuration from other crates supporting mingw.
Il 24/mar/2016 22:00, "vitaly-krugl" notifications@github.com ha scritto:

@mbrt https://github.com/mbrt, sorry to disturb you. I am getting the
same errors on appveyor using mingw toolchain in an open-source nupic.core
build (
https://ci.appveyor.com/project/vitaly-krugl/nupic-core/build/job/5rvqsrgoqryoer7n
):

C:/Python27/share/mingwpy/bin/../lib/gcc/i686-w64-mingw32/4.9.2/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lws2_32.lib
C:/Python27/share/mingwpy/bin/../lib/gcc/i686-w64-mingw32/4.9.2/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lmswsock.lib
C:/Python27/share/mingwpy/bin/../lib/gcc/i686-w64-mingw32/4.9.2/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lrpcrt4.lib

The commit afc66cf
afc66cf
appears to fix the same issue in your Visual Studio build. Do you know what
I need to do to fix the similar issue in mingw builds?

Many thanks,
Vitaly

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#43 (comment)

[vitaly-krugl]

Thanks @mbrt

[mbrt]

You're welcome!
Il 24/mar/2016 22:34, "vitaly-krugl" notifications@github.com ha scritto:

Thanks @mbrt https://github.com/mbrt

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#43 (comment)