Windows support

[pflaquerre]

This branch allows Torch 7 to be built on Windows with icc, and adds timer support. To compile:

• Install intel's compiler (msvc doesn't support c99)
• Launch cmake-gui
• Set CMAKE_C_FLAGS and CMAKE_CXX_FLAGS to "/Qopenmp /Qstd=c99"
• Set INTEL_COMPILER_DIR
• Generate
• Open Torch.sln
• Right-click the solution in the solution explorer, click Intel C++ Compiler Pro, click Use Intel C++
• Build the solution
• Build the INSTALL target

Some remaining warnings:

warning #63: shift count is too large, libraries\TH\generic/THTensorRandom.c:20
warning #264: floating-point value does not fit in required floating-point type, packages\nn\generic/TemporalLogSoftMax.c:19

[fasiha]

I started trying to build Torch7 with MSVC 2008 on Windows 7 after reading that "Torch7 is mainly made out of ANSI C and Lua, which makes it easy to compile everywhere" and before reading, a little lower in the manual, that Windows is not currently supported. I thought I'd just record here that a few times in the build steps starting with "C_HAS_SSE" (e.g., C_HAS_SSE1_1, etc.), MSVC complained that the source code it was compiling had an error, that a variable b was being used before it was initialized. I was able to "Ignore" these errors and the build process continued.

Then the build process quit because READLINE_INCLUDE_DIR is not defined (although the README specifies this as an optional requirement). I will try installing readline via GnuWin32 and update, but just wanted to post my results from tonight.

[Atcold]

@fasiha, have you managed eventually to build Torch7 under Windows?
If so, do you have any note to share with other people? We would really appreciate it.

[fasiha]

Sorry, I didn't make any more progress on it.

[Atcold]

Just a note for future reference.
There Torch binaries available for Windows and there is no plan to keep updating them. Further information can be found on the Torch's Google Group.