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1: reduce python whl package size
2: unify api link logic on all OS
3: add option: MGE_WINDOWS_BUILD_WITH_STATIC_CRT
    --- default OFF
    --- if build CRT(vc runtime) with STATIC with megengine.dll
        some CRT api will crash, for example, flush, so if you
        build with static megengine, and do not want to install CRT
        you can set MGE_WINDOWS_BUILD_WITH_STATIC_CRT TRUE
    --- how to install CRT:
        https://docs.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist?view=msvc-160
        install VC_redist.x64.exe
4: rename megengine_export to megengine_shared(only export needed symbols ),
   caused by runtime symbols conflict with pytorch

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From GITHUB 168

COPYBARA_INTEGRATE_REVIEW=https://api.github.com/repos/MegEngine/MegEngine/pulls/168 from Tricster <mediosrity@gmail.com> 5c775d02dd
Closes #168
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(os vesion >= sp2) build with cmake

* cmake build support(xp sp2):
(dbg)EXTRA_CMAKE_ARGS="-DMGE_DEPLOY_INFERENCE_ON_WINDOWS_XP_SP2=ON"
./scripts/cmake-build/host_build.sh -m -d

(opt)EXTRA_CMAKE_ARGS="-DMGE_DEPLOY_INFERENCE_ON_WINDOWS_XP_SP2=ON"
./scripts/cmake-build/host_build.sh -m

* cmake build support(xp sp3):
(dbg)EXTRA_CMAKE_ARGS="-DMGE_DEPLOY_INFERENCE_ON_WINDOWS_XP=ON"
./scripts/cmake-build/host_build.sh -m -d

(opt)EXTRA_CMAKE_ARGS="-DMGE_DEPLOY_INFERENCE_ON_WINDOWS_XP=ON"
./scripts/cmake-build/host_build.sh -m

* internal behavior:
will define MGB_HAVE_THREAD=0 when enable
-DMGE_DEPLOY_INFERENCE_ON_WINDOWS_XP_SP2=ON

* refer to
https://docs.microsoft.com/en-us/cpp/build/configuring-programs-for-windows-xp?view=msvc-160
xp sp2(x86) do not support vc runtime fully, casused by KERNEL32.dll do not
implement some base apis for c++ std function, for example,
std::mutex/std::thread/std::condition_variable as a workround, we will
disable some MegEngine features on xp sp2 env, for exampe, multi-thread etc!

* about DNN_MUTEX/MGB_MUTEX/LITE_MUTEX, if your code will build in inference
code (even CPU backends), please replace std::mutex to DNN_MUTEX/MGB_MUTEX,

* about multi-thread, if you code need multi-thread support, please
enable it when MGB_HAVE_THREAD=1

* about test build env status
1: Visual Studio 2019(MSVC version <= 14.26.28801)---- pass
2: Visual Studio 2019(MSVC version > 14.26.28801) ---- failed
   caused by this 'new' version will put VCR depends on win7
   KERNEL32.DLL, this may be fixed at Visual Studio 2019 later version
   but we do not test at this MR merge point
3: Visual Studio 2017   ---------- pass
4: Visual Studio 2014   ---------- pass
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lastest 12.0.1, for fit cutlass upgrade

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and add keywords check

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* add asan build option
* fix cpuinfo build opt level
* fix host release build with out debug info
* opt "fix lite bazel/cmake symbols MR"
* other misc build opt

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as some reason, lite_test need static link lite
when cuda enable on gcc7 and gcc8, if not
cask_trt::AbiInfo::~AbiInfo will double call at
atexit stage, which will lead double free at the
end of test, gcc9 do not have this issue, for
compat all CI env, we use static link!!!

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notice: if you are cross build, please follow step
----
define SRC_DIR you sdk root dir
SRC_DIR=$($READLINK -f "`dirname $0`")
source $SRC_DIR/megbrain/scripts/cmake-build/utils/utils.sh
build_flatc $SRC_DIR/megbrain false

your build code
----

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* compat clang-cl 11 build at windows env
* fix cuda/cudnn/trt copy env build failed on windows

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which caused by python official PYPI do not support
LOCAL_VERSION; sync lite setup.py

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add cublas version check when build whl

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pytest and enable cpp test in ci

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