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* fix build error on ROCM

* Update CMakeLists.txt
Co-authored-by: Nikita Shulga <nikita.shulga@gmail.com>

* address comments and fix cuda detction on rocm
Co-authored-by: Nikita Shulga <nikita.shulga@gmail.com>

Needed to support CUDA builds on CPU machine

Parse `TORCH_CUDA_ARCH_LIST` as new-CUDA-language Cmake-3.18+ style [CMAKE_CUDA_ARCHITECTURES](https://cmake.org/cmake/help/latest/prop_tgt/CUDA_ARCHITECTURES.html#prop_tgt:CUDA_ARCHITECTURES)

* Default to BUILD_SOX=1 in non-Windows systems

Since the adaptation of CMake and restricting to the static linking of libsox,
the build process has become much robust with libsox integration enabled.

This commit makes it default behavior to build libsox integration in non-Windows systems.
The build process still checks BUILD_SOX env var so, setting `BUILD_SOX=0` disables it.

* Switch to cmake for build
* Hide symbols

With this change, `BUILD_TRANSDUCER=1 python setup.py build_ext` now sees `-D_GLIBCXX_USE_CXX11_ABI=` in the compilation command. (Note: sox is C-only so it is not relevant to sox build process)

See also:
 - https://github.com/pytorch/text/pull/931
 - https://stackoverflow.com/a/55406930

* Use cmake for third party

* Apply patch to libmad

* Update gitignore

* Update docker test image

* Add caching to binary build for more reliable build

* Apply same logic to unittest workflow

* Use env var for switching SoX build and default to not

* Update README

* Fix packaging/CI script

* Clean up extension build mechanism and extension location

* Add back the switch to depend on external sox

* Remove print

* Fix

* Update requirements and travis installation

* Drop support for 3.5 and add test for 3.8

* New entry points are packaging/build_wheel.sh and packaging/build_conda.sh. The only mandatory environment variable you have to set is PYTHON_VERSION
* CircleCI configuration uses 2.1-style parametrized builds to let you toggle python version, etc. as you do builds. We create a separate job per build configuration for maximum parallelism
* build_tools/packaging got moved to packaging, to be in-line with directory structure in torchvision
* The build_conda.sh and build_wheel.sh delegate most of the heavy lifting to pkg_helpers.bash, which defines a number of bash functions for performing common operations. The intent is that I'll copy-paste this file between other domain API projects.
* TORCHAUDIO_ prefix removed from envvars, so that I can more easily share packaging scripts between projects
* BUILD_VERSION is completely gone; just change the version number if you need to rebuild
* No more logic for cloning and checking out a fresh copy of torchaudio

Signed-off-by: Edward Z. Yang <ezyang@fb.com>

Signed-off-by: Edward Z. Yang <ezyang@fb.com>

Signed-off-by: Edward Z. Yang <ezyang@fb.com>

Billing of changes:

* Can now toggle what branch is built using BRANCH envvar
* PyTorch nightly we were built against is hardcoded into conda meta.yaml
* Disable Conda Python 3.5 builds as we don't have nightlies for torch at the moment
* No more torchaudio-cpu or torchaudio-nightly suffix
* Remove librosa from testing stanza, so that conda build works with stock anaconda channel
* Change convention on PREFIX to be what we previously called $PREFIX/audio
* Make build_from_source.sh cd-neutral

Signed-off-by: Edward Z. Yang ezyang@fb.com

* Packaging improvements for nightlies

- Instructions for how to install stable and master binaries,
  without hardcoding wheel filenames
- Turn on Python 2 build (numba is only needed for testing)
- Make builds a little more hermetic
- Prefer building against nightly CPU-only torch build
- Don't install all of requirements.txt, it's not necessary
- Updates for OS X too, including portability issues
Signed-off-by: Edward Z. Yang <ezyang@fb.com>

Signed-off-by: Edward Z. Yang <ezyang@fb.com>

Signed-off-by: Edward Z. Yang <ezyang@fb.com>

Signed-off-by: Edward Z. Yang <ezyang@fb.com>

Signed-off-by: Edward Z. Yang <ezyang@fb.com>