* Update Xcode version needed to run Kokoro tests

* Replace deprecated --no-ri --no-rdoc rubygem options with --no-document

This reverts commit 0c8acb6c.

* upgrade dotnet SDK

* upgrade dotnet SDK version in global.json

https://github.com/matthew-brett/multibuild/pull/240

I'm not exactly sure why, but this fixes the failing Bazel presubmit
test. Using the most recent version seems like a good idea anyway so
that we can make sure we're compatible with any new Bazel changes.

New bundler doesn't work with old gem: https://github.com/rbenv/rbenv/issues/1138

Also update Dockerfile for JavaScript. The old one is using an npm that is too outdated

OSX has deprecated OpenSSL, so we need to install it via Homebrew and
build against that version when we build Ruby.

* Bump target frameworks from netcoreapp1.0 to netcoreapp2.2.
Move global.json up to root of repo, change SDK ver to 2.2.100
Change .net core sdk in dockerfile for kokoro to ver 2.2.100

* Re-add curl install

* Change all exe target to 2.1

* Fix incorrect versions in global.json and Dockerfile

* Downgrade version to 2.1 to match exe targets

* introduce separate testing Dockerfile for C#

* revert changes to the shared Dockerfile

* use netcoreapp2.1 for C# conformance tests

* use language specific dockerfile for testing C#

* Edit compatibility tests script to use parameters instead of file copies

* install dotnet SDK on windows before running the tests

* update csharp_EXTRA_DIST

* Add a new test for verifying that the dist package can be installed.

* Update version number to 3.7.0

* Add php/releash.sh to Makefile.am

* Make cpp_distcheck exit on fail

* fix macos build by changing xcode version

* add comments

* fix benchmark build for mac

* fix for gem option and install npm

* add test for node and npm

* fix node

* fix for node

* another attempts to fix node

* another attempts

* clean up

* fix macos build by changing xcode version

* add comments

* fix benchmark build for mac

* fix for gem option and install npm

* add test for node and npm

* fix node

* fix for node

* another attempts to fix node

* another attempts

* clean up

Signed-off-by: Xiang Dai <764524258@qq.com>

* Add several fixes for python toolchain

* Fix versin regex

* Make script exit on error

* Fix version regex

* Fix version regex

* Fix version regex

* Fix version regex

* Make test run on the current commit

* Fix test

* Fix test

* Use git to retrieve current commit

* Fix tests

* Fix tests

* Also make linux and mac work on the current commit

* Fix test

* Use gnu for ruby build because strptime is provided by posix

* Move option to extconf.rb

* Remove unused code in Rakefile

* Add config files for kokoro test

* Use gnu 11

* Define _XOPEN_SOURCE

* Add gnu11 option

* Remove XOPEN

* Try base_cc_flags

* Try config_options

* Move time.h to top

* Try -D_XOPEN_SOURCE=700

* Define XOPEN_SOURCE directly

* Try extconf.rb

* Try CFLAGS

* Try ext.cross_config_options

* Make mac ruby release job fail on error

* Try again

* Try define _XOPEN_SOURCE in extconf.rb

* Try again

* Define __USE_XOPEN

* Remove 2.6.0

* No mingw

* Throw error on mingw

* Remove XOPEN_SOURCE in upb

* Add back mingw

* Remove comment

* Use set -ex
* Use -std=c++14 so -latomic can be found

* Fix python release build.
* Separate config.sh by platform
* Use KOKORO_JOR_NAME to determine the BUILD_COMMIT.
* Use -std=c++14 on MacOS so -latomic can be used.

* Use set -ex
* Use -std=c++14 so -latomic can be found

* Fix python release build.
* Separate config.sh by platform
* Use KOKORO_JOR_NAME to determine the BUILD_COMMIT.
* Use -std=c++14 on MacOS so -latomic can be used.

* Add TC malloc kokoro test

* Update tcmalloc test

* Add ruby 2.6 gem build for linux

* Add docker hub organization

* Add ruby2.6 in cross compile targets

* Fix tests

* Check mac version

* No need to install php in preparation for mac

* Add ruby 2.6 test

* Fix broken tests

* Fix compatibility test

* Fix bundler version

* Use new docker image

* Fix broken test

* Use new docker image in ruby26 test

* Install ruby for mac