-Mono is a software platform designed to allow developers to easily create cross platform applications.
-It is an open source implementation of Microsoft's .NET Framework based on the ECMA standards for C# and the Common Language Runtime.
+Mono is a software platform designed to allow developers to easily
+create cross platform applications. It is an open source
+implementation of Microsoft's .NET Framework based on the ECMA
+standards for C# and the Common Language Runtime.
+
+[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/mono/mono?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
1. [Compilation and Installation](#compilation-and-installation)
2. [Using Mono](#using-mono)
4. [Contributing to Mono](#contributing-to-mono)
5. [Reporting bugs](#reporting-bugs)
6. [Configuration Options](#configuration-options)
+7. [Working with Submodules](#working-with-submodules)
**Build Status**
-| debian-amd64 | debian-i386 | debian-ppc64el | centos-s390x | windows-amd64 |
-|:-----------------------:|:----------------------:|:-------------------------:|:-----------------------:|:-------------------------:|
-| [![debian-amd64][1]][2] | [![debian-i386][3]][4] | [![debian-ppc64el][5]][6] | [![centos-s390x][7]][8] | [![windows-amd64][9]][10] |
+Officially supported architectures:
+
+| debian-amd64 | debian-i386 | debian-armel | debian-armhf | windows-amd64 |
+|-------------------------|------------------------|-------------------------|-------------------------|---------------------------|
+| [![debian-amd64][1]][2] | [![debian-i386][3]][4] | [![debian-armel][5]][6] | [![debian-armhf][7]][8] | [![windows-amd64][9]][10] |
+
+Community supported architectures:
+
+| centos-s390x |
+|---------------------------|
+| [![centos-s390x][11]][12] |
[1]: http://jenkins.mono-project.com/job/test-mono-mainline/label=debian-amd64/badge/icon
[2]: http://jenkins.mono-project.com/job/test-mono-mainline/label=debian-amd64/
[3]: http://jenkins.mono-project.com/job/test-mono-mainline/label=debian-i386/badge/icon
[4]: http://jenkins.mono-project.com/job/test-mono-mainline/label=debian-i386/
-[5]: http://jenkins.mono-project.com/job/test-mono-mainline-communityarchitectures/label=debian-ppc64el/badge/icon
-[6]: http://jenkins.mono-project.com/job/test-mono-mainline-communityarchitectures/label=debian-ppc64el/
-[7]: http://jenkins.mono-project.com/job/test-mono-mainline-communityarchitectures/label=centos-s390x/badge/icon
-[8]: http://jenkins.mono-project.com/job/test-mono-mainline-communityarchitectures/label=centos-s390x/
+[5]: http://jenkins.mono-project.com/job/test-mono-mainline/label=debian-armel/badge/icon
+[6]: http://jenkins.mono-project.com/job/test-mono-mainline/label=debian-armel/
+[7]: http://jenkins.mono-project.com/job/test-mono-mainline/label=debian-armhf/badge/icon
+[8]: http://jenkins.mono-project.com/job/test-mono-mainline/label=debian-armhf/
[9]: https://ci.appveyor.com/api/projects/status/1e61ebdfpbiei58v/branch/master?svg=true
[10]: https://ci.appveyor.com/project/ajlennon/mono-817/branch/master
+[11]: https://jenkins.mono-project.com/job/z/label=centos-s390x/badge/icon
+[12]: https://jenkins.mono-project.com/job/z/label=centos-s390x
Compilation and Installation
============================
This will download and place the files appropriately so that you can then
just run:
- make EXTERNAL_MCS=${PWD}/mcs/class/lib/monolite/basic.exe
+ make
The build will then use the files downloaded by `make get-monolite-latest`.
You can run the mono and mcs test suites with the command: `make check`.
Expect to find a few test suite failures. As a sanity check, you
-can compare the failures you got with [https://wrench.mono-project.com/Wrench/](https://wrench.mono-project.com/Wrench/)
-and [http://jenkins.mono-project.com/](http://jenkins.mono-project.com/).
+can compare the failures you got with [https://jenkins.mono-project.com/](https://jenkins.mono-project.com/).
You can now install mono with: `make install`
* `scripts/` - Scripts used to invoke Mono and the corresponding program.
-* `../olive/` - Incubation code from [Olive](https://github.com/mono/olive).
-
- * If the directory ../olive is present (as an
-independent checkout) from the Mono module, that
-directory is automatically configured to share the
-same prefix than this module gets.
-
Contributing to Mono
====================
-Before submitting changes to Mono, please review the [contribution guidelines](http://www.mono-project.com/community/contributing/).
-Please pay particular attention to the [Important Rules](http://www.mono-project.com/community/contributing/#important-rules) section.
+Before submitting changes to Mono, please review the [contribution
+guidelines](http://www.mono-project.com/community/contributing/).
+Please pay particular attention to the [Important
+Rules](http://www.mono-project.com/community/contributing/#important-rules)
+section.
Reporting bugs
==============
-To submit bug reports, please use [Xamarin's Bugzilla](https://bugzilla.xamarin.com/)
+To submit bug reports, please use [Xamarin's
+Bugzilla](https://bugzilla.xamarin.com/)
Please use the search facility to ensure the same bug hasn't already
-been submitted and follow our [guidelines](http://www.mono-project.com/community/bugs/make-a-good-bug-report/)
+been submitted and follow our
+[guidelines](http://www.mono-project.com/community/bugs/make-a-good-bug-report/)
on how to make a good bug report.
Configuration Options
=====================
-The following are the configuration options that someone
-building Mono might want to use:
+The following are the configuration options that someone building Mono
+might want to use:
-* `--with-sgen=yes,no` - Generational GC support: Used to enable or disable the
-compilation of a Mono runtime with the SGen garbage collector.
+* `--with-sgen=yes,no` - Generational GC support: Used to enable or
+disable the compilation of a Mono runtime with the SGen garbage
+collector.
* On platforms that support it, after building Mono, you will have
-both a `mono` binary and a `mono-sgen` binary. `mono` uses Boehm, while
-`mono-sgen` uses the Simple Generational GC.
+both a `mono` binary and a `mono-sgen` binary. `mono` uses Boehm,
+while `mono-sgen` uses the Simple Generational GC.
-* `--with-gc=[included, boehm, none]` - Selects the default Boehm garbage
-collector engine to use.
+* `--with-gc=[included, boehm, none]` - Selects the default Boehm
+garbage collector engine to use.
- * *included*: (*slighty modified Boehm GC*)
-This is the default value for the Boehm GC, and it's
-the most feature complete, it will allow Mono
-to use typed allocations and support the debugger.
+ * *included*: (*slighty modified Boehm GC*) This is the default
+value for the Boehm GC, and it's the most feature complete, it will
+allow Mono to use typed allocations and support the debugger.
- * *boehm*:
-This is used to use a system-install Boehm GC,
-it is useful to test new features available in
-Boehm GC, but we do not recommend that people
-use this, as it disables a few features.
+ * *boehm*: This is used to use a system-install Boehm GC, it is
+useful to test new features available in Boehm GC, but we do not
+recommend that people use this, as it disables a few features.
* *none*:
Disables the inclusion of a garbage collector.
* This defaults to `included`.
+* `--with-cooperative-gc`
+
+ * If you pass this flag the Mono runtime is configured to only use
+ the cooperative mode of the garbage collector. If you do not pass
+ this flag, then you can control at runtime the use of the
+ cooperative GC mode by setting the `MONO_ENABLE_COOP` flag.
+
* `--with-tls=__thread,pthread`
* Controls how Mono should access thread local storage,
* Currently this is used with Mono's AOT engine as
Native Client does not support JIT engines yet.
+
+Working With Submodules
+=======================
+
+Mono references several external git submodules, for example
+a fork of Microsoft's reference source code that has been altered
+to be suitable for use with the Mono runtime.
+
+This section describes how to use it.
+
+An initial clone should be done recursively so all submodules will also be
+cloned in a single pass:
+
+ $ git clone --recursive git@github.com:mono/mono
+
+Once cloned, submodules can be updated to pull down the latest changes.
+This can also be done after an initial non-recursive clone:
+
+ $ git submodule update --init --recursive
+
+To pull external changes into a submodule:
+
+ $ cd <submodule>
+ $ git pull origin <branch>
+ $ cd <top-level>
+ $ git add <submodule>
+ $ git commit
+
+By default, submodules are detached because they point to a specific commit.
+Use `git checkout` to move back to a branch before making changes:
+
+ $ cd <submodule>
+ $ git checkout <branch>
+ # work as normal; the submodule is a normal repo
+ $ git commit/push new changes to the repo (submodule)
+
+ $ cd <top-level>
+ $ git add <submodule> # this will record the new commits to the submodule
+ $ git commit
+
+To switch the repo of a submodule (this should not be a common or normal thing
+to do at all), first edit `.gitmodules` to point to the new location, then:
+
+ $ git submodule sync -- <path of the submodule>
+ $ git submodule update --recursive
+ $ git checkout <desired new hash or branch>
+
+The desired output diff is a change in `.gitmodules` to reflect the
+change in the remote URL, and a change in /<submodule> where you see
+the desired change in the commit hash.