Adjust documentation for git migration.

This fixes most references to the paths:
 llvm.org/svn/
 llvm.org/git/
 llvm.org/viewvc/
 github.com/llvm-mirror/
 github.com/llvm-project/
 reviews.llvm.org/diffusion/

to instead point to https://github.com/llvm/llvm-project.

This is *not* a trivial substitution, because additionally, all the
checkout instructions had to be migrated to instruct users on how to
use the monorepo layout, setting LLVM_ENABLE_PROJECTS instead of
checking out various projects into various subdirectories.

I've attempted to not change any scripts here, only documentation. The
scripts will have to be addressed separately.

Additionally, I've deleted one document which appeared to be outdated
and unneeded:
  lldb/docs/building-with-debug-llvm.txt

Differential Revision: https://reviews.llvm.org/D57330

llvm-svn: 352514
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 5d71fc5d7b5ffe2323418a09db6eddaf84d6c662
diff --git a/docs/BuildingLibcxx.rst b/docs/BuildingLibcxx.rst
index a498c00..01f442d 100644
--- a/docs/BuildingLibcxx.rst
+++ b/docs/BuildingLibcxx.rst
@@ -18,33 +18,10 @@
 
 The basic steps needed to build libc++ are:
 
-#. Checkout LLVM:
-
-   * ``cd where-you-want-llvm-to-live``
-   * ``svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm``
-
-#. Checkout libc++:
-
-   * ``cd where-you-want-llvm-to-live``
-   * ``cd llvm/projects``
-   * ``svn co http://llvm.org/svn/llvm-project/libcxx/trunk libcxx``
-
-#. Checkout libc++abi:
-
-   * ``cd where-you-want-llvm-to-live``
-   * ``cd llvm/projects``
-   * ``svn co http://llvm.org/svn/llvm-project/libcxxabi/trunk libcxxabi``
-
-#. Configure and build libc++ with libc++abi:
-
-   CMake is the only supported configuration system.
-
-   Clang is the preferred compiler when building and using libc++.
-
-   * ``cd where you want to build llvm``
-   * ``mkdir build``
-   * ``cd build``
-   * ``cmake -G <generator> [options] <path to llvm sources>``
+#. Checkout and configure LLVM (including libc++ and libc++abi), according to the `LLVM
+   getting started <https://llvm.org/docs/GettingStarted.html>`_ documentation. Make sure
+   to include ``libcxx`` and ``libcxxabi`` in the ``LLVM_ENABLE_PROJECTS`` option passed
+   to CMake.
 
    For more information about configuring libc++ see :ref:`CMake Options`.
 
@@ -71,23 +48,21 @@
 FreeBSD, Linux, or Mac using `libc++abi`_ as the C++ ABI library.
 On Linux, it is also possible to use :ref:`libsupc++ <libsupcxx>` or libcxxrt.
 
-It is sometimes beneficial to build outside of the LLVM tree. An out-of-tree
-build would look like this:
+It is sometimes beneficial to build separately from the full LLVM build. An
+out-of-tree build would look like this:
 
 .. code-block:: bash
 
   $ cd where-you-want-libcxx-to-live
-  $ # Check out llvm, libc++ and libc++abi.
-  $ ``svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm``
-  $ ``svn co http://llvm.org/svn/llvm-project/libcxx/trunk libcxx``
-  $ ``svn co http://llvm.org/svn/llvm-project/libcxxabi/trunk libcxxabi``
+  $ # Check out the sources (includes everything, but we'll only use libcxx)
+  $ ``git clone https://github.com/llvm/llvm-project.git``
   $ cd where-you-want-to-build
   $ mkdir build && cd build
   $ export CC=clang CXX=clang++
-  $ cmake -DLLVM_PATH=path/to/llvm \
+  $ cmake -DLLVM_PATH=path/to/separate/llvm \
           -DLIBCXX_CXX_ABI=libcxxabi \
-          -DLIBCXX_CXX_ABI_INCLUDE_PATHS=path/to/libcxxabi/include \
-          path/to/libcxx
+          -DLIBCXX_CXX_ABI_INCLUDE_PATHS=path/to/separate/libcxxabi/include \
+          path/to/llvm-project/libcxx
   $ make
   $ make check-libcxx # optional
 
diff --git a/docs/index.rst b/docs/index.rst
index fddf74b..80c2a8d 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -190,5 +190,4 @@
 * `LLVM Bugzilla <https://bugs.llvm.org/>`_
 * `libcxx-commits Mailing List`_
 * `libcxx-dev Mailing List`_
-* `Browse libc++ -- SVN <http://llvm.org/svn/llvm-project/libcxx/trunk/>`_
-* `Browse libc++ -- ViewVC <http://llvm.org/viewvc/llvm-project/libcxx/trunk/>`_
+* `Browse libc++ Sources <https://github.com/llvm/llvm-project/tree/master/libcxx/>`_
diff --git a/www/TS_deprecation.html b/www/TS_deprecation.html
index a8dd8c1..f3c002f 100644
--- a/www/TS_deprecation.html
+++ b/www/TS_deprecation.html
@@ -25,8 +25,7 @@
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-dev">cfe-dev</a>
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-commits">cfe-commits</a>
     <a href="https://bugs.llvm.org/">Bug Reports</a>
-    <a href="https://llvm.org/svn/llvm-project/libcxx/trunk/">Browse SVN</a>
-    <a href="https://llvm.org/viewvc/llvm-project/libcxx/trunk/">Browse ViewVC</a>
+    <a href="https://github.com/llvm/llvm-project/tree/master/libcxx/">Browse Sources</a>
   </div>
 </div>
 
diff --git a/www/atomic_design.html b/www/atomic_design.html
index 1c6627a..30fb6fe 100644
--- a/www/atomic_design.html
+++ b/www/atomic_design.html
@@ -25,8 +25,7 @@
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-dev">cfe-dev</a>
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-commits">cfe-commits</a>
     <a href="https://bugs.llvm.org/">Bug Reports</a>
-    <a href="https://llvm.org/svn/llvm-project/libcxx/trunk/">Browse SVN</a>
-    <a href="https://llvm.org/viewvc/llvm-project/libcxx/trunk/">Browse ViewVC</a>
+    <a href="https://github.com/llvm/llvm-project/tree/master/libcxx/">Browse Sources</a>
   </div>
 </div>
 
diff --git a/www/atomic_design_a.html b/www/atomic_design_a.html
index 589ca83..d3e687f 100644
--- a/www/atomic_design_a.html
+++ b/www/atomic_design_a.html
@@ -25,8 +25,7 @@
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-dev">cfe-dev</a>
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-commits">cfe-commits</a>
     <a href="https://bugs.llvm.org/">Bug Reports</a>
-    <a href="https://llvm.org/svn/llvm-project/libcxx/trunk/">Browse SVN</a>
-    <a href="https://llvm.org/viewvc/llvm-project/libcxx/trunk/">Browse ViewVC</a>
+    <a href="https://github.com/llvm/llvm-project/tree/master/libcxx/">Browse Sources</a>
   </div>
 </div>
 
diff --git a/www/atomic_design_b.html b/www/atomic_design_b.html
index 7f81f8b..e07eb86 100644
--- a/www/atomic_design_b.html
+++ b/www/atomic_design_b.html
@@ -25,8 +25,7 @@
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-dev">cfe-dev</a>
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-commits">cfe-commits</a>
     <a href="https://bugs.llvm.org/">Bug Reports</a>
-    <a href="https://llvm.org/svn/llvm-project/libcxx/trunk/">Browse SVN</a>
-    <a href="https://llvm.org/viewvc/llvm-project/libcxx/trunk/">Browse ViewVC</a>
+    <a href="https://github.com/llvm/llvm-project/tree/master/libcxx/">Browse Sources</a>
   </div>
 </div>
 
diff --git a/www/atomic_design_c.html b/www/atomic_design_c.html
index 82cc80f..936ee65 100644
--- a/www/atomic_design_c.html
+++ b/www/atomic_design_c.html
@@ -25,8 +25,7 @@
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-dev">cfe-dev</a>
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-commits">cfe-commits</a>
     <a href="https://bugs.llvm.org/">Bug Reports</a>
-    <a href="https://llvm.org/svn/llvm-project/libcxx/trunk/">Browse SVN</a>
-    <a href="https://llvm.org/viewvc/llvm-project/libcxx/trunk/">Browse ViewVC</a>
+    <a href="https://github.com/llvm/llvm-project/tree/master/libcxx/">Browse Sources</a>
   </div>
 </div>
 
diff --git a/www/cxx1y_status.html b/www/cxx1y_status.html
index 0af6352..7c62dc5 100644
--- a/www/cxx1y_status.html
+++ b/www/cxx1y_status.html
@@ -25,8 +25,7 @@
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-dev">cfe-dev</a>
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-commits">cfe-commits</a>
     <a href="https://bugs.llvm.org/">Bug Reports</a>
-    <a href="https://llvm.org/svn/llvm-project/libcxx/trunk/">Browse SVN</a>
-    <a href="https://llvm.org/viewvc/llvm-project/libcxx/trunk/">Browse ViewVC</a>
+    <a href="https://github.com/llvm/llvm-project/tree/master/libcxx/">Browse Sources</a>
   </div>
 </div>
 
diff --git a/www/cxx1z_status.html b/www/cxx1z_status.html
index c2c6f7b..823c37b 100644
--- a/www/cxx1z_status.html
+++ b/www/cxx1z_status.html
@@ -25,8 +25,7 @@
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-dev">cfe-dev</a>
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-commits">cfe-commits</a>
     <a href="https://bugs.llvm.org/">Bug Reports</a>
-    <a href="https://llvm.org/svn/llvm-project/libcxx/trunk/">Browse SVN</a>
-    <a href="https://llvm.org/viewvc/llvm-project/libcxx/trunk/">Browse ViewVC</a>
+    <a href="https://github.com/llvm/llvm-project/tree/master/libcxx/">Browse Sources</a>
   </div>
 </div>
 
diff --git a/www/cxx2a_status.html b/www/cxx2a_status.html
index a5e87ec..36bc659 100644
--- a/www/cxx2a_status.html
+++ b/www/cxx2a_status.html
@@ -25,8 +25,7 @@
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-dev">cfe-dev</a>
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-commits">cfe-commits</a>
     <a href="https://bugs.llvm.org/">Bug Reports</a>
-    <a href="https://llvm.org/svn/llvm-project/libcxx/trunk/">Browse SVN</a>
-    <a href="https://llvm.org/viewvc/llvm-project/libcxx/trunk/">Browse ViewVC</a>
+    <a href="https://github.com/llvm/llvm-project/tree/master/libcxx/">Browse Sources</a>
   </div>
 </div>
 
diff --git a/www/index.html b/www/index.html
index 3724b8b..c707bc1 100644
--- a/www/index.html
+++ b/www/index.html
@@ -26,8 +26,7 @@
     <a href="https://lists.llvm.org/mailman/listinfo/libcxx-dev">libcxx-dev</a>
     <a href="https://lists.llvm.org/mailman/listinfo/libcxx-commits">libcxx-commits</a>
     <a href="https://bugs.llvm.org/">Bug Reports</a>
-    <a href="https://llvm.org/svn/llvm-project/libcxx/trunk/">Browse SVN</a>
-    <a href="https://llvm.org/viewvc/llvm-project/libcxx/trunk/">Browse ViewVC</a>
+    <a href="https://github.com/llvm/llvm-project/tree/master/libcxx/">Browse Sources</a>
   </div>
 </div>
 
diff --git a/www/ts1z_status.html b/www/ts1z_status.html
index 22ad0d4..1c2e3a2 100644
--- a/www/ts1z_status.html
+++ b/www/ts1z_status.html
@@ -25,8 +25,7 @@
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-dev">cfe-dev</a>
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-commits">cfe-commits</a>
     <a href="https://bugs.llvm.org/">Bug Reports</a>
-    <a href="https://llvm.org/svn/llvm-project/libcxx/trunk/">Browse SVN</a>
-    <a href="https://llvm.org/viewvc/llvm-project/libcxx/trunk/">Browse ViewVC</a>
+    <a href="https://github.com/llvm/llvm-project/tree/master/libcxx/">Browse Sources</a>
   </div>
 </div>
 
diff --git a/www/type_traits_design.html b/www/type_traits_design.html
index 1cab293..3b3355f 100644
--- a/www/type_traits_design.html
+++ b/www/type_traits_design.html
@@ -25,8 +25,7 @@
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-dev">cfe-dev</a>
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-commits">cfe-commits</a>
     <a href="https://bugs.llvm.org/">Bug Reports</a>
-    <a href="https://llvm.org/svn/llvm-project/libcxx/trunk/">Browse SVN</a>
-    <a href="https://llvm.org/viewvc/llvm-project/libcxx/trunk/">Browse ViewVC</a>
+    <a href="https://github.com/llvm/llvm-project/tree/master/libcxx/">Browse Sources</a>
   </div>
 </div>
 
diff --git a/www/upcoming_meeting.html b/www/upcoming_meeting.html
index f99ff14..801a92b 100644
--- a/www/upcoming_meeting.html
+++ b/www/upcoming_meeting.html
@@ -25,8 +25,7 @@
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-dev">cfe-dev</a>
     <a href="https://lists.llvm.org/mailman/listinfo/cfe-commits">cfe-commits</a>
     <a href="https://bugs.llvm.org/">Bug Reports</a>
-    <a href="https://llvm.org/svn/llvm-project/libcxx/trunk/">Browse SVN</a>
-    <a href="https://llvm.org/viewvc/llvm-project/libcxx/trunk/">Browse ViewVC</a>
+    <a href="https://github.com/llvm/llvm-project/tree/master/libcxx/">Browse Sources</a>
   </div>
 </div>