Merge topic 'doc-requirements' into release

5b72f185 readme: mention required software
53f84904 gitlab-ci: remove unused artifact object

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Cory Quammen <cory.quammen@kitware.com>
Merge-request: !799

.gitlab/artifacts.yml

@@ -34,15 +34,6 @@
             # CDash files.
             - build/DartConfiguration.tcl
 
-.cmake_test_artifacts:
-    artifacts:
-        expire_in: 1d
-        # Tests failing should still upload the artifact for further testing.
-        when: always
-        paths:
-            # Debugging logs
-            - build/Testing/Temporary/Last*.log
-
 .cmake_package_artifacts:
     artifacts:
         expire_in: 4d

README.md

@@ -27,6 +27,22 @@ To obtain the superbuild source locally, clone this repository using
 The superbuild can be built with a Makefiles or Ninja CMake generator. The IDE
 generators (Xcode and Visual Studio) are not supported.
 
+## Requirements
+
+The superbuild tries to provide all of its own dependencies, but some tooling
+is assumed to be available on the host machine.
+
+  - Compiler toolchain
+    * GCC 4.9 or newer
+    * Xcode 10 or newer (older is probably supported, but untested)
+    * MSVC 2017 or newer
+    * ICC (minimum version unknown)
+  - Tools
+    * `pkg-config` is used on non-Windows platforms to find dependencies in
+      some projects
+    * `ninja` (or `make`) for building
+    * Python (if not built by the superbuild) for building packages
+
 ## Building a specific version
 
 The superbuild project uses the same versioning scheme as ParaView,