Merge #3

3: Document MSRV in README and test on Rust stable r=paoloteti a=eldruin

I documented the MSRV in accordance with rust-embedded/wg#445
I also added Rust stable to the build matrix as I think this would be useful. Maybe nightly or beta would also be interesting.

Co-authored-by: Diego Barrios Romero <[email protected]>

Author: bors[bot]

.travis.yml

@@ -2,6 +2,27 @@ language: rust
 
 matrix:
   include:
+    - env: TARGET=x86_64-unknown-linux-gnu
+      if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
+      rust: stable
+
+    - env: TARGET=armebv7r-none-eabi
+      if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
+      rust: stable
+
+    - env: TARGET=armebv7r-none-eabihf
+      if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
+      rust: stable
+
+    - env: TARGET=armv7r-none-eabi
+      if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
+      rust: stable
+
+    - env: TARGET=armv7r-none-eabihf
+      if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
+      rust: stable
+
+    # MSRV
     - env: TARGET=x86_64-unknown-linux-gnu
       if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
       rust: 1.31.0

README.md

@@ -4,6 +4,11 @@
 
 This project is developed and maintained by the [Cortex-R team][team].
 
+## Minimum Supported Rust Version (MSRV)
+
+This crate is guaranteed to compile on stable Rust 1.31.0 and up. It *might*
+compile with older versions but that may change in any new patch release.
+
 ## License
 
 Licensed under either of