Remove prebuilt cortex-m-rt binaries, replace with global_asm

Author: adamgreig

.github/bors.toml

@@ -5,7 +5,7 @@ status = [
   "ci-linux (stable)",
   "ci-linux (1.59.0)",
   "rt-ci-linux (stable)",
-  "rt-ci-linux (1.42.0)",
+  "rt-ci-linux (1.59.0)",
   "rt-ci-other-os (macOS-latest)",
   "rt-ci-other-os (windows-latest)",
   "rustfmt",

.github/workflows/rt-ci.yml

@@ -11,8 +11,7 @@ jobs:
     continue-on-error: ${{ matrix.experimental || false }}
     strategy:
       matrix:
-        # All generated code should be running on stable now
-        rust: [nightly, stable, 1.42.0]
+        rust: [nightly, stable, 1.59.0]
 
         include:
           # Nightly is only for reference and allowed to fail

cortex-m-rt/CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+- Moved precompiled assembly blobs to `global_asm!`, requiring Rust 1.59.
+
 ## Fixes
 
 - Fix `cortex_m_rt::exception` macro no longer being usable fully-qualified ([#414])

cortex-m-rt/README.md

@@ -11,7 +11,7 @@ This project is developed and maintained by the [Cortex-M team][team].
 
 # Minimum Supported Rust Version (MSRV)
 
-This crate is guaranteed to compile on stable Rust 1.42.0 and up. It *might*
+This crate is guaranteed to compile on stable Rust 1.59.0 and up. It *might*
 compile with older versions but that may change in any new patch release.
 
 # License