bump the cortex-m-rt to v0.4.0

ci/install.sh

@@ -0,0 +1,9 @@
+set -euxo pipefail
+
+main() {
+    rustup target add $TARGET
+
+    cargo install cargo-edit || true
+}
+
+main

ci/script.sh

@@ -0,0 +1,57 @@
+set -euxo pipefail
+
+main() {
+    local td=$(mktemp -d)
+
+    git clone . $td
+    pushd $td
+
+    cat >memory.x <<'EOF'
+MEMORY
+{
+  /* NOTE K = KiBi = 1024 bytes */
+  FLASH : ORIGIN = 0x08000000, LENGTH = 256K
+  RAM : ORIGIN = 0x20000000, LENGTH = 40K
+}
+EOF
+
+    local examples=(
+        crash
+        # device
+        hello
+        itm
+        override-exception-handler
+        panic
+    )
+    for ex in "${examples[@]}"; do
+        cargo build --target $TARGET --example $ex
+        cargo build --target $TARGET --example $ex --release
+    done
+
+    cargo add alloc-cortex-m
+
+    cargo build --target $TARGET --example allocator
+    cargo build --target $TARGET --example allocator --release
+
+    examples+=( allocator )
+
+    if [ $TARGET = thumbv7m-none-eabi ]; then
+        cat >>Cargo.toml <<'EOF'
+[dependencies.stm32f103xx]
+features = ["rt"]
+version = "0.9.0"
+EOF
+
+        cargo build --target $TARGET --example device
+        cargo build --target $TARGET --example device --release
+
+        examples+=( device )
+    fi
+
+    IFS=,;eval arm-none-eabi-size target/$TARGET/release/examples/"{${examples[*]}}"
+
+    popd
+    rm -rf $td
+}
+
+main