remove build dependency on arm-none-eabi-gcc

Before this commit we used gcc to assemble external assembly files into object
files that we linked into our Rust program.

This commit drops the dependency on gcc by shipping the already assembled object
files with this crate source code.

1 files changed, 17 insertions, 0 deletions

diff --git a/cortex-m-rt/assemble.sh b/cortex-m-rt/assemble.sh
new file mode 100755
index 0000000..f2ee3fd
--- /dev/null
+++ b/cortex-m-rt/assemble.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+set -euxo pipefail
+
+# cflags taken from cc 1.0.22
+
+arm-none-eabi-as -march=armv6s-m asm.s -o bin/cortex-m-rt.o
+ar crs bin/thumbv6m-none-eabi.a bin/cortex-m-rt.o
+
+arm-none-eabi-as -march=armv7-m asm.s -o bin/cortex-m-rt.o
+ar crs bin/thumbv7m-none-eabi.a bin/cortex-m-rt.o
+
+arm-none-eabi-as -march=armv7e-m asm.s -o bin/cortex-m-rt.o
+ar crs bin/thumbv7em-none-eabi.a bin/cortex-m-rt.o
+ar crs bin/thumbv7em-none-eabihf.a bin/cortex-m-rt.o
+
+rm bin/cortex-m-rt.o