Merge #182

182: Add thumbv8m.main support. r=korken89 a=thejpster

* Add thumbv8m.main support.
* Also adds feature flags into build.rs so SecureFault gets included.

Co-authored-by: Jonathan 'theJPster' Pallant <github@thejpster.org.uk>

1 files changed, 15 insertions, 4 deletions

diff --git a/cortex-m-rt/examples/qemu.rs b/cortex-m-rt/examples/qemu.rs
index e2cd895..7553e70 100644
--- a/cortex-m-rt/examples/qemu.rs
+++ b/cortex-m-rt/examples/qemu.rs
@@ -2,18 +2,22 @@
 #![no_main]
 #![no_std]
 
-extern crate cortex_m;
 
+extern crate cortex_m;
 extern crate cortex_m_rt as rt;
+
+#[cfg(not(armv8m))]
 extern crate cortex_m_semihosting as semihosting;
+
 extern crate panic_halt;
 
-use core::fmt::Write;
 use cortex_m::asm;
 use rt::entry;
 
+#[cfg(not(armv8m))]
 #[entry]
 fn main() -> ! {
+    use core::fmt::Write;
     let x = 42;
 
     loop {
@@ -21,9 +25,16 @@ fn main() -> ! {
 
         // write something through semihosting interface
         let mut hstdout = semihosting::hio::hstdout().unwrap();
-        write!(hstdout, "x = {}\n", x);
-
+        write!(hstdout, "x = {}\n", x).unwrap();
         // exit from qemu
         semihosting::debug::exit(semihosting::debug::EXIT_SUCCESS);
     }
 }
+
+#[cfg(armv8m)]
+#[entry]
+fn main() -> ! {
+    loop {
+        asm::nop();
+    }
+}