Exclude interrupt vector table from host build

I need a way to exclude the vector table from being linked into the
build script.  Was going to try target_arch = "arm" and realized that
it's possible for the host arch to be "arm" too.

Since the firmware is built with target_os = "none" and the build script
is built on a non-bare-metal system, I went with this as the extra
filter. It seems to be working.

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+Exclude the interrupt vector table when we're building for a target with an
+operating system. This ensures you can build imxrt-ral in different contexts,
+like build scripts.
+
 ## [0.5.2] 2023-08-02
 
 Add missing register fields:

raltool/src/generate/device.rs

@@ -200,7 +200,7 @@ name."#
             }
         }
 
-        #[cfg(feature = "rt")]
+        #[cfg(all(feature = "rt", target_os = "none"))]
         mod _vectors {
             extern "C" {
                 #(fn #names();)*

src/imxrt1011.rs

@@ -156,7 +156,7 @@ unsafe impl cortex_m::interrupt::InterruptNumber for Interrupt {
         self as u16
     }
 }
-#[cfg(feature = "rt")]
+#[cfg(all(feature = "rt", target_os = "none"))]
 mod _vectors {
     extern "C" {
         fn DMA0();

src/imxrt1015.rs

@@ -188,7 +188,7 @@ unsafe impl cortex_m::interrupt::InterruptNumber for Interrupt {
         self as u16
     }
 }
-#[cfg(feature = "rt")]
+#[cfg(all(feature = "rt", target_os = "none"))]
 mod _vectors {
     extern "C" {
         fn DMA0_DMA16();

src/imxrt1021.rs

@@ -242,7 +242,7 @@ unsafe impl cortex_m::interrupt::InterruptNumber for Interrupt {
         self as u16
     }
 }
-#[cfg(feature = "rt")]
+#[cfg(all(feature = "rt", target_os = "none"))]
 mod _vectors {
     extern "C" {
         fn DMA0_DMA16();

src/imxrt1051.rs

@@ -282,7 +282,7 @@ unsafe impl cortex_m::interrupt::InterruptNumber for Interrupt {
         self as u16
     }
 }
-#[cfg(feature = "rt")]
+#[cfg(all(feature = "rt", target_os = "none"))]
 mod _vectors {
     extern "C" {
         fn DMA0_DMA16();

src/imxrt1052.rs

@@ -288,7 +288,7 @@ unsafe impl cortex_m::interrupt::InterruptNumber for Interrupt {
         self as u16
     }
 }
-#[cfg(feature = "rt")]
+#[cfg(all(feature = "rt", target_os = "none"))]
 mod _vectors {
     extern "C" {
         fn DMA0_DMA16();

src/imxrt1061.rs

@@ -294,7 +294,7 @@ unsafe impl cortex_m::interrupt::InterruptNumber for Interrupt {
         self as u16
     }
 }
-#[cfg(feature = "rt")]
+#[cfg(all(feature = "rt", target_os = "none"))]
 mod _vectors {
     extern "C" {
         fn DMA0_DMA16();

src/imxrt1062.rs

@@ -300,7 +300,7 @@ unsafe impl cortex_m::interrupt::InterruptNumber for Interrupt {
         self as u16
     }
 }
-#[cfg(feature = "rt")]
+#[cfg(all(feature = "rt", target_os = "none"))]
 mod _vectors {
     extern "C" {
         fn DMA0_DMA16();

src/imxrt1064.rs

@@ -300,7 +300,7 @@ unsafe impl cortex_m::interrupt::InterruptNumber for Interrupt {
         self as u16
     }
 }
-#[cfg(feature = "rt")]
+#[cfg(all(feature = "rt", target_os = "none"))]
 mod _vectors {
     extern "C" {
         fn DMA0_DMA16();

src/imxrt1176_cm4.rs

@@ -432,7 +432,7 @@ unsafe impl cortex_m::interrupt::InterruptNumber for Interrupt {
         self as u16
     }
 }
-#[cfg(feature = "rt")]
+#[cfg(all(feature = "rt", target_os = "none"))]
 mod _vectors {
     extern "C" {
         fn DMA0_DMA16();

src/imxrt1176_cm7.rs

@@ -432,7 +432,7 @@ unsafe impl cortex_m::interrupt::InterruptNumber for Interrupt {
         self as u16
     }
 }
-#[cfg(feature = "rt")]
+#[cfg(all(feature = "rt", target_os = "none"))]
 mod _vectors {
     extern "C" {
         fn DMA0_DMA16();