Merge #306

306: fix #74 r=jonas-schievink a=spookyvision

special-cased linker section names to satisfy macos linker constraints

Co-authored-by: Anatol Ulrich <anatol.ulrich@ferrous-systems.com>

Author: bors[bot]

cortex-m-rt/.github/workflows/ci.yml

@@ -64,17 +64,19 @@ jobs:
           override: true
       - name: Install all Rust targets
         run: rustup target install thumbv6m-none-eabi thumbv7m-none-eabi thumbv7em-none-eabi thumbv7em-none-eabihf thumbv8m.base-none-eabi thumbv8m.main-none-eabi thumbv8m.main-none-eabihf
-      - name: Build crate for thumbv6m-none-eabi
+      - name: Build examples for thumbv6m-none-eabi
         run: cargo build --target=thumbv6m-none-eabi --examples
-      - name: Build crate for thumbv7m-none-eabi
+      - name: Build examples for thumbv7m-none-eabi
         run: cargo build --target=thumbv7m-none-eabi --examples
-      - name: Build crate for thumbv7em-none-eabi
+      - name: Build examples for thumbv7em-none-eabi
         run: cargo build --target=thumbv7em-none-eabi --examples
-      - name: Build crate for thumbv7em-none-eabihf
+      - name: Build examples for thumbv7em-none-eabihf
         run: cargo build --target=thumbv7em-none-eabihf --examples
-      - name: Build crate for thumbv8m.base-none-eabi
+      - name: Build examples for thumbv8m.base-none-eabi
         run: cargo build --target=thumbv8m.base-none-eabi --examples
-      - name: Build crate for thumbv8m.main-none-eabi
+      - name: Build examples for thumbv8m.main-none-eabi
         run: cargo build --target=thumbv8m.main-none-eabi --examples
-      - name: Build crate for thumbv8m.main-none-eabihf
+      - name: Build examples for thumbv8m.main-none-eabihf
         run: cargo build --target=thumbv8m.main-none-eabihf --examples
+      - name: Build crate for host OS
+        run: cargo build

cortex-m-rt/macros/src/lib.rs

@@ -266,7 +266,8 @@ pub fn exception(args: TokenStream, input: TokenStream) -> TokenStream {
                 #(#attrs)*
                 #[doc(hidden)]
                 #[export_name = "HardFault"]
-                #[link_section = ".HardFault.user"]
+                #[cfg_attr(target_os = "macos", link_section = ".HardFault,user")]
+                #[cfg_attr(not(target_os = "macos"), link_section = ".HardFault.user")]
                 pub unsafe extern "C" fn #tramp_ident(frame: &::cortex_m_rt::ExceptionFrame) {
                     #ident(frame)
                 }

cortex-m-rt/src/lib.rs

@@ -910,13 +910,15 @@ pub fn heap_start() -> *mut u32 {
 
 // Entry point is Reset.
 #[doc(hidden)]
-#[link_section = ".vector_table.reset_vector"]
+#[cfg_attr(target_os = "macos", link_section = ".vector_table,reset_vector")]
+#[cfg_attr(not(target_os = "macos"), link_section = ".vector_table.reset_vector")]
 #[no_mangle]
 pub static __RESET_VECTOR: unsafe extern "C" fn() -> ! = Reset;
 
 #[allow(unused_variables)]
 #[doc(hidden)]
-#[link_section = ".HardFault.default"]
+#[cfg_attr(target_os = "macos", link_section = ".HardFault,default")]
+#[cfg_attr(not(target_os = "macos"), link_section = ".HardFault.default")]
 #[no_mangle]
 pub unsafe extern "C" fn HardFault_(ef: &ExceptionFrame) -> ! {
     loop {
@@ -1008,7 +1010,8 @@ pub union Vector {
 }
 
 #[doc(hidden)]
-#[link_section = ".vector_table.exceptions"]
+#[cfg_attr(target_os = "macos", link_section = ".vector_table,exceptions")]
+#[cfg_attr(not(target_os = "macos"), link_section = ".vector_table.exceptions")]
 #[no_mangle]
 pub static __EXCEPTIONS: [Vector; 14] = [
     // Exception 2: Non Maskable Interrupt.
@@ -1070,7 +1073,8 @@ pub static __EXCEPTIONS: [Vector; 14] = [
 // to the default handler
 #[cfg(all(any(not(feature = "device"), test), not(armv6m)))]
 #[doc(hidden)]
-#[link_section = ".vector_table.interrupts"]
+#[cfg_attr(target_os = "macos", link_section = ".vector_table,interrupts")]
+#[cfg_attr(not(target_os = "macos"), link_section = ".vector_table.interrupts")]
 #[no_mangle]
 pub static __INTERRUPTS: [unsafe extern "C" fn(); 240] = [{
     extern "C" {