not sure how to fill in panic runtime bit

Author: Kyle Strand

src/destructors.md

@@ -221,6 +221,8 @@ scope of the expression with that operand. Since the temporaries are moved from
 once the expression is evaluated, dropping them has no effect unless one of the
 operands to an expression breaks out of the expression, returns, or panics.
 
+<!-- XXX note about panic=abort here? -->
+
 ```rust
 # struct PrintOnDrop(&'static str);
 # impl Drop for PrintOnDrop {

src/linkage.md

@@ -219,8 +219,8 @@ both of the following characteristics:
 * It contains a call to an `-unwind` foreign function or function pointer
 * It was compiled with `panic=unwind`
 
-Note: `cargo` will automatically unify all crates to use the same `panic`
-runtime, so this prohibition does not apply to projects compiled with `cargo`.
+Note: Cargo will automatically unify all crates to use the same `panic`
+runtime, so this prohibition does not apply to projects compiled with Cargo.
 
 <!-- TODO: edit the above to indicate that this prohibition is enforced by
 `rustc` once https://github.com/rust-lang/rust/pull/97235 has been merged -->

src/panic-runtime.md

@@ -1,6 +1,14 @@
 # Panic runtimes
 
-XXX fill me in... then link here from `FFI` and `linkage` pages
+XXX fill me in... 
+
+`rustc` option: `-C panic=<foo>`
 
 `panic=abort`
-`panic=unwind`
+`panic=unwind` (default)
+
+With `panic=abort`:
+* Cleanup code (`Drop`) can't be called
+* Panics can't be caught with `catch_unwind`
+
+Cargo unifies panic runtimes