Add an example using c-gull and panic = "abort".

example-crates/c-gull-example-panic-abort/.gitignore

@@ -0,0 +1,2 @@
+/target
+Cargo.lock

example-crates/c-gull-example-panic-abort/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "c-gull-example-panic-abort"
+version = "0.0.0"
+edition = "2021"
+publish = false
+
+[dependencies.libc]
+path = "../../c-gull"
+default-features = false
+features = [
+    "take-charge",
+    "std",
+    "thread",
+    "call-main",
+    "malloc-via-crates",
+    "threadsafe-setenv"
+]
+package = "c-gull"
+
+[profile.dev]
+panic = "abort"
+[profile.release]
+panic = "abort"
+
+# This is just an example crate, and not part of the c-ward workspace.
+[workspace]

example-crates/c-gull-example-panic-abort/README.md

@@ -0,0 +1,3 @@
+Like the [c-gull-example example], but uses panic=abort in Cargo.toml.
+
+[c-gull-example example]: https://github.com/sunfishcode/c-ward/blob/main/example-crates/c-gull-example/README.md

example-crates/c-gull-example-panic-abort/build.rs

@@ -0,0 +1,4 @@
+fn main() {
+    // Pass -nostartfiles to the linker.
+    println!("cargo:rustc-link-arg=-nostartfiles");
+}

example-crates/c-gull-example-panic-abort/src/main.rs

@@ -0,0 +1,8 @@
+//! A simple example using "take-charge" mode.
+
+fn main() {
+    println!("Hello world using Rust `println!`!");
+    unsafe {
+        libc::printf("Hello world using libc `printf`!\n\0".as_ptr().cast());
+    }
+}

tests/example_crates.rs

@@ -73,6 +73,18 @@ fn example_crate_c_gull_example() {
     );
 }
 
+#[test]
+fn example_crate_c_gull_example_panic_abort() {
+    test_crate(
+        "c-gull-example-panic-abort",
+        &[],
+        &[],
+        "Hello world using Rust `println!`!\nHello world using libc `printf`!\n",
+        "",
+        None,
+    );
+}
+
 #[test]
 fn example_crate_c_gull_lto() {
     test_crate(