Enable -Cpanic=unwind by default

Please do not review. I need to work on this project alone.

Author: bjorn3

build_system/build_sysroot.rs

@@ -231,7 +231,7 @@ fn build_clif_sysroot_for_triple(
     }
 
     // Build sysroot
-    let mut rustflags = vec!["-Zforce-unstable-if-unmarked".to_owned(), "-Cpanic=abort".to_owned()];
+    let mut rustflags = vec!["-Zforce-unstable-if-unmarked".to_owned()];
     match cg_clif_dylib_path {
         CodegenBackend::Local(path) => {
             rustflags.push(format!("-Zcodegen-backend={}", path.to_str().unwrap()));

build_system/tests.rs

@@ -432,7 +432,6 @@ impl<'a> TestRunner<'a> {
         cmd.arg("-Cdebuginfo=2");
         cmd.arg("--target");
         cmd.arg(&self.target_compiler.triple);
-        cmd.arg("-Cpanic=abort");
         cmd.arg("-Zunstable-options");
         cmd.arg("--check-cfg=cfg(jit)");
         cmd.args(args);

example/alloc_example.rs

@@ -23,6 +23,11 @@ fn panic_handler(_: &core::panic::PanicInfo<'_>) -> ! {
     core::intrinsics::abort();
 }
 
+#[lang = "eh_personality"]
+fn eh_personality() -> ! {
+    core::intrinsics::abort();
+}
+
 #[alloc_error_handler]
 fn alloc_error_handler(_: alloc::alloc::Layout) -> ! {
     core::intrinsics::abort();

scripts/cargo-clif.rs

@@ -12,7 +12,7 @@ fn main() {
         sysroot = sysroot.parent().unwrap();
     }
 
-    let mut rustflags = vec!["-Cpanic=abort".to_owned(), "-Zpanic-abort-tests".to_owned()];
+    let mut rustflags = vec![];
     if let Some(name) = option_env!("BUILTIN_BACKEND") {
         rustflags.push(format!("-Zcodegen-backend={name}"));
     } else {

scripts/rustc-clif.rs

@@ -17,8 +17,6 @@ fn main() {
 
     let passed_args = std::env::args_os().skip(1).collect::<Vec<_>>();
     let mut args = vec![];
-    args.push(OsString::from("-Cpanic=abort"));
-    args.push(OsString::from("-Zpanic-abort-tests"));
     if let Some(name) = option_env!("BUILTIN_BACKEND") {
         args.push(OsString::from(format!("-Zcodegen-backend={name}")))
     } else {

scripts/rustdoc-clif.rs

@@ -17,8 +17,6 @@ fn main() {
 
     let passed_args = std::env::args_os().skip(1).collect::<Vec<_>>();
     let mut args = vec![];
-    args.push(OsString::from("-Cpanic=abort"));
-    args.push(OsString::from("-Zpanic-abort-tests"));
     if let Some(name) = option_env!("BUILTIN_BACKEND") {
         args.push(OsString::from(format!("-Zcodegen-backend={name}")))
     } else {