Rollup merge of #39400 - alexcrichton:arm-cross-test, r=brson

Add support for test suites emulated in QEMU

This commit adds support to the build system to execute test suites that cannot
run natively but can instead run inside of a QEMU emulator. A proof-of-concept
builder was added for the `arm-unknown-linux-gnueabihf` target to show off how
this might work.

In general the architecture is to have a server running inside of the emulator
which a local client connects to. The protocol between the server/client
supports compiling tests on the host and running them on the target inside the
emulator.

Closes #33114

1 files changed, 1 insertions, 1 deletions

diff --git a/src/test/run-pass/fds-are-cloexec.rs b/src/test/run-pass/fds-are-cloexec.rs
index 0abe44d8259..a1b7d42a196 100644
--- a/src/test/run-pass/fds-are-cloexec.rs
+++ b/src/test/run-pass/fds-are-cloexec.rs
@@ -35,7 +35,7 @@ fn main() {
 }
 
 fn parent() {
-    let file = File::open(file!()).unwrap();
+    let file = File::open(env::current_exe().unwrap()).unwrap();
     let tcp1 = TcpListener::bind("127.0.0.1:0").unwrap();
     let tcp2 = tcp1.try_clone().unwrap();
     let addr = tcp1.local_addr().unwrap();