Separate L4Re from Linux code, add aarch64 and enable tests

The L4Re code was previously attached to the Linux code which was not
correct in many ways. This commit separates the L4Re code and enables
the libc-tests and includes the fixes for the failing tests. Aarch64 is
added as a second supported architecture (more to come).

Author: farao

ci/run-docker.sh

@@ -47,9 +47,9 @@ run() {
         --env RUST_LIBC_UNSTABLE_GNU_TIME_BITS \
         --env CARGO_HOME=/cargo \
         --env CARGO_TARGET_DIR=/checkout/target \
-        --volume "$CARGO_HOME":/cargo \
-        --volume "$(rustc --print sysroot)":/rust:ro \
-        --volume "$PWD":/checkout:ro \
+        --volume "$CARGO_HOME":/cargo:Z \
+        --volume "$(rustc --print sysroot)":/rust:ro,Z \
+        --volume "$PWD":/checkout:ro,Z \
         --volume "$PWD"/target:/checkout/target \
         $kvm \
         --init \
@@ -78,9 +78,9 @@ build_switch() {
         --env LIBC_CI \
         --env CARGO_HOME=/cargo \
         --env CARGO_TARGET_DIR=/checkout/target \
-        --volume "$CARGO_HOME":/cargo \
-        --volume "$(rustc --print sysroot)":/rust:ro \
-        --volume "$(pwd)":/checkout:ro \
+        --volume "$CARGO_HOME":/cargo:Z \
+        --volume "$(rustc --print sysroot)":/rust:ro,Z \
+        --volume "$(pwd)":/checkout:ro,Z \
         --volume "$(pwd)"/target:/checkout/target \
         --volume ~/.rustup:/.rustup:Z \
         $kvm \

ctest/src/lib.rs

@@ -1100,6 +1100,8 @@ fn default_cfg(target: &str) -> Vec<(String, Option<String>)> {
         ("hurd", "unix", "gnu")
     } else if target.contains("cygwin") {
         ("cygwin", "unix", "")
+    } else if target.contains("l4re-uclibc") {
+        ("l4re", "unix", "uclibc")
     } else {
         panic!("unknown os/family: {target}")
     };