tools/ci.sh: Update Unix/MIPS target to Ubuntu 24.04 LTS.

This commit updates the Unix/MIPS target's environment to use the latest
available LTS version of Ubuntu Linux (24.04).

Since the new OS updated some key components used in the CI build
process, a few modifications have been made to the setup and build
procedure.  Newer QEMU's sysroot location changed and the "static"
variant of the QEMU emulators has to be used to make binfmt work, and
updated autotools versions split some macros into an optional package
that has to be manually installed.

Signed-off-by: Alessandro Gatti <a.gatti@frob.it>

Author: agatti

.github/workflows/ports_unix.yml

@@ -247,10 +247,14 @@ jobs:
       run: tests/run-tests.py --print-failures
 
   qemu_mips:
-    # ubuntu-22.04 is needed for older libffi.
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v6
+    - uses: actions/setup-python@v6
+      # Python 3.12 is the default for ubuntu-24.04, but that has compatibility issues with settrace tests.
+      # Can remove this step when ubuntu-latest uses a more recent Python 3.x as the default.
+      with:
+        python-version: '3.11'
     - name: Install packages
       run: tools/ci.sh unix_qemu_mips_setup
     - name: Build

tools/ci.sh

@@ -913,11 +913,11 @@ function ci_unix_macos_run_tests {
 
 function ci_unix_qemu_mips_setup {
     sudo apt-get update
-    sudo apt-get install gcc-mips-linux-gnu g++-mips-linux-gnu libc6-mips-cross
-    sudo apt-get install qemu-user
-    qemu-mips --version
-    sudo mkdir /etc/qemu-binfmt
-    sudo ln -s /usr/mips-linux-gnu/ /etc/qemu-binfmt/mips
+    sudo apt-get install gcc-mips-linux-gnu g++-mips-linux-gnu libc6-mips-cross libltdl-dev
+    sudo apt-get install qemu-user-static
+    qemu-mips-static --version
+    sudo mkdir -p /usr/gnemul
+    sudo ln -s /usr/mips-linux-gnu /usr/gnemul/qemu-mips
 }
 
 function ci_unix_qemu_mips_build {
@@ -927,11 +927,11 @@ function ci_unix_qemu_mips_build {
 
 function ci_unix_qemu_mips_run_tests {
     # Issues with MIPS tests:
-    # - thread/stress_aes.py takes around 50 seconds
+    # - thread/stress_aes.py takes around 90 seconds
     # - thread/stress_recurse.py is flaky
     # - thread/thread_gc1.py is flaky
     file ./ports/unix/build-coverage/micropython
-    (cd tests && MICROPY_MICROPYTHON=../ports/unix/build-coverage/micropython MICROPY_TEST_TIMEOUT=90 ./run-tests.py --exclude 'thread/stress_recurse.py|thread/thread_gc1.py')
+    (cd tests && MICROPY_MICROPYTHON=../ports/unix/build-coverage/micropython MICROPY_TEST_TIMEOUT=180 ./run-tests.py --exclude 'thread/stress_recurse.py|thread/thread_gc1.py')
 }
 
 function ci_unix_qemu_arm_setup {