Clang 21

.circleci/config.yml

@@ -51,8 +51,8 @@ jobs:
       - image: ubuntu:25.04
     resource_class: arm.medium
     environment:
-      CC: clang-20
-      CXX: clang++-20
+      CC: clang-21
+      CXX: clang++-21
     steps:
       - run: |
           apt-get update --quiet=2 || apt-get update --quiet=2 || apt-get update --quiet=2
@@ -62,14 +62,16 @@ jobs:
           export REPO_HTTPS=`echo "$CIRCLE_REPOSITORY_URL" | sed "s|git@github.com:|https://github.com/|g"`
           git clone -b "$CIRCLE_BRANCH" "$REPO_HTTPS" . --depth=1
       - run: |
-          sudo apt-get install -y gnupg wget # Only needed in container.
+          # tzdata is required by clang and software-properties-common and has to be installed carefully to avoid user prompts stalling the script.
+          ln -fs /usr/share/zoneinfo/America/New_York /etc/localtime
+          DEBIAN_FRONTEND=noninteractive sudo apt-get install -y --no-install-recommends tzdata
+          sudo apt-get install -y wget software-properties-common # Only needed in container.
           sudo apt-get install -y gcc-15 g++-15
           sudo apt-get install -y cmake
           sudo apt-get install -y hwloc libhwloc-dev
-          # tzdata is required by clang and has to be installed carefully to avoid user prompts stalling the script.
-          ln -fs /usr/share/zoneinfo/America/New_York /etc/localtime
-          DEBIAN_FRONTEND=noninteractive sudo apt-get install -y --no-install-recommends tzdata
-          sudo apt-get install -y clang-20
+          wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | sudo tee /etc/apt/trusted.gpg.d/apt.llvm.org.asc
+          sudo apt-add-repository -y 'deb https://apt.llvm.org/plucky/ llvm-toolchain-plucky-21 main'
+          sudo apt-get install -y clang-21
       - run: |
           mkdir build
           cd build
@@ -95,8 +97,8 @@ jobs:
       - image: ubuntu:25.04
     resource_class: arm.medium
     environment:
-      CC: clang-20
-      CXX: clang++-20
+      CC: clang-21
+      CXX: clang++-21
       CFLAGS: "-fsanitize=<< parameters.sanitizer >> -fno-sanitize-recover=all"
       CXXFLAGS: "-fsanitize=<< parameters.sanitizer >> -fno-sanitize-recover=all"
       LDFLAGS: "-fsanitize=<< parameters.sanitizer >> -fno-sanitize-recover=all"
@@ -111,14 +113,16 @@ jobs:
           export REPO_HTTPS=`echo "$CIRCLE_REPOSITORY_URL" | sed "s|git@github.com:|https://github.com/|g"`
           git clone -b "$CIRCLE_BRANCH" "$REPO_HTTPS" . --depth=1
       - run: |
-          sudo apt-get install -y gnupg wget # Only needed in container.
+          # tzdata is required by clang and software-properties-common and has to be installed carefully to avoid user prompts stalling the script.
+          ln -fs /usr/share/zoneinfo/America/New_York /etc/localtime
+          DEBIAN_FRONTEND=noninteractive sudo apt-get install -y --no-install-recommends tzdata
+          sudo apt-get install -y wget software-properties-common # Only needed in container.
           sudo apt-get install -y gcc-15 g++-15
           sudo apt-get install -y cmake
           sudo apt-get install -y hwloc libhwloc-dev
-          # tzdata is required by clang and has to be installed carefully to avoid user prompts stalling the script.
-          ln -fs /usr/share/zoneinfo/America/New_York /etc/localtime
-          DEBIAN_FRONTEND=noninteractive sudo apt-get install -y --no-install-recommends tzdata
-          sudo apt-get install -y clang-20
+          wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | sudo tee /etc/apt/trusted.gpg.d/apt.llvm.org.asc
+          sudo apt-add-repository -y 'deb https://apt.llvm.org/plucky/ llvm-toolchain-plucky-21 main'
+          sudo apt-get install -y clang-21
       - run: |
           mkdir build
           cd build

.cirrus.yml

@@ -38,17 +38,15 @@ osx_m1_task:
     export CXXFLAGS="-g -I$(brew --prefix)/include $CXXFLAGS"
     export LDFLAGS="-g -L$(brew --prefix)/lib $LDFLAGS"
     mkdir build
-    pushd build
+    cd build
     cmake -DCMAKE_BUILD_TYPE=Release -DQTHREADS_SCHEDULER=$QTHREADS_SCHEDULER -DQTHREADS_TOPOLOGY=$QTHREADS_TOPOLOGY ..
     make -j$CIRRUS_CPU VERBOSE=1
-    popd
   test_script: |
     # commented example for how to get a backtrace from CI usign lldb on OSX:
     #echo "settings set target.process.stop-on-exec false" > ~/.lldbinit
     #QT_NUM_SHEPHERDS=2 QT_NUM_WORKERS_PER_SHEPHERD=1 lldb bash --batch --one-line 'process launch' --one-line-on-crash 'bt' --one-line-on-crash 'quit' -- test/basics/hello_world
-    pushd build
+    cd build
     CTEST_OUTPUT_ON_FAILURE=1 gtimeout --foreground 3m make test VERBOSE=1
-    popd
 
 freebsd_task:
   freebsd_instance:
@@ -70,6 +68,7 @@ freebsd_task:
     cmake -DCMAKE_BUILD_TYPE=Release -DQTHREADS_SCHEDULER=$QTHREADS_SCHEDULER -DQTHREADS_TOPOLOGY=no -DQTHREADS_CONTEXT_SWAP_IMPL=system ..
     make -j$CIRRUS_CPU VERBOSE=1
   test_script: |
+    cd build
     CTEST_OUTPUT_ON_FAILURE=1 gtimeout --foreground -k 10s 2m make test VERBOSE=1
 
 arm_linux_task:
@@ -98,43 +97,41 @@ arm_linux_task:
     apt-get install -y hwloc libhwloc-dev
   build_script: |
     mkdir build
-    pushd build
+    cd build
     cmake -DCMAKE_BUILD_TYPE=Release -DQTHREADS_SCHEDULER=$QTHREADS_SCHEDULER -DQTHREADS_TOPOLOGY=$QTHREADS_TOPOLOGY ..
     make -j$CIRRUS_CPU VERBOSE=1
-    popd
   test_script: |
-    pushd build
+    cd build
     CTEST_OUTPUT_ON_FAILURE=1 timeout --foreground -k 10s 5m make test VERBOSE=1
-    popd
 
 arm_linux_clang_task:
   arm_container:
     image: gcc:15-bookworm
   timeout_in: 5m
   matrix:
     env:
-      CC: clang-20
-      CXX: clang++-20
+      CC: clang-21
+      CXX: clang++-21
       QTHREADS_SCHEDULER: nemesis
       QTHREADS_TOPOLOGY: no
     env:
-      CC: clang-20
-      CXX: clang++-20
+      CC: clang-21
+      CXX: clang++-21
       QTHREADS_SCHEDULER: nemesis
       QTHREADS_TOPOLOGY: hwloc
     env:
-      CC: clang-20
-      CXX: clang++-20
+      CC: clang-21
+      CXX: clang++-21
       QTHREADS_SCHEDULER: nemesis
       QTHREADS_TOPOLOGY: binders
     env:
-      CC: clang-20
-      CXX: clang++-20
+      CC: clang-21
+      CXX: clang++-21
       QTHREADS_SCHEDULER: sherwood
       QTHREADS_TOPOLOGY: no
     env:
-      CC: clang-20
-      CXX: clang++-20
+      CC: clang-21
+      CXX: clang++-21
       QTHREADS_SCHEDULER: distrib
       QTHREADS_TOPOLOGY: no
   install_deps_script: |
@@ -145,19 +142,17 @@ arm_linux_clang_task:
     gpg --no-default-keyring --keyring ./tmp.gpg --export --output llvm-snapshot.gpg
     rm tmp.gpg
     cp llvm-snapshot.gpg /etc/apt/trusted.gpg.d/llvm-snapshot.gpg # This is for CI so no need to do something more complicated to restrict key use to a specific repo.
-    apt-add-repository -y 'deb https://apt.llvm.org/bookworm/ llvm-toolchain-bookworm-20 main'
-    apt-add-repository -y 'deb https://apt.llvm.org/bookworm/ llvm-toolchain-bookworm-20 main' # Something's buggy upstream but running this twice fixes it.
-    apt-get install -y clang-20
+    apt-add-repository -y 'deb https://apt.llvm.org/bookworm/ llvm-toolchain-bookworm-21 main'
+    apt-add-repository -y 'deb https://apt.llvm.org/bookworm/ llvm-toolchain-bookworm-21 main' # Something's buggy upstream but running this twice fixes it.
+    apt-get install -y clang-21
     apt-get install -y cmake
     apt-get install -y hwloc libhwloc-dev
   build_script: |
     mkdir build
-    pushd build
+    cd build
     cmake -DCMAKE_BUILD_TYPE=Release -DQTHREADS_SCHEDULER=$QTHREADS_SCHEDULER -DQTHREADS_TOPOLOGY=$QTHREADS_TOPOLOGY ..
     make -j$CIRRUS_CPU VERBOSE=1
-    popd
   test_script: |
-    pushd build
+    cd build
     CTEST_OUTPUT_ON_FAILURE=1 timeout --foreground -k 10s 5m make test VERBOSE=1
-    popd
 

.git-blame-ignore-revs

@@ -3,3 +3,4 @@
 d1196d946c6551b205791f47ee952412e1a3e9bc
 2368ba6baaeb986a16d7444edf412e3ef74296b4
 163756c0337619255bb4b30a0b8ef21d17824aab
+8800d6becb5181f539155ec62c635eb339b3f6cd