.oniro-ci,.gitlab-ci.yml: add optional clang jobs

Unqualified jobs, which rely on the default compiler, are gone. Qualified jobs explicitly configure either clang or gcc and use the appropriate suffix. Qualified jobs have needs/depends set to empty to both avoid waiting for previous stages to start and to avoid pulling in artifacts from the previous stage.

Qualified jobs inhabit two new lanes: build-gcc and build-clang, to visually break the already long column of "build" jobs.

Job ordering within a lane is not exactly matching, gcc-clang. This is noticeable with the jobs using the "extra" suffix. The reason for this is unclear.

Signed-off-by: Zygmunt Krynicki zygmunt.krynicki@huawei.com

.oniro-ci/machines-and-flavours.yaml

@@ -6,7 +6,30 @@
 
 # The following jobs are documented in docs/ci/machines-and-flavours.rst
 
-linux-qemu-x86:
+.toolchain-gcc:
+  stage: build-gcc
+  dependencies: []
+  needs: []
+  variables:
+    CI_ONIRO_BB_LOCAL_CONF_TOOLCHAIN: "gcc"
+    CI_ONIRO_BB_LOCAL_CONF_RUNTIME: "gnu"
+
+.toolchain-clang:
+  stage: build-clang
+  dependencies: []
+  needs: []
+  variables:
+    CI_ONIRO_BB_LOCAL_CONF_TOOLCHAIN: "clang"
+    CI_ONIRO_BB_LOCAL_CONF_RUNTIME: "llvm"
+  rules:
+    # Clang builds will most often than not fail, so allow them to fail until
+    # the situation improves dramatically so that the policy can be re-visited.
+    # Clang builds are also expensive, so only present the user with an option
+    # to start the build, but do not commence the build automatically.
+    - when: manual
+      allow_failure: true
+
+.linux-qemu-x86:
   extends: .build-wic-image
   variables:
     MACHINE: qemux86
@@ -20,8 +43,12 @@ linux-qemu-x86:
     # tainted build intermediate files, downloads or published artifacts.
     CI_ONIRO_BB_LOCAL_CONF_BB_GENERATE_MIRROR_TARBALLS: 1
     CI_ONIRO_JOB_ARTIFACTS: "*.wic.* *.bmap ovmf.qcow2"
+linux-qemu-x86-gcc:
+ extends: [.linux-qemu-x86, .toolchain-gcc]
+linux-qemu-x86-clang:
+ extends: [.linux-qemu-x86, .toolchain-clang]
 
-linux-qemu-x86_64:
+.linux-qemu-x86_64:
   extends: .build-wic-image
   variables:
     MACHINE: qemux86-64
@@ -31,30 +58,46 @@ linux-qemu-x86_64:
     CI_ONIRO_BUILD_CACHE: "pub"
     CI_ONIRO_BB_LOCAL_CONF_BB_GENERATE_MIRROR_TARBALLS: 1
     CI_ONIRO_JOB_ARTIFACTS: "*.wic.* *.bmap ovmf.qcow2"
+linux-qemu-x86_64-gcc:
+  extends: [.linux-qemu-x86_64, .toolchain-gcc]
+linux-qemu-x86_64-clang:
+  extends: [.linux-qemu-x86_64, .toolchain-clang]
 
-linux-seco-intel-b68:
+.linux-seco-intel-b68:
   extends: .build-wic-image
   variables:
     CI_ONIRO_BUILD_FLAVOUR: linux
     CI_ONIRO_RECIPE_NAME: oniro-image-base-tests
     MACHINE: seco-intel-b68
+linux-seco-intel-b68-gcc:
+  extends: [.linux-seco-intel-b68, .toolchain-gcc]
+linux-seco-intel-b68-clang:
+  extends: [.linux-seco-intel-b68, .toolchain-clang]
 
-linux-seco-intel-b68-extra:
+.linux-seco-intel-b68-extra:
   extends: .build-linux
   variables:
     CI_ONIRO_BUILD_FLAVOUR: linux
     CI_ONIRO_BITBAKE_TARGETS: oniro-image-extra-tests
     MACHINE: seco-intel-b68
+linux-seco-intel-b68-extra-gcc:
+  extends: [.linux-seco-intel-b68-extra, .toolchain-gcc]
+linux-seco-intel-b68-extra-clang:
+  extends: [.linux-seco-intel-b68-extra, .toolchain-clang]
 
-linux-seco-imx8mm-c61-2gb:
+.linux-seco-imx8mm-c61-2gb:
   extends: .build-linux-matrix
   variables:
     MACHINE: seco-imx8mm-c61-2gb
     # This platform requires proprietary resources to boot.
     # See build-generic.yaml for explanation of CI_ONIRO_BB_LOCAL_CONF_ variables.
     CI_ONIRO_BB_LOCAL_CONF_ACCEPT_FSL_EULA: 1
+linux-seco-imx8mm-c61-2gb-gcc:
+  extends: [.linux-seco-imx8mm-c61-2gb, .toolchain-gcc]
+linux-seco-imx8mm-c61-2gb-clang:
+  extends: [.linux-seco-imx8mm-c61-2gb, .toolchain-clang]
 
-linux-seco-imx8mm-c61-4gb:
+.linux-seco-imx8mm-c61-4gb:
   extends: .build-wic-image
   variables:
     CI_ONIRO_BUILD_FLAVOUR: linux
@@ -64,8 +107,12 @@ linux-seco-imx8mm-c61-4gb:
     # See build-generic.yaml for explanation of CI_ONIRO_BB_LOCAL_CONF_ variables.
     CI_ONIRO_BB_LOCAL_CONF_ACCEPT_FSL_EULA: 1
     CI_ONIRO_JOB_ARTIFACTS: "*.wic.* *.bmap flash.bin-seco-imx8mm-c61*"
+linux-seco-imx8mm-c61-4gb-gcc:
+  extends: [.linux-seco-imx8mm-c61-4gb, .toolchain-gcc]
+linux-seco-imx8mm-c61-4gb-clang:
+  extends: [.linux-seco-imx8mm-c61-4gb, .toolchain-clang]
 
-linux-seco-imx8mm-c61-4gb-extra:
+.linux-seco-imx8mm-c61-4gb-extra:
   extends: .build-linux
   variables:
     CI_ONIRO_BUILD_FLAVOUR: linux
@@ -74,13 +121,21 @@ linux-seco-imx8mm-c61-4gb-extra:
     # This platform requires proprietary resources to boot.
     # See build-generic.yaml for explanation of CI_ONIRO_BB_LOCAL_CONF_ variables.
     CI_ONIRO_BB_LOCAL_CONF_ACCEPT_FSL_EULA: 1
+linux-seco-imx8mm-c61-4gb-extra-gcc:
+  extends: [.linux-seco-imx8mm-c61-4gb-extra, .toolchain-gcc]
+linux-seco-imx8mm-c61-4gb-extra-clang:
+  extends: [.linux-seco-imx8mm-c61-4gb-extra, .toolchain-clang]
 
-linux-raspberrypi4-64:
+.linux-raspberrypi4-64:
   extends: .build-wic-image
   variables:
     MACHINE: raspberrypi4-64
     CI_ONIRO_BUILD_FLAVOUR: linux
     CI_ONIRO_RECIPE_NAME: oniro-image-base-tests
+linux-raspberrypi4-64-gcc:
+  extends: [.linux-raspberrypi4-64, .toolchain-gcc]
+linux-raspberrypi4-64-clang:
+  extends: [.linux-raspberrypi4-64, .toolchain-clang]
 
 zephyr-qemu-x86:
   extends: .build-zephyr-image