Add Flang builder for latest llvm and libc++.

[gkistanova]

Looks good with a couple nit picks.
Please see my comments in line.

buildbot/osuosl/master/config/builders.py

1517

Having a particular version of clang in the builder name looks too restrictive for future changes. You might want to change that to 12 in 6 months or so.

1534

How about using variants or specify a link to a particular clang version, so you could update the clang on the worker without changing the builders.py when you will want to use more recent version in the future?

[stevanradakovic]

Change clang version to 10 since that one is the newest one
available for bionic (which we use for workers).

[stevanradakovic]

Update clang and builder version to a generic name.

[stevanradakovic]

Update clang and builder version to generic name.

[stevanradakovic]

Thanks for the review @gkistanova !

buildbot/osuosl/master/config/builders.py

1534

How does this look? My plan is on the worker side to have this point to the latest version of clang.

[awarzynski]

@stevanradakovic , thank you for adding this!

buildbot/osuosl/master/config/builders.py

1516

I think that adding aarch64 here (and perhaps release) would help navigating http://lab.llvm.org:8011/.

1533

IIUC, Release is the default, see here. Personally I prefer being explicit, so this is just as an FYI :)

[stevanradakovic]

Update clang and builder version to generic name.

Add additional tags for builder.

[stevanradakovic]

@awarzynski you're welcome. Is it ok to merge now?

[awarzynski]

@stevanradakovic 👍

buildbot/osuosl/master/config/builders.py

'factory' : UnifiedTreeBuilder.getCmakeWithNinjaBuildFactory(
                     depends_on_projects=['llvm','mlir','clang','flang'],
                     extra_configure_args=[
                         "-DLLVM_TARGETS_TO_BUILD=AArch64",
                         "-DFLANG_BUILD_NEW_DRIVER=ON",
                         "-DCMAKE_BUILD_TYPE=Debug",
                         "-DCMAKE_CXX_STANDARD=17",
                     ])},
 
+    {'name' : "flang-aarch64-ubuntu-latest-clang",
+    'tags'  : ['flang', 'aarch64', 'release'],
+    'workernames' : ["linaro-aarch64-flang-latest-clang"],
+    'builddir': "flang-aarch64-ubuntu-latest-clang",
+    'factory' : UnifiedTreeBuilder.getCmakeWithNinjaBuildFactory(
+                    clean=True,
+                    checks=['check-flang'],
+                    depends_on_projects=['llvm','mlir','clang','flang'],
+                    extra_configure_args=[
+                        "-DLLVM_TARGETS_TO_BUILD=AArch64",
+                        "-DLLVM_INSTALL_UTILS=ON",
+                        "-DCMAKE_CXX_STANDARD=17",
+                        "-DLLVM_ENABLE_WERROR=OFF",
+                        "-DFLANG_ENABLE_WERROR=ON",
+                        "-DBUILD_SHARED_LIBS=ON",
+                        "-DLLVM_ENABLE_ASSERTIONS=ON",
+                        "-DLLVM_ENABLE_LIBCXX=On",
+                        "-DFLANG_BUILD_NEW_DRIVER=ON",
+                        "-DCMAKE_BUILD_TYPE=Release",
+                        "-DCMAKE_C_COMPILER=/usr/bin/clang",
+                        "-DCMAKE_CXX_COMPILER=/usr/bin/clang++",
+                        ])},
+
     {'name' : "flang-aarch64-ubuntu-release",
     'tags'  : ["flang"],
     'workernames' : ["linaro-aarch64-flang-release"],
     'builddir': "flang-aarch64-release",
     'factory' : UnifiedTreeBuilder.getCmakeWithNinjaBuildFactory(
                     clean=True,
                     checks=['check-flang'],
                     depends_on_projects=['llvm','mlir','clang','flang'],

buildbot/osuosl/master/config/workers.py

return [
         # AArch64 Linaro workers
         create_worker("linaro-aarch64-quick", properties={'jobs' : 32}, max_builds=1),
         create_worker("linaro-aarch64-full", properties={'jobs' : 32}, max_builds=1),
         create_worker("linaro-aarch64-global-isel", properties={'jobs' : 32}, max_builds=1),
         create_worker("linaro-aarch64-lld", properties={'jobs' : 32}, max_builds=1),
         create_worker("linaro-aarch64-flang-oot", properties={'jobs' : 32}, max_builds=1),
         create_worker("linaro-aarch64-flang-oot-new-driver", properties={'jobs' : 32}, max_builds=1),
         create_worker("linaro-aarch64-flang-debug", properties={'jobs' : 32}, max_builds=1),
+        create_worker("linaro-aarch64-flang-latest-clang", properties={'jobs' : 32}, max_builds=1),
         create_worker("linaro-aarch64-flang-release", properties={'jobs' : 32}, max_builds=1),
         create_worker("linaro-aarch64-flang-rel-assert", properties={'jobs' : 32}, max_builds=1),
         create_worker("linaro-aarch64-flang-dylib", properties={'jobs' : 32}, max_builds=1),
         create_worker("linaro-aarch64-flang-sharedlibs", properties={'jobs' : 32}, max_builds=1),
         create_worker("linaro-aarch64-flang-latest-gcc", properties={'jobs' : 32}, max_builds=1),
         # Libcxx testsuite has tests with timing assumptions.  Run single-threaded to make
         # sure we have plenty CPU cycle to satisfy timing assumptions.
         create_worker("linaro-aarch64-libcxx", properties={'jobs' : 1}, max_builds=1),