Add Flang builder for latest gcc.

[gkistanova]

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

buildbot/osuosl/master/config/builders.py

1548

Having a particular version of gcc in the builder name looks too restrictive for future changes. Why not have it as linaro-aarch64-flang-gcc? Looks descriptive enough, unless you plan to have multiple builders for different versions of gcc running simultaneously.

1555

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

[stevanradakovic]

Update generic name for builder and for gcc binary.

[stevanradakovic]

Thanks for the review @gkistanova !

[awarzynski]

Thank you for adding this @stevanradakovic !

buildbot/osuosl/master/config/builders.py

1547

Would it be OK to have more tags here? E.g. aarch64 and release?

[stevanradakovic]

Add additional tags for builder.

[stevanradakovic]

Add check-flang to latest gcc build.

[stevanradakovic]

@awarzynski nice suggestion. Is it ok to merge now?

[awarzynski]

@stevanradakovic thanks a ton!

buildbot/osuosl/master/config/builders.py

'factory' : UnifiedTreeBuilder.getCmakeWithNinjaBuildFactory(
                     extra_configure_args=[
                         "-DLLVM_TARGETS_TO_BUILD=AArch64",
                         "-DFLANG_BUILD_NEW_DRIVER=ON",
                         "-DLLVM_ENABLE_ASSERTIONS=ON",
                         "-DCMAKE_BUILD_TYPE=Release",
                         "-DCMAKE_CXX_STANDARD=17",
                     ])},
 
+    {'name' : "flang-aarch64-latest-gcc",
+    'tags'  : ['flang', 'aarch64', 'release'],
+    'workernames' : ["linaro-aarch64-flang-latest-gcc"],
+    'builddir': "flang-aarch64-latest-gcc",
+    'factory' : UnifiedTreeBuilder.getCmakeWithNinjaBuildFactory(
+                    clean=True,
+                    checks=['check-flang'],
+                    depends_on_projects=['llvm','mlir','clang','flang'],
+                    extra_configure_args=[
+                        "-DLLVM_TARGETS_TO_BUILD=AArch64",
+                        "-DCMAKE_C_COMPILER=/usr/bin/gcc",
+                        "-DCMAKE_CXX_COMPILER=/usr/bin/g++",
+                        "-DLLVM_INSTALL_UTILS=ON",
+                        "-DCMAKE_CXX_STANDARD=17",
+                        "-DLLVM_ENABLE_WERROR=OFF",
+                        "-DFLANG_ENABLE_WERROR=ON",
+                        "-DBUILD_SHARED_LIBS=ON",
+                        "-DLLVM_ENABLE_ASSERTIONS=ON",
+                        "-DFLANG_BUILD_NEW_DRIVER=ON",
+                        "-DCMAKE_BUILD_TYPE=Release",
+                    ])},
+
     {'name' : "flang-x86_64-linux",
     'tags'  : ["flang"],
     'workernames' : ["nersc-flang"],
     'builddir': "flang-x86_64-linux",
     'factory' : UnifiedTreeBuilder.getCmakeWithNinjaBuildFactory(
                     depends_on_projects=['llvm','mlir','clang','flang'],
                     extra_configure_args=[
                         "-DLLVM_TARGETS_TO_BUILD=X86",

buildbot/osuosl/master/config/workers.py

return [
         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-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),
         create_worker("linaro-aarch64-lldb", properties={'jobs': 16}, max_builds=1),
 
         # AArch64
         create_worker("linaro-armv8-windows-msvc-01", properties={'jobs' : 8}, max_builds=1),
         create_worker("linaro-armv8-windows-msvc-02", properties={'jobs' : 8}, max_builds=1),