[zorg] Add flang to clang-cmake-aarch64-full

[rovka]

Summary

This requires some minor changes in ClangBuilder.py, to make it possible
to enable flang along all the other projects. Enabling flang will also
pull in MLIR.

[yroux]

LGTM

buildbot/osuosl/master/config/builders.py

return [
                       extra_cmake_args=["-DCMAKE_C_FLAGS='-mcpu=cortex-a57'",
                                         "-DCMAKE_CXX_FLAGS='-mcpu=cortex-a57'",
                                         "-DLLVM_TARGETS_TO_BUILD='ARM;AArch64'",
                                         "-DCOMPILER_RT_BUILD_SANITIZERS=OFF",
                                         "-DLLVM_ENABLE_LLD=True"],
                ),
          'category'   : 'lld'},
 
-        # AArch64 Clang+LLVM+RT check-all + test-suite + self-hosting
+        # AArch64 Clang+LLVM+RT check-all + flang + test-suite + self-hosting
         {'name': "clang-cmake-aarch64-full",
          'slavenames':["linaro-aarch64-full"],
          'builddir':"clang-cmake-aarch64-full",
          'factory' : ClangBuilder.getClangCMakeBuildFactory(
                       clean=False,
                       checkout_compiler_rt=True,
+                      checkout_flang=True,
                       checkout_lld=False,
                       test=True,
                       useTwoStage=True,
                       testStage1=False,
                       runTestSuite=True,
                       testsuite_flags=['--cppflags', '-mcpu=cortex-a57',
                                        '--threads=32', '--build-threads=32'],
                       extra_cmake_args=["-DCMAKE_C_FLAGS='-mcpu=cortex-a57'",

zorg/buildbot/builders/ClangBuilder.py

def getClangCMakeBuildFactory(
             env=None,
             extra_cmake_args=None,
 
             # Extra repositories
             checkout_clang_tools_extra=True,
             checkout_compiler_rt=True,
             checkout_lld=True,
             checkout_libcxx=False,
+            checkout_flang=False,
             checkout_test_suite=False):
     return _getClangCMakeBuildFactory(
                clean=clean, test=test, cmake=cmake, jobs=jobs, vs=vs,
                vs_target_arch=vs_target_arch, useTwoStage=useTwoStage,
                testStage1=testStage1, stage1_config=stage1_config,
                stage2_config=stage2_config, runTestSuite=runTestSuite,
                nt_flags=nt_flags, testsuite_flags=testsuite_flags,
                submitURL=submitURL, testerName=testerName,
                env=env, extra_cmake_args=extra_cmake_args,
                checkout_clang_tools_extra=checkout_clang_tools_extra,
                checkout_lld=checkout_lld,
                checkout_compiler_rt=checkout_compiler_rt,
                checkout_libcxx=checkout_libcxx,
+               checkout_flang=checkout_flang,
                checkout_test_suite=checkout_test_suite)
 
 def _getClangCMakeBuildFactory(
             clean=True,
             test=True,
             cmake='cmake',
             jobs=None,
 
def _getClangCMakeBuildFactory(
             extra_cmake_args=None,
 
             # Extra repositories
             checkout_clang_tools_extra=True,
             checkout_compiler_rt=True,
             checkout_lld=True,
             checkout_libcxx=False,
             checkout_test_suite=False,
+            checkout_flang=False,
 
             # Upload artifacts to Google Cloud Storage (for the llvmbisect tool)
             stage1_upload_directory=None,
 
             # Use a lower compression level to generate the build-cache package faster
             # default is 6 according to documentation
             xz_compression_factor=6,
             use_pixz_compression=False,
def _getClangCMakeBuildFactory(
     if checkout_compiler_rt:
         depends_on_projects.append('compiler-rt')
     if checkout_lld:
         depends_on_projects.append('lld')
     if checkout_libcxx:
         depends_on_projects.append('libcxx')
         depends_on_projects.append('libcxxabi')
         depends_on_projects.append('libunwind')
+    if checkout_flang:
+        depends_on_projects.append('flang')
+        depends_on_projects.append('mlir')
 
     f = LLVMBuildFactory(
             depends_on_projects=depends_on_projects,
             llvm_srcdir='llvm')
 
     # Checkout the latest code for LNT
     # and the test-suite separately. Le's do this first,
     # so we wouldn't poison got_revision property.