zorg/buildbot/builders/ClangBuilder.py

import buildbot
import buildbot.process.factory
import copy
import os

from buildbot.process.properties import WithProperties, Property
from buildbot.steps.shell import Configure, ShellCommand, SetProperty
from buildbot.steps.shell import WarningCountingShellCommand
from buildbot.steps.source import SVN
from buildbot.steps.transfer import FileDownload

import zorg.buildbot.util.artifacts as artifacts
import zorg.buildbot.builders.Util as builders_util
import zorg.buildbot.util.phasedbuilderutils as phasedbuilderutils
import zorg.buildbot.commands as commands
import zorg.buildbot.commands.BatchFileDownload as batch_file_download
import zorg.buildbot.commands.LitTestCommand as lit_test_command

def getClangBuildFactory(
            triple=None,
            clean=True,
            test=True,
            package_dst=None,
            run_cxx_tests=False,
            examples=False,
            valgrind=False,
            valgrindLeakCheck=False,
            useTwoStage=False,
            completely_clean=False, 
            make='make',
            jobs="%(jobs)s",
            stage1_config='Debug+Asserts',
            stage2_config='Release+Asserts',
            env={}, # Environmental variables for all steps.
            extra_configure_args=[],
            use_pty_in_tests=False,
            trunk_revision=None,
            force_checkout=False,
            extra_clean_step=None,
            checkout_compiler_rt=False,
            run_gdb=False,
            run_modern_gdb=False,
            run_gcc=False,
            merge_functions=False,
            cmake=None,
            modules=False):
    assert not modules or (cmake and useTwoStage), \
           "modules build requires 2 stage cmake build for now"

    # Prepare environmental variables. Set here all env we want everywhere.
    merged_env = {
        'TERM' : 'dumb' # Make sure Clang doesn't use color escape sequences.
                 }
    if env is not None:
        # Overwrite pre-set items with the given ones, so user can set anything.
        merged_env.update(env)

    llvm_srcdir = "llvm.src"
    llvm_1_objdir = "llvm.obj"
    llvm_1_installdir = "llvm.install.1"
    llvm_2_objdir = "llvm.obj.2"
    llvm_2_installdir = "llvm.install"

    f = buildbot.process.factory.BuildFactory()

    # Determine the build directory.
    f.addStep(buildbot.steps.shell.SetProperty(name="get_builddir",
                                               command=["pwd"],
                                               property="builddir",
                                               description="set build dir",
                                               workdir=".",
                                               env=merged_env))

    # Blow away completely, if requested.
    if completely_clean:
        f.addStep(ShellCommand(name="rm-llvm.src",
                               command=["rm", "-rf", llvm_srcdir],
                               haltOnFailure=True,
                               description=["rm src dir", "llvm"],
                               workdir=".",
                               env=merged_env))

    # Checkout sources.
    if trunk_revision:
        # The SVN build step provides no mechanism to check out a specific revision
        # based on a property, so just run the commands directly here.
        svn_co = ['svn', 'checkout']
        if force_checkout:
            svn_co += ['--force']
        svn_co += ['--revision', WithProperties(trunk_revision)]

        svn_co_llvm = svn_co + \
          [WithProperties('http://llvm.org/svn/llvm-project/llvm/trunk@%s' %
                          trunk_revision),
           llvm_srcdir]
        svn_co_clang = svn_co + \
          [WithProperties('http://llvm.org/svn/llvm-project/cfe/trunk@%s' %
                          trunk_revision),
           '%s/tools/clang' % llvm_srcdir]
        svn_co_clang_tools_extra = svn_co + \
          [WithProperties('http://llvm.org/svn/llvm-project/clang-tools-extra/trunk@%s' %
                          trunk_revision),
           '%s/tools/clang/tools/extra' % llvm_srcdir]

        f.addStep(ShellCommand(name='svn-llvm',
                               command=svn_co_llvm,
                               haltOnFailure=True,
                               workdir='.'))
        f.addStep(ShellCommand(name='svn-clang',
                               command=svn_co_clang,
                               haltOnFailure=True,
                               workdir='.'))
        f.addStep(ShellCommand(name='svn-clang-tools-extra',
                               command=svn_co_clang_tools_extra,
                               haltOnFailure=True,
                               workdir='.'))
    else:
        f.addStep(SVN(name='svn-llvm',
                      mode='update',
                      baseURL='http://llvm.org/svn/llvm-project/llvm/',
                      defaultBranch='trunk',
                      workdir=llvm_srcdir))
        f.addStep(SVN(name='svn-clang',
                      mode='update',
                      baseURL='http://llvm.org/svn/llvm-project/cfe/',
                      defaultBranch='trunk',
                      workdir='%s/tools/clang' % llvm_srcdir))
        f.addStep(SVN(name='svn-clang-tools-extra',
                      mode='update',
                      baseURL='http://llvm.org/svn/llvm-project/clang-tools-extra/',
                      defaultBranch='trunk',
                      workdir='%s/tools/clang/tools/extra' % llvm_srcdir))
        if checkout_compiler_rt:
            f.addStep(SVN(name='svn-compiler-rt',
                          mode='update',
                          baseURL='http://llvm.org/svn/llvm-project/compiler-rt/',
                          defaultBranch='trunk',
                          workdir='%s/projects/compiler-rt' % llvm_srcdir))

    # Revert and apply patch mergeFunctions in required
    if merge_functions:
        f.addStep(ShellCommand(name="revert_patch_MergeFunctions",
                               command=["svn", "-R", "revert", '.'],
                               haltOnFailure=True,
                               description=["revert patch MergeFunctions"],
                               workdir='%s/tools/clang' % llvm_srcdir,
                               env=merged_env))

    if merge_functions:
        f.addStep(ShellCommand(name="patch_MergeFunctions",
                               command=["patch", "-Np0", "-i", '../../utils/Misc/mergefunctions.clang.svn.patch'],
                               haltOnFailure=True,
                               description=["patch MergeFunctions"],
                               workdir='%s/tools/clang' % llvm_srcdir,
                               env=merged_env))

    # Clean up llvm (stage 1); unless in-dir.
    if clean and llvm_srcdir != llvm_1_objdir:
        f.addStep(ShellCommand(name="rm-llvm.obj.stage1",
                               command=["rm", "-rf", llvm_1_objdir],
                               haltOnFailure=True,
                               description=["rm build dir", "llvm"],
                               workdir=".",
                               env=merged_env))

    if not clean:
        if cmake:
            expected_makefile = 'Makefile'
        else:
            expected_makefile = 'Makefile.config'
        f.addStep(SetProperty(name="Makefile_isready",
                              workdir=llvm_1_objdir,
                              command=["sh", "-c",
                                       "test -e %s && echo OK || echo Missing" % expected_makefile],
                              flunkOnFailure=False,
                          property="exists_Makefile"))

    if not cmake:
        # Force without llvm-gcc so we don't run afoul of Frontend test failures.
        base_configure_args = [WithProperties("%%(builddir)s/%s/configure" % llvm_srcdir),
                               '--disable-bindings']
        base_configure_args += extra_configure_args
        if triple:
            base_configure_args += ['--build=%s' % triple,
                                    '--host=%s' % triple]
        args = base_configure_args + [WithProperties("--prefix=%%(builddir)s/%s" % llvm_1_installdir)]
        args += builders_util.getConfigArgs(stage1_config)

        f.addStep(Configure(command=args,
                            workdir=llvm_1_objdir,
                            description=['configuring',stage1_config],
                            descriptionDone=['configure',stage1_config],
                            env=merged_env,
                            doStepIf=lambda step: step.build.getProperty("exists_Makefile") != "OK"))
    else:
        cmake_triple_arg = []
        if triple:
            cmake_triple_arg = ['-DLLVM_HOST_TRIPLE=%s' % triple]
        f.addStep(ShellCommand(name='cmake',
                               command=[cmake,
                                        '-DLLVM_BUILD_TESTS=ON',
                                        '-DCMAKE_BUILD_TYPE=%s' % stage1_config] +
                                       cmake_triple_arg +
                                       extra_configure_args +
                                       ["../" + llvm_srcdir],
                               description='cmake stage1',
                               workdir=llvm_1_objdir,
                               env=merged_env,
                               doStepIf=lambda step: step.build.getProperty("exists_Makefile") != "OK"))

    # Make clean if using in-dir builds.
    if clean and llvm_srcdir == llvm_1_objdir:
        f.addStep(WarningCountingShellCommand(name="clean-llvm",
                                              command=[make, "clean"],
                                              haltOnFailure=True,
                                              description="cleaning llvm",
                                              descriptionDone="clean llvm",
                                              workdir=llvm_1_objdir,
                                              doStepIf=clean,
                                              env=merged_env))

    if extra_clean_step:
        f.addStep(extra_clean_step)

    f.addStep(WarningCountingShellCommand(name="compile",
                                          command=['nice', '-n', '10',
                                                   make, WithProperties("-j%s" % jobs)],
                                          haltOnFailure=True,
                                          flunkOnFailure=not run_gdb,
                                          description=["compiling", stage1_config],
                                          descriptionDone=["compile", stage1_config],
                                          workdir=llvm_1_objdir,
                                          env=merged_env))

    if examples:
        f.addStep(WarningCountingShellCommand(name="compile.examples",
                                              command=['nice', '-n', '10',
                                                       make, WithProperties("-j%s" % jobs),
                                                       "BUILD_EXAMPLES=1"],
                                              haltOnFailure=True,
                                              description=["compiling", stage1_config, "examples"],
                                              descriptionDone=["compile", stage1_config, "examples"],
                                              workdir=llvm_1_objdir,
                                              env=merged_env))

    clangTestArgs = '-v -j %s' % jobs
    if valgrind:
        clangTestArgs += ' --vg'
        if valgrindLeakCheck:
            clangTestArgs += ' --vg-leak'
        clangTestArgs += ' --vg-arg --suppressions=%(builddir)s/llvm/tools/clang/utils/valgrind/x86_64-pc-linux-gnu_gcc-4.3.3.supp --vg-arg --suppressions=%(builddir)s/llvm/utils/valgrind/x86_64-pc-linux-gnu.supp'
    extraTestDirs = ''
    if run_cxx_tests:
        extraTestDirs += '%(builddir)s/llvm/tools/clang/utils/C++Tests'
    if test:
        f.addStep(lit_test_command.LitTestCommand(name='check-all',
                                   command=[make, "check-all", "VERBOSE=1",
                                            WithProperties("LIT_ARGS=%s" % clangTestArgs),
                                            WithProperties("EXTRA_TESTDIRS=%s" % extraTestDirs)],
                                   flunkOnFailure=not run_gdb,
                                   description=["checking"],
                                   descriptionDone=["checked"],
                                   workdir=llvm_1_objdir,
                                   usePTY=use_pty_in_tests,
                                   env=merged_env))

    # Install llvm and clang.
    if llvm_1_installdir and not cmake: # FIXME: install for cmake build
        f.addStep(ShellCommand(name="rm-install.clang.stage1",
                               command=["rm", "-rf", llvm_1_installdir],
                               haltOnFailure=True,
                               description=["rm install dir", "clang"],
                               workdir=".",
                               env=merged_env))
        f.addStep(WarningCountingShellCommand(name="install.clang.stage1",
                                              command = ['nice', '-n', '10',
                                                         make, 'install-clang'],
                                              haltOnFailure=True,
                                              description=["install", "clang",
                                                           stage1_config],
                                              workdir=llvm_1_objdir,
                                              env=merged_env))

    if run_gdb or run_gcc or run_modern_gdb:
        ignores = getClangTestsIgnoresFromPath(os.path.expanduser('~/public/clang-tests'), 'clang-x86_64-darwin10')
        install_prefix = "%%(builddir)s/%s" % llvm_1_installdir
        if run_gdb:
            addClangGDBTests(f, ignores, install_prefix)
        if run_modern_gdb:
            addModernClangGDBTests(f, jobs, install_prefix)
        if run_gcc:
            addClangGCCTests(f, ignores, install_prefix)

    if not useTwoStage:
        if package_dst:
            name = WithProperties(
                "%(builddir)s/" + llvm_1_objdir +
                "/clang-r%(got_revision)s-b%(buildnumber)s.tgz")
            f.addStep(ShellCommand(name='pkg.tar',
                                   description="tar root",
                                   command=["tar", "zcvf", name, "./"],
                                   workdir=llvm_1_installdir,
                                   warnOnFailure=True,
                                   flunkOnFailure=False,
                                   haltOnFailure=False,
                                   env=merged_env))
            f.addStep(ShellCommand(name='pkg.upload',
                                   description="upload root",
                                   command=["scp", name,
                                            WithProperties(
                            package_dst + "/%(buildername)s")],
                                   workdir=".",
                                   warnOnFailure=True,
                                   flunkOnFailure=False,
                                   haltOnFailure=False,
                                   env=merged_env))

        return f

    # Clean up llvm (stage 2).
    #
    # FIXME: It does not make much sense to skip this for a bootstrap builder.
    # Check whether there is any reason to skip cleaning here and if not, remove
    # this condition.
    if clean or cmake:
        f.addStep(ShellCommand(name="rm-llvm.obj.stage2",
                               command=["rm", "-rf", llvm_2_objdir],
                               haltOnFailure=True,
                               description=["rm build dir", "llvm", "(stage 2)"],
                               workdir=".",
                               env=merged_env))

    # Configure llvm (stage 2).
    if not cmake:
        args = base_configure_args + [WithProperties("--prefix=%(builddir)s/" + llvm_2_installdir)]
        args += builders_util.getConfigArgs(stage2_config)
        local_env = dict(merged_env)
        local_env.update({
            'CC'  : WithProperties("%%(builddir)s/%s/bin/clang"   % llvm_1_installdir),
            'CXX' : WithProperties("%%(builddir)s/%s/bin/clang++" % llvm_1_installdir)})

        f.addStep(Configure(name="configure.llvm.stage2",
                            command=args,
                            haltOnFailure=True,
                            workdir=llvm_2_objdir,
                            description=["configure", "llvm", "(stage 2)",
                                         stage2_config],
                            env=local_env))
    else:
        c_flags = ''
        cxx_flags = ''
        extra_args = []
        if modules:
            c_flags += '-fmodules-cache-path=%%(builddir)s/%s/module-cache' % llvm_2_objdir
            # Modules requires libc++ for now (we don't have a module map for libstdc++ yet).
            cxx_flags += '-stdlib=libc++'
            extra_args = ['-DLLVM_ENABLE_MODULES=1']

        f.addStep(ShellCommand(name='cmake',
                               command=[cmake] + extra_args + [
                                        '-DLLVM_BUILD_TESTS=ON',
                                        WithProperties('-DCMAKE_C_COMPILER=%%(builddir)s/%s/bin/clang' % llvm_1_objdir), # FIXME use installdir
                                        WithProperties('-DCMAKE_CXX_COMPILER=%%(builddir)s/%s/bin/clang++' % llvm_1_objdir),
                                        '-DCMAKE_BUILD_TYPE=%s' % stage2_config,
                                        WithProperties('-DCMAKE_C_FLAGS=%s' % c_flags),
                                        WithProperties('-DCMAKE_CXX_FLAGS=%s %s' % (c_flags, cxx_flags)),
                                        "../" + llvm_srcdir],
                               description='cmake stage2',
                               workdir=llvm_2_objdir,
                               env=merged_env))

    if modules:
        f.addStep(WarningCountingShellCommand(name="compile.llvm.stage2.intrinsics_gen",
                                              command=['nice', '-n', '10',
                                                       make, "intrinsics_gen", WithProperties("-j%s" % jobs)],
                                              haltOnFailure=True,
                                              description=["compiling", "(stage 2 intrinsics.gen)",
                                                           stage2_config],
                                              descriptionDone=["compile", "(stage 2 intrinsics.gen)",
                                                               stage2_config],
                                              workdir=llvm_2_objdir,
                                              env=merged_env))

    # Build llvm (stage 2).
    f.addStep(WarningCountingShellCommand(name="compile.llvm.stage2",
                                          command=['nice', '-n', '10',
                                                   make, WithProperties("-j%s" % jobs)],
                                          haltOnFailure=True,
                                          description=["compiling", "(stage 2)",
                                                       stage2_config],
                                          descriptionDone=["compile", "(stage 2)",
                                                           stage2_config],
                                          workdir=llvm_2_objdir,
                                          env=merged_env))

    if test:
        f.addStep(lit_test_command.LitTestCommand(name='check-all',
                                   command=[make, "check-all", "VERBOSE=1",
                                            WithProperties("LIT_ARGS=%s" % clangTestArgs),
                                            WithProperties("EXTRA_TESTDIRS=%s" % extraTestDirs)],
                                   description=["checking"],
                                   descriptionDone=["checked"],
                                   workdir=llvm_2_objdir,
                                   usePTY=use_pty_in_tests,
                                   env=merged_env))

    if llvm_2_installdir and not cmake: # FIXME: install for cmake build
        # Install clang (stage 2).
        f.addStep(ShellCommand(name="rm-install.clang.stage2",
                               command=["rm", "-rf", llvm_2_installdir],
                               haltOnFailure=True,
                               description=["rm install dir", "clang"],
                               workdir=".",
                               env=merged_env))
        f.addStep(WarningCountingShellCommand(name="install.clang.stage2",
                                              command = ['nice', '-n', '10',
                                                         make, 'install-clang'],
                                              haltOnFailure=True,
                                              description=["install", "clang",
                                                           "(stage 2)"],
                                              workdir=llvm_2_objdir,
                                              env=merged_env))

    if package_dst:
        name = WithProperties(
            "%(builddir)s/" + llvm_2_objdir +
            "/clang-r%(got_revision)s-b%(buildnumber)s.tgz")
        f.addStep(ShellCommand(name='pkg.tar',
                               description="tar root",
                               command=["tar", "zcvf", name, "./"],
                               workdir=llvm_2_installdir,
                               warnOnFailure=True,
                               flunkOnFailure=False,
                               haltOnFailure=False,
                               env=merged_env))
        f.addStep(ShellCommand(name='pkg.upload',
                               description="upload root",
                               command=["scp", name,
                                        WithProperties(
                        package_dst + "/%(buildername)s")],
                               workdir=".",
                               warnOnFailure=True,
                               flunkOnFailure=False,
                               haltOnFailure=False,
                               env=merged_env))

    return f

def addSVNUpdateSteps(f,
                      checkout_clang_tools_extra,
                      checkout_compiler_rt,
                      checkout_test_suite):
    # We *must* checkout at least Clang+LLVM
    f.addStep(SVN(name='svn-llvm',
                  mode='update', baseURL='http://llvm.org/svn/llvm-project/llvm/',
                  defaultBranch='trunk',
                  workdir='llvm'))
    f.addStep(SVN(name='svn-clang',
                  mode='update', baseURL='http://llvm.org/svn/llvm-project/cfe/',
                  defaultBranch='trunk',
                  workdir='llvm/tools/clang'))

    # Extra stuff that will be built/tested
    if checkout_clang_tools_extra:
        f.addStep(SVN(name='svn-clang-tools-extra',
                      mode='update', baseURL='http://llvm.org/svn/llvm-project/clang-tools-extra/',
                      defaultBranch='trunk',
                      workdir='llvm/tools/clang/tools/extra'))
    if checkout_compiler_rt:
        f.addStep(SVN(name='svn-compiler-rt',
                      mode='update', baseURL='http://llvm.org/svn/llvm-project/compiler-rt/',
                      defaultBranch='trunk',
                      workdir='llvm/projects/compiler-rt'))
    if checkout_test_suite:
        f.addStep(SVN(name='svn-lnt',
                      mode='update', baseURL='http://llvm.org/svn/llvm-project/lnt/',
                      defaultBranch='trunk',
                      workdir='test/lnt'))
        f.addStep(SVN(name='svn-test-suite',
                      mode='update', baseURL='http://llvm.org/svn/llvm-project/test-suite/',
                      defaultBranch='trunk',
                      workdir='test/test-suite'))


def getClangCMakeBuildFactory(
            clean=True,
            test=True,
            cmake='cmake',
            jobs=None,

            # VS tools environment variable if using MSVC. For example,
            # %VS120COMNTOOLS% selects the 2013 toolchain.
            vs=None,
            vs_target_arch='x86',

            # Multi-stage compilation
            useTwoStage=False,
            testStage1=True,
            stage1_config='Release',
            stage2_config='Release',

            # Test-suite
            runTestSuite=False,
            nt_flags=[],
            submitURL=None,
            testerName=None,

            # Environmental variables for all steps.
            env={},
            extra_cmake_args=[],

            # Extra repositories
            checkout_clang_tools_extra=True,
            checkout_compiler_rt=True):

    ############# PREPARING
    f = buildbot.process.factory.BuildFactory()

    addSVNUpdateSteps(f,
                      checkout_clang_tools_extra=checkout_clang_tools_extra,
                      checkout_compiler_rt=checkout_compiler_rt,
                      checkout_test_suite=runTestSuite)

    # If jobs not defined, Ninja will choose a suitable value
    jobs_cmd = []
    lit_args = "'-v"
    if jobs is not None:
        jobs_cmd = ["-j"+str(jobs)]
        lit_args += " -j"+str(jobs)+"'"
    else:
        lit_args += "'"
    ninja_cmd = ['ninja'] + jobs_cmd
    ninja_install_cmd = ['ninja', 'install'] + jobs_cmd
    ninja_check_cmd = ['ninja', 'check-all'] + jobs_cmd
    check_build_cmd = ["sh", "-c",
                       "test -e build.ninja && echo OK || echo Missing"]
    if vs:
        check_build_cmd = ["cmd", "/c", "if exist build.ninja (echo OK) " +
                           " else (echo Missing & exit 1)"]

    # Global configurations
    stage1_build = 'stage1'
    stage1_install = 'stage1.install'
    stage2_build = 'stage2'
    stage2_install = 'stage2.install'

    # Set up VS environment, if appropriate.
    if vs:
        f.addStep(SetProperty(
            command=builders_util.getVisualStudioEnvironment(vs, vs_target_arch),
            extract_fn=builders_util.extractSlaveEnvironment))
        assert not env, "Can't have custom builder env vars with VS"
        env = Property('slave_env')


    ############# CLEANING
    if clean:
        f.addStep(ShellCommand(name='clean stage 1',
                               command=['rm','-rf',stage1_build],
                               warnOnFailure=True,
                               description='cleaning stage 1',
                               descriptionDone='clean',
                               workdir='.',
                               env=env))
    else:
        f.addStep(SetProperty(name="check ninja files 1",
                              workdir=stage1_build,
                              command=check_build_cmd,
                              flunkOnFailure=False,
                              property="exists_ninja_1"))


    ############# STAGE 1
    f.addStep(ShellCommand(name='cmake stage 1',
                           command=[cmake, "-G", "Ninja", "../llvm",
                                    "-DCMAKE_BUILD_TYPE="+stage1_config,
                                    "-DLLVM_ENABLE_ASSERTIONS=True",
                                    "-DLLVM_LIT_ARGS="+lit_args,
                                    "-DCMAKE_INSTALL_PREFIX=../"+stage1_install]
                                    + extra_cmake_args,
                           haltOnFailure=True,
                           description='cmake stage 1',
                           workdir=stage1_build,
                           doStepIf=lambda step: step.build.getProperty("exists_ninja_1") != "OK",
                           env=env))

    f.addStep(WarningCountingShellCommand(name='build stage 1',
                                          command=ninja_cmd,
                                          haltOnFailure=True,
                                          description='ninja all',
                                          workdir=stage1_build,
                                          env=env))

    if test and testStage1:
        f.addStep(lit_test_command.LitTestCommand(name='ninja check 1',
                                   command=ninja_check_cmd,
                                   haltOnFailure=not runTestSuite,
                                   description=["checking stage 1"],
                                   descriptionDone=["stage 1 checked"],
                                   workdir=stage1_build,
                                   env=env))

    if useTwoStage or runTestSuite:
        f.addStep(ShellCommand(name='install stage 1',
                               command=ninja_install_cmd,
                               description='ninja install',
                               workdir=stage1_build,
                               env=env))

    # Compute the cmake define flag to set the C and C++ compiler to clang. Use
    # clang-cl if we used MSVC for stage1.
    if not vs:
        cc = 'clang'
        cxx = 'clang++'
    else:
        cc = 'clang-cl.exe'
        cxx = 'clang-cl.exe'


    ############# STAGE 2
    if useTwoStage:
        if clean:
            f.addStep(ShellCommand(name='clean stage 2',
                                   command=['rm','-rf',stage2_build],
                                   warnOnFailure=True,
                                   description='cleaning stage 2',
                                   descriptionDone='clean',
                                   workdir='.',
                                   env=env))
        else:
            f.addStep(SetProperty(name="check ninja files 2",
                                  workdir=stage2_build,
                                  command=check_build_cmd,
                                  flunkOnFailure=False,
                                  property="exists_ninja_2"))

        # Set the compiler using the CC and CXX environment variables to work around
        # backslash string escaping bugs somewhere between buildbot and cmake. The
        # env.exe helper is required to run the tests, so hopefully it's already on
        # PATH.
        cmake_cmd2 = ['env',
                      WithProperties('CC=%(workdir)s/'+stage1_install+'/bin/'+cc),
                      WithProperties('CXX=%(workdir)s/'+stage1_install+'/bin/'+cxx),
                      cmake, "-G", "Ninja", "../llvm",
                      "-DCMAKE_BUILD_TYPE="+stage2_config,
                      "-DLLVM_ENABLE_ASSERTIONS=True",
                      "-DLLVM_LIT_ARGS="+lit_args,
                      "-DCMAKE_INSTALL_PREFIX=../"+stage2_install] + extra_cmake_args

        f.addStep(ShellCommand(name='cmake stage 2',
                               command=cmake_cmd2,
                               haltOnFailure=True,
                               description='cmake stage 2',
                               workdir=stage2_build,
                               doStepIf=lambda step: step.build.getProperty("exists_ninja_2") != "OK",
                               env=env))

        f.addStep(WarningCountingShellCommand(name='build stage 2',
                                              command=ninja_cmd,
                                              haltOnFailure=True,
                                              description='ninja all',
                                              workdir=stage2_build,
                                              env=env))

        if test:
            f.addStep(lit_test_command.LitTestCommand(name='ninja check 2',
                                       command=ninja_check_cmd,
                                       haltOnFailure=not runTestSuite,
                                       description=["checking stage 2"],
                                       descriptionDone=["stage 2 checked"],
                                       workdir=stage2_build,
                                       env=env))

    ############# TEST SUITE
    ## Test-Suite (stage 2 if built, stage 1 otherwise)
    if runTestSuite:
        compiler_path = stage1_install
        if useTwoStage:
            compiler_path=stage2_install
            f.addStep(ShellCommand(name='install stage 2',
                                   command=ninja_install_cmd,
                                   description='ninja install 2',
                                   workdir=stage2_build,
                                   env=env))

        # Get generated python, lnt
        python = WithProperties('%(workdir)s/test/sandbox/bin/python')
        lnt = WithProperties('%(workdir)s/test/sandbox/bin/lnt')
        lnt_setup = WithProperties('%(workdir)s/test/lnt/setup.py')

        # Paths
        sandbox = WithProperties('%(workdir)s/test/sandbox')
        test_suite_dir = WithProperties('%(workdir)s/test/test-suite')

        # Get latest built Clang (stage1 or stage2)
        cc = WithProperties('%(workdir)s/'+compiler_path+'/bin/'+cc)
        cxx = WithProperties('%(workdir)s/'+compiler_path+'/bin/'+cxx)

        # LNT Command line
        if jobs is None:
            jobs = 1
        test_suite_cmd = [python, lnt, 'runtest', 'nt',
                          '-j'+str(jobs),
                          '--no-timestamp',
                          '--sandbox', sandbox,
                          '--test-suite', test_suite_dir,
                          '--cc', cc,
                          '--cxx', cxx]
        # Append any option provided by the user
        test_suite_cmd.extend(nt_flags)
        # Only submit if a URL has been specified
        if submitURL is not None:
            if not isinstance(submitURL, list):
                submitURL = [submitURL]
            for url in submitURL:
                test_suite_cmd.extend(['--submit', url])
            if testerName:
                test_suite_cmd.extend(['--no-machdep-info', testerName])
        # CC and CXX are needed as env for build-tools
        test_suite_env = copy.deepcopy(env)
        test_suite_env['CC'] = cc
        test_suite_env['CXX'] = cxx

        # Steps to prepare, build and run LNT
        f.addStep(ShellCommand(name='clean sandbox',
                               command=['rm', '-rf', 'sandbox'],
                               haltOnFailure=True,
                               description='removing sandbox directory',
                               workdir='test',
                               env=env))
        f.addStep(ShellCommand(name='recreate sandbox',
                               command=['virtualenv', 'sandbox'],
                               haltOnFailure=True,
                               description='recreating sandbox',
                               workdir='test',
                               env=env))
        f.addStep(ShellCommand(name='setup lit',
                               command=[python, lnt_setup, 'develop'],
                               haltOnFailure=True,
                               description='setting up LNT in sandbox',
                               workdir='test/sandbox',
                               env=env))
        f.addStep(commands.LitTestCommand.LitTestCommand(
                               name='test-suite',
                               command=test_suite_cmd,
                               haltOnFailure=True,
                               description=['running the test suite'],
                               workdir='test/sandbox',
                               logfiles={'configure.log'   : 'build/configure.log',
                                         'build-tools.log' : 'build/build-tools.log',
                                         'test.log'        : 'build/test.log',
                                         'report.json'     : 'build/report.json'},
                               env=test_suite_env))

    return f

def getClangMSVCBuildFactory(update=True, clean=True, vcDrive='c', jobs=1, cmake=r"cmake"):
    f = buildbot.process.factory.BuildFactory()

    if update:
        f.addStep(SVN(name='svn-llvm',
                      mode='update', baseURL='http://llvm.org/svn/llvm-project/llvm/',
                      defaultBranch='trunk',
                      workdir='llvm'))
        f.addStep(SVN(name='svn-clang',
                      mode='update', baseURL='http://llvm.org/svn/llvm-project/cfe/',
                      defaultBranch='trunk',
                      workdir='llvm/tools/clang'))
        f.addStep(SVN(name='svn-clang-tools-extra',
                      mode='update', baseURL='http://llvm.org/svn/llvm-project/clang-tools-extra/',
                      defaultBranch='trunk',
                      workdir='llvm/tools/clang/tools/extra'))

    # Full & fast clean.
    if clean:
        f.addStep(ShellCommand(name='clean-1',
                               command=['del','/s/q','build'],
                               warnOnFailure=True,
                               description='cleaning',
                               descriptionDone='clean',
                               workdir='llvm'))
        f.addStep(ShellCommand(name='clean-2',
                               command=['rmdir','/s/q','build'],
                               warnOnFailure=True,
                               description='cleaning',
                               descriptionDone='clean',
                               workdir='llvm'))

    # Create the project files.

    # Use batch files instead of ShellCommand directly, Windows quoting is
    # borked. FIXME: See buildbot ticket #595 and buildbot ticket #377.
    f.addStep(batch_file_download.BatchFileDownload(name='cmakegen',
                                command=[cmake,
                                         "-DLLVM_TARGETS_TO_BUILD:=X86",
                                         "-DLLVM_INCLUDE_EXAMPLES:=OFF",
                                         "-DLLVM_INCLUDE_TESTS:=OFF",
                                         "-DLLVM_TARGETS_TO_BUILD:=X86",
                                         "-G",
                                         "Visual Studio 9 2008",
                                         ".."],
                                workdir="llvm\\build"))
    f.addStep(ShellCommand(name='cmake',
                           command=['cmakegen.bat'],
                           haltOnFailure=True,
                           description='cmake gen',
                           workdir='llvm\\build'))

    # Build it.
    f.addStep(batch_file_download.BatchFileDownload(name='vcbuild',
                                command=[vcDrive + r""":\Program Files\Microsoft Visual Studio 9.0\VC\VCPackages\vcbuild.exe""",
                                         "/M%d" % jobs,
                                         "LLVM.sln",
                                         "Debug|Win32"],
                                workdir="llvm\\build"))
    f.addStep(WarningCountingShellCommand(name='vcbuild',
                                          command=['vcbuild.bat'],
                                          haltOnFailure=True,
                                          description='vcbuild',
                                          workdir='llvm\\build',
                                          warningPattern=" warning C.*:"))

    # Build clang-test project.
    f.addStep(batch_file_download.BatchFileDownload(name='vcbuild_test',
                                command=[vcDrive + r""":\Program Files\Microsoft Visual Studio 9.0\VC\VCPackages\vcbuild.exe""",
                                         "clang-test.vcproj",
                                         "Debug|Win32"],
                                workdir="llvm\\build\\tools\\clang\\test"))
    f.addStep(lit_test_command.LitTestCommand(name='test-clang',
                               command=["vcbuild_test.bat"],
                               workdir="llvm\\build\\tools\\clang\\test"))

    return f

# Builds on Windows using CMake, MinGW(32|64), and no Microsoft tools.
def getClangMinGWBuildFactory(update=True, clean=True, jobs=6, cmake=r"cmake"):
    f = buildbot.process.factory.BuildFactory()

    if update:
        f.addStep(SVN(name='svn-llvm',
                      mode='update', baseURL='http://llvm.org/svn/llvm-project/llvm/',
                      defaultBranch='trunk',
                      workdir='llvm'))
        f.addStep(SVN(name='svn-clang',
                      mode='update', baseURL='http://llvm.org/svn/llvm-project/cfe/',
                      defaultBranch='trunk',
                      workdir='llvm/tools/clang'))
        f.addStep(SVN(name='svn-clang-tools-extra',
                      mode='update', baseURL='http://llvm.org/svn/llvm-project/clang-tools-extra/',
                      defaultBranch='trunk',
                      workdir='llvm/tools/clang/tools/extra'))

    # Full & fast clean.
    if clean:
        # note: This command is redundant as the next command removes everything
        f.addStep(ShellCommand(name='clean-1',
                               command=['del','/s/q','build'],
                               warnOnFailure=True,
                               description='cleaning',
                               descriptionDone='clean',
                               workdir='llvm'))
        f.addStep(ShellCommand(name='clean-2',
                               command=['rmdir','/s/q','build'],
                               warnOnFailure=True,
                               description='cleaning',
                               descriptionDone='clean',
                               workdir='llvm'))

    # Create the Makefiles.

    # Use batch files instead of ShellCommand directly, Windows quoting is
    # borked. FIXME: See buildbot ticket #595 and buildbot ticket #377.
    f.addStep(batch_file_download.BatchFileDownload(name='cmakegen',
                                command=[cmake,
                                         "-DLLVM_TARGETS_TO_BUILD:=X86",
                                         "-DLLVM_INCLUDE_EXAMPLES:=OFF",
                                         "-DLLVM_INCLUDE_TESTS:=OFF",
                                         "-DLLVM_TARGETS_TO_BUILD:=X86",
                                         "-G",
                                         "Ninja",
                                         ".."],
                                workdir="llvm\\build"))
    f.addStep(ShellCommand(name='cmake',
                           command=['cmakegen.bat'],
                           haltOnFailure=True,
                           description='cmake gen',
                           workdir='llvm\\build'))

    # Build it.
    f.addStep(batch_file_download.BatchFileDownload(name='makeall',
                                command=["ninja", "-j", "%d" % jobs],
                                haltOnFailure=True,
                                workdir='llvm\\build'))

    f.addStep(WarningCountingShellCommand(name='makeall',
                                          command=['makeall.bat'],
                                          haltOnFailure=True,
                                          description='makeall',
                                          workdir='llvm\\build'))

    # Build global check project (make check) (sources not checked out...).
    if 0:
        f.addStep(batch_file_download.BatchFileDownload(name='makecheck',
                                    command=["ninja", "check"],
                                    workdir='llvm\\build'))
        f.addStep(WarningCountingShellCommand(name='check',
                                              command=['makecheck.bat'],
                                              description='make check',
                                              workdir='llvm\\build'))

    # Build clang-test project (make clang-test).
    f.addStep(batch_file_download.BatchFileDownload(name='maketest',
                                                    command=["ninja", "clang-test"],
                                                    workdir="llvm\\build"))
    f.addStep(lit_test_command.LitTestCommand(name='clang-test',
                                              command=["maketest.bat"],
                                              workdir="llvm\\build"))
    return f

def addClangGCCTests(f, ignores={}, install_prefix="%(builddir)s/llvm.install",
                     languages = ('gcc', 'g++', 'objc', 'obj-c++')):
    make_vars = [WithProperties(
            'CC_UNDER_TEST=%s/bin/clang' % install_prefix),
                 WithProperties(
            'CXX_UNDER_TEST=%s/bin/clang++' % install_prefix)]
    f.addStep(SVN(name='svn-clang-gcc-tests', mode='update',
                  baseURL='http://llvm.org/svn/llvm-project/clang-tests/',
                  defaultBranch='trunk', workdir='clang-tests'))
    gcc_dg_ignores = ignores.get('gcc-4_2-testsuite', {})
    for lang in languages:
        f.addStep(commands.SuppressionDejaGNUCommand.SuppressionDejaGNUCommand(
            name='test-gcc-4_2-testsuite-%s' % lang,
            command=["make", "-k", "check-%s" % lang] + make_vars,
            description="gcc-4_2-testsuite (%s)" % lang,
            workdir='clang-tests/gcc-4_2-testsuite',
            logfiles={ 'dg.sum' : 'obj/%s/%s.sum' % (lang, lang),
                       '%s.log' % lang : 'obj/%s/%s.log' % (lang, lang)},
            ignore=gcc_dg_ignores.get(lang, [])))

def addClangGDBTests(f, ignores={}, install_prefix="%(builddir)s/llvm.install"):
    make_vars = [WithProperties(
            'CC_UNDER_TEST=%s/bin/clang' % install_prefix),
                 WithProperties(
            'CXX_UNDER_TEST=%s/bin/clang++' % install_prefix)]
    f.addStep(SVN(name='svn-clang-gdb-tests', mode='update',
                  baseURL='http://llvm.org/svn/llvm-project/clang-tests/',
                  defaultBranch='trunk', workdir='clang-tests'))
    f.addStep(commands.SuppressionDejaGNUCommand.SuppressionDejaGNUCommand(
            name='test-gdb-1472-testsuite',
            command=["make", "-k", "check"] + make_vars,
            description="gdb-1472-testsuite",
            workdir='clang-tests/gdb-1472-testsuite',
            logfiles={ 'dg.sum' : 'obj/filtered.gdb.sum',
                       'gdb.log' : 'obj/gdb.log' }))

def addModernClangGDBTests(f, jobs, install_prefix):
    make_vars = [WithProperties('RUNTESTFLAGS=CC_FOR_TARGET=\'{0}/bin/clang\' '
                                'CXX_FOR_TARGET=\'{0}/bin/clang++\' '
                                'CFLAGS_FOR_TARGET=\'-w -fno-limit-debug-info\''
                                .format(install_prefix))]
    f.addStep(SVN(name='svn-clang-modern-gdb-tests', mode='update',
                  svnurl='http://llvm.org/svn/llvm-project/clang-tests-external/trunk/gdb/7.5',
                  workdir='clang-tests/src'))
    f.addStep(Configure(command='../src/configure',
                        workdir='clang-tests/build/'))
    f.addStep(WarningCountingShellCommand(name='gdb-75-build',
                                          command=['make', WithProperties('-j%s' % jobs)],
                                          haltOnFailure=True,
                                          workdir='clang-tests/build'))
    f.addStep(commands.DejaGNUCommand.DejaGNUCommand(
            name='gdb-75-check',
            command=['make', '-k', WithProperties('-j%s' % jobs), 'check'] + make_vars,
            workdir='clang-tests/build',
            logfiles={'dg.sum':'gdb/testsuite/gdb.sum', 
                      'gdb.log':'gdb/testsuite/gdb.log'}))



# FIXME: Deprecated.
addClangTests = addClangGCCTests

def getClangTestsIgnoresFromPath(path, key):
    def readList(path):
        if not os.path.exists(path):
            return []

        f = open(path)
        lines = [ln.strip() for ln in f]
        f.close()
        return lines

    ignores = {}

    gcc_dg_ignores = {}
    for lang in ('gcc', 'g++', 'objc', 'obj-c++'):
        lang_path = os.path.join(path, 'gcc-4_2-testsuite', 'expected_results',
                                 key, lang)
        gcc_dg_ignores[lang] = (
            readList(os.path.join(lang_path, 'FAIL.txt')) +
            readList(os.path.join(lang_path, 'UNRESOLVED.txt')) +
            readList(os.path.join(lang_path, 'XPASS.txt')))
    ignores['gcc-4_2-testsuite' ] = gcc_dg_ignores

    ignores_path = os.path.join(path, 'gdb-1472-testsuite', 'expected_results',
                                key)
    gdb_dg_ignores = (
        readList(os.path.join(ignores_path, 'FAIL.txt')) +
        readList(os.path.join(ignores_path, 'UNRESOLVED.txt')) +
        readList(os.path.join(ignores_path, 'XPASS.txt')))
    ignores['gdb-1472-testsuite' ] = gdb_dg_ignores

    return ignores

from zorg.buildbot.util.phasedbuilderutils import getBuildDir, setProperty
from zorg.buildbot.builders.Util import _did_last_build_fail
from buildbot.steps.source.svn import SVN as HostSVN

def phasedClang(config_options, is_bootstrap=True, use_lto=False,
                incremental=False):
    # Create an instance of the Builder.
    f = buildbot.process.factory.BuildFactory()
    # Determine the build directory.
    f = getBuildDir(f)
    # get rid of old archives from prior builds
    f.addStep(buildbot.steps.shell.ShellCommand(
            name='rm.archives', command=['sh', '-c', 'sudo rm -rfv *gz'],
            haltOnFailure=False, description=['rm archives'],
            workdir=WithProperties('%(builddir)s')))
    # Clean the build directory.
    clang_build_dir = 'clang-build'
    if incremental:
        f.addStep(buildbot.steps.shell.ShellCommand(
                name='rm.clang-build', command=['sudo', 'rm', '-rfv',
                                                clang_build_dir],
                haltOnFailure=False, description=['rm dir', clang_build_dir],
                workdir=WithProperties('%(builddir)s'),
                doStepIf=_did_last_build_fail))
    else:
        f.addStep(buildbot.steps.shell.ShellCommand(
                name='rm.clang-build', command=['sudo', 'rm', '-rfv',
                                                clang_build_dir],
                haltOnFailure=False, description=['rm dir', clang_build_dir],
                workdir=WithProperties('%(builddir)s')))
    
    # Cleanup the clang link, which buildbot's SVN always_purge does not know
    # (in 8.5 this changed to method='fresh')
    # how to remove correctly. If we don't do this, the LLVM update steps will
    # end up doing a clobber every time.
    #
    # FIXME: Should file a Trac for this, but I am lazy.
    f.addStep(buildbot.steps.shell.ShellCommand(
            name='rm.clang-sources-link',
            command=['sudo', 'rm', '-rfv', 'llvm/tools/clang'],
            haltOnFailure=False, description=['rm', 'clang sources link'],
            workdir=WithProperties('%(builddir)s')))
    f.addStep(buildbot.steps.shell.ShellCommand(
            name='rm.compiler-rt-sources-link',
            command=['sudo', 'rm', '-rfv', 'llvm/projects/compiler-rt'],
            haltOnFailure=False, description=['rm', 'compiler-rt sources link'],
            workdir=WithProperties('%(builddir)s')))
    # TODO: We used to use a symlink here but it seems to not work. I am trying
    # to get this builder to work so I am just going to copy it instead.
    f.addStep(buildbot.steps.shell.ShellCommand(
              name='rm.clang-tools-extra-source',
              command=['sudo', 'rm', '-rfv', 'clang.src/tools/extra'],
              haltOnFailure=True, workdir=WithProperties('%(builddir)s'),
              description=['rm', 'clang-tools-extra sources']))
    f.addStep(buildbot.steps.shell.ShellCommand(
              name='rm.debuginfo-tests',
              command=['sudo', 'rm', '-rfv', 'clang.src/test/debuginfo-tests'],
              haltOnFailure=True, workdir=WithProperties('%(builddir)s'),
              description=['rm', 'debuginfo-tests sources']))

    # Pull sources.
    f = phasedbuilderutils.SVNCleanupStep(f, 'llvm')
    f.addStep(HostSVN(name='pull.llvm', mode='incremental', method='fresh',
                      repourl='http://llvm.org/svn/llvm-project/llvm/trunk',
                      retry=(60, 5), workdir='llvm', description='pull.llvm',
                      alwaysUseLatest=False))
    f = phasedbuilderutils.SVNCleanupStep(f, 'clang.src')
    f.addStep(HostSVN(name='pull.clang', mode='incremental', method='fresh',
                      repourl='http://llvm.org/svn/llvm-project/cfe/trunk',
                      workdir='clang.src', retry=(60, 5),
                      description='pull.clang', alwaysUseLatest=False))
    f = phasedbuilderutils.SVNCleanupStep(f, 'clang-tools-extra.src')
    f.addStep(HostSVN(name='pull.clang-tools-extra', mode='incremental',
                      method='fresh',
                      repourl='http://llvm.org/svn/llvm-project/'
                              'clang-tools-extra/trunk',
                      workdir='clang-tools-extra.src', alwaysUseLatest=False,
                      retry=(60, 5), description='pull.clang-tools-extra'))
    f = phasedbuilderutils.SVNCleanupStep(f, 'compiler-rt.src')
    f.addStep(HostSVN(name='pull.compiler-rt', mode='incremental',
                      method='fresh',
                      repourl='http://llvm.org/svn/llvm-project/compiler-rt/'
                              'trunk',
                      workdir='compiler-rt.src', alwaysUseLatest=False,
                      retry=(60, 5), description='pull.compiler-rt'))
    f = phasedbuilderutils.SVNCleanupStep(f, 'libcxx.src')
    f.addStep(HostSVN(name='pull.libcxx', mode='incremental',
                      method='fresh',
                      repourl='http://llvm.org/svn/llvm-project/libcxx/'
                              'trunk',
                      workdir='libcxx.src', alwaysUseLatest=False,
                      retry=(60, 5), description='pull.libcxx'))
    f = phasedbuilderutils.SVNCleanupStep(f, 'debuginfo-tests.src')
    f.addStep(HostSVN(name='pull.debuginfo-tests', mode='incremental',
                      method='fresh',
                      repourl='http://llvm.org/svn/llvm-project/debuginfo-tests/'
                              'trunk',
                      workdir='debuginfo-tests.src', alwaysUseLatest=False,
                      retry=(60, 5), description='pull.debuginfo-tests'))

    # Create symlinks to the clang compiler-rt sources inside the LLVM tree.
    # We don't actually check out the sources there, because the SVN purge
    # would always remove them then.
    f.addStep(buildbot.steps.shell.ShellCommand(
              name='ln.clang-sources', haltOnFailure=True,
              command=['ln', '-sfv', '../../clang.src', 'clang'],
              workdir='llvm/tools', description=['ln', 'clang sources']))
    f.addStep(buildbot.steps.shell.ShellCommand(
              name='ln.compiler-rt-sources',
              command=['ln', '-sfv', '../../compiler-rt.src', 'compiler-rt'],
              haltOnFailure=True, workdir='llvm/projects',
              description=['ln', 'compiler-rt sources']))
    f.addStep(buildbot.steps.shell.ShellCommand(
              name='ln.libcxx.sources',
              command=['ln', '-sfv', '../../libcxx.src', 'libcxx'],
              haltOnFailure=True, workdir='llvm/projects',
              description=['ln', 'libcxx sources']))
    f.addStep(buildbot.steps.shell.ShellCommand(
              name='cp.clang-tools-extra-sources',
              command=['cp', '-Rfv', '../../clang-tools-extra.src', 'extra'],
              haltOnFailure=True, workdir='clang.src/tools',
              description=['cp', 'clang-tools-extra sources']))
    f.addStep(buildbot.steps.shell.ShellCommand(
              name='cp.debuginfo-tests.sources',
              command=['cp', '-Rfv', 'debuginfo-tests.src',
                       'clang.src/test/debuginfo-tests'],
              haltOnFailure=True, workdir=WithProperties('%(builddir)s'),
              description=['cp', 'debuginfo-tests sources']))

    # Clean the install directory.
    f.addStep(buildbot.steps.shell.ShellCommand(
              name='rm.clang-install', command=['sudo', 'rm', '-rfv', 'clang-install'],
              haltOnFailure=False, description=['rm dir', 'clang-install'],
              workdir=WithProperties('%(builddir)s')))
    # Construct the configure arguments.
    configure_args = ['../llvm/configure']
    configure_args.extend(config_options)
    configure_args.extend(['--disable-bindings',
                           '--enable-keep-symbols',
                           '--enable-targets=x86,x86_64,arm,aarch64'])
    configure_args.append(
        WithProperties('--prefix=%(builddir)s/clang-install'))    
    
    # If we are using a previously built compiler, download it and override CC
    # and CXX.
    if is_bootstrap:
        f = artifacts.GetCompilerArtifacts(f)
    else:
        f = phasedbuilderutils.GetLatestValidated(f)
    cc_command = ['find', 'host-compiler', '-name', 'clang']
    f.addStep(buildbot.steps.shell.SetProperty(
              name='find.cc',
              command=cc_command,
              extract_fn=phasedbuilderutils.find_cc,
              workdir=WithProperties('%(builddir)s')))
    f.addStep(buildbot.steps.shell.ShellCommand(
              name='sanity.test', haltOnFailure=True,
              command=[WithProperties('%(builddir)s/%(cc_path)s'), '-v'],
              description=['sanity test']))
    configure_args.extend([
            WithProperties('CC=%(builddir)s/%(cc_path)s'),
            WithProperties('CXX=%(builddir)s/%(cc_path)s++')])
    
    # If we need to use lto, find liblto, add in proper flags here, etc.
    if use_lto:
        liblto_command = ['find', WithProperties('%(builddir)s/host-compiler'),
                          '-name', 'libLTO.dylib']
        f.addStep(buildbot.steps.shell.SetProperty(
                name='find.liblto',
                command=liblto_command,
                extract_fn=phasedbuilderutils.find_liblto,
                workdir=WithProperties('%(builddir)s')))
        configure_args.append(
          '--with-extra-options=-flto -gline-tables-only')
    
    # Configure the LLVM build.
    if incremental:
        # *NOTE* This is a temporary work around. I am eventually going to just
        # set up cmake/ninja but for now I am sticking with the make => I need
        # configure to run only after a failure so on success I have incremental
        # builds.
        f.addStep(buildbot.steps.shell.ShellCommand(
                name='configure.with.host', command=configure_args,
                haltOnFailure=True, description=['configure'],
                workdir=clang_build_dir,
                doStepIf=_did_last_build_fail))
    else:
        f.addStep(buildbot.steps.shell.ShellCommand(
                name='configure.with.host', command=configure_args,
                haltOnFailure=True, description=['configure'],
                workdir=clang_build_dir))
    
    # Build the compiler.
    make_command = ['make', '-j', WithProperties('%(jobs)s'), 'VERBOSE=1']
    timeout = 40*60 # Normal timeout is 20 minutes.
    if use_lto:
        make_command.append(WithProperties('DYLD_LIBRARY_PATH=%(liblto_path)s'))
        timeout = 240*60 # LTO timeout is 240 minutes.
    
    f.addStep(buildbot.steps.shell.ShellCommand(
              name='make', command=make_command,
              haltOnFailure=True, description=['make'], workdir=clang_build_dir,
              timeout=timeout))
    # Use make install-clang to produce minimal archive for use by downstream
    # builders.
    f.addStep(buildbot.steps.shell.ShellCommand(
              name='make.install-clang', haltOnFailure=True,
              command=['make', 'install-clang', '-j',
                       WithProperties('%(jobs)s'),
                       'RC_SUPPORTED_ARCHS=armv7 i386 x86_64'],
              description=['make install'], workdir=clang_build_dir))
    # Save artifacts of this build for use by other builders.
    f = artifacts.uploadArtifacts(f)
    # Run the LLVM and Clang regression tests.
    cmd_str = r"""make VERBOSE=1 LIT_ARGS="-v --param run_long_tests=true --filter='^(?!.*debuginfo-tests)'" check-all"""
    f.addStep(lit_test_command.LitTestCommand(name='run.llvm.tests', haltOnFailure=True,
                                              command=cmd_str,
                                              description=['all', 'tests'],
                                              workdir=clang_build_dir))
    # Work around for lldb issue rdar://14929651
    # The crazy filter regex is to remove static-member[2].cpp, which requires xcode5 or later.
    # radar://16295455 tracks the removal of this regex.
    cmd_str = r"""make VERBOSE=1 LIT_ARGS="-j 1 -v --param run_long_tests=true  --filter='debuginfo-tests.(?!static-member)'" check-all"""
    f.addStep(lit_test_command.LitTestCommand(name='run.llvm.debuginfo-tests', haltOnFailure=True,
                                              command=cmd_str,
                                              description=['all', 'tests'],
                                              workdir=clang_build_dir))
    return f