Index: buildbot/osuosl/master/config/builders.py
===================================================================
--- buildbot/osuosl/master/config/builders.py
+++ buildbot/osuosl/master/config/builders.py
@@ -42,6 +42,10 @@
 reload(Libiomp5Builder)
 from zorg.buildbot.builders import Libiomp5Builder
 
+from zorg.buildbot.builders import LibcxxAndAbiBuilder
+reload(LibcxxAndAbiBuilder)
+from zorg.buildbot.builders import LibcxxAndAbiBuilder
+
 # Plain LLVM builders.
 def _get_llvm_builders():
     return [
@@ -649,6 +653,16 @@
         ]
 
 
+def _get_libcxx_builders():
+    return [
+        {'name': 'libcxx-libcxxabi-x86_64-linux-debian',
+         'slavenames': ['gribozavr4'],
+         'builddir': 'libcxx-libcxxabi-x86_64-linux-debian',
+         'factory': LibcxxAndAbiBuilder.getLibcxxAndAbiBuilder(),
+         'category': 'libcxx'},
+    ]
+
+
 # Experimental and stopped builders
 def _get_experimental_builders():
     return [
@@ -704,6 +718,10 @@
         b['category'] = 'openmp'
         yield b
 
+    for b in _get_libcxx_builders():
+        b['category'] = 'libcxx'
+        yield b
+
     for b in _get_experimental_builders():
         yield b
 
Index: buildbot/osuosl/master/master.cfg
===================================================================
--- buildbot/osuosl/master/master.cfg
+++ buildbot/osuosl/master/master.cfg
@@ -160,6 +160,13 @@
                             change_filter=depends_on([
                                 "openmp"])))
 
+c['schedulers'].append(SingleBranchScheduler(name="libcxx_scheduler",
+                            treeStableTimer=2*60,
+                            builderNames=get_all_for("libcxx"),
+                            change_filter=depends_on([
+                                "libcxx",
+                                "libcxxabi"])))
+
 ####### PROJECT IDENTITY
 
 c['title'] = "LLVM"
Index: zorg/buildbot/builders/LibcxxAndAbiBuilder.py
===================================================================
--- /dev/null
+++ zorg/buildbot/builders/LibcxxAndAbiBuilder.py
@@ -0,0 +1,92 @@
+import os
+
+import buildbot
+import buildbot.process.factory
+import buildbot.steps.shell
+import buildbot.process.properties as properties
+
+from buildbot.steps.source.svn import SVN
+
+import zorg.buildbot.commands.LitTestCommand as lit_test_command
+import zorg.buildbot.util.artifacts as artifacts
+import zorg.buildbot.util.phasedbuilderutils as phased_builder_utils
+
+reload(lit_test_command)
+reload(artifacts)
+reload(phased_builder_utils)
+
+
+def getLibcxxWholeTree(f, src_root):
+    llvm_path = src_root
+    libcxx_path = os.path.join(llvm_path, 'projects/libcxx')
+    libcxxabi_path = os.path.join(llvm_path, 'projects/libcxxabi')
+
+    f = phased_builder_utils.SVNCleanupStep(f, llvm_path)
+    f.addStep(SVN(name='svn-llvm',
+                  mode='full',
+                  baseURL='http://llvm.org/svn/llvm-project/llvm/',
+                  defaultBranch='trunk',
+                  workdir=llvm_path))
+    f.addStep(SVN(name='svn-libcxx',
+                  mode='full',
+                  baseURL='http://llvm.org/svn/llvm-project/libcxx/',
+                  defaultBranch='trunk',
+                  workdir=libcxx_path))
+    f.addStep(SVN(name='svn-libcxxabi',
+                  mode='full',
+                  baseURL='http://llvm.org/svn/llvm-project/libcxxabi/',
+                  defaultBranch='trunk',
+                  workdir=libcxxabi_path))
+    return f
+
+
+def getLibcxxAndAbiBuilder(f=None, env={}):
+    if f is None:
+        f = buildbot.process.factory.BuildFactory()
+
+    # Determine the build directory.
+    f.addStep(properties.SetProperty(name="get_builddir",
+              command=["pwd"],
+              property="builddir",
+              description="set build dir",
+              workdir="."))
+
+    src_root = os.path.join(properties.Property('builddir'), 'llvm')
+    build_path = os.path.join(properties.Property('builddir'), 'build')
+
+    f = getLibcxxWholeTree(f, src_root)
+
+    # Nuke/remake build directory and run CMake
+    f.addStep(buildbot.steps.shell.ShellCommand(
+        name='rm.builddir', command=['rm', '-rf', build_path],
+        haltOnFailure=False, workdir=src_root))
+    f.addStep(buildbot.steps.shell.ShellCommand(
+        name='make.builddir', command=['mkdir', build_path],
+        haltOnFailure=True, workdir=src_root))
+
+    f.addStep(buildbot.steps.shell.ShellCommand(
+        name='cmake', command=['cmake', '..'], haltOnFailure=True,
+        workdir=build_path, env=env))
+
+    # Build libcxxabi
+    jobs_flag = properties.WithProperties('-j%(jobs)s')
+    f.addStep(buildbot.steps.shell.ShellCommand(
+              name='build.libcxxabi', command=['make', jobs_flag, 'cxxabi'],
+              haltOnFailure=True, workdir=build_path))
+
+    # Build libcxx
+    f.addStep(buildbot.steps.shell.ShellCommand(
+              name='build.libcxx', command=['make', jobs_flag, 'cxx'],
+              haltOnFailure=True, workdir=build_path))
+
+    # Test libc++abi
+    f.addStep(buildbot.steps.shell.ShellCommand(
+        name='test.libcxxabi', command=['make', 'check-libcxxabi'],
+        workdir=build_path))
+
+    # Test libc++
+    f.addStep(buildbot.steps.shell.ShellCommand(
+        name='test.libcxx', command=['make', 'check-libcxx'],
+        workdir=build_path))
+
+    return f