pip install fails with Xcode 5.1

Following the python Getting Started guide, the 'pip install couchbase' fails with the following error:

pip install couchbase
Downloading/unpacking couchbase
Downloading couchbase-1.2.0.tar.gz (254kB): 254kB downloaded
Running setup.py (path:/private/tmp/pip_build_root/couchbase/setup.py) egg_info for package couchbase

Installing collected packages: couchbase
Running setup.py install for couchbase
building 'couchbase._libcouchbase' extension
cc -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -mno-fused-madd -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch x86_64 -arch i386 -pipe -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/exceptions.c -o build/temp.macosx-10.9-intel-2.7/src/exceptions.o
clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
error: command 'cc' failed with exit status 1
Complete output from command /usr/bin/python -c "import setuptools, tokenize;_file='/private/tmp/pip_build_root/couchbase/setup.py';exec(compile(getattr(tokenize, 'open', open)(file).read().replace('\r\n', '\n'), __file_, 'exec'))" install --record /tmp/pip-GHEKAF-record/install-record.txt --single-version-externally-managed --compile:
running install

running build

running build_py

creating build

creating build/lib.macosx-10.9-intel-2.7

creating build/lib.macosx-10.9-intel-2.7/couchbase

copying couchbase/_init_.py -> build/lib.macosx-10.9-intel-2.7/couchbase

copying couchbase/_bootstrap.py -> build/lib.macosx-10.9-intel-2.7/couchbase

copying couchbase/_pyport.py -> build/lib.macosx-10.9-intel-2.7/couchbase

copying couchbase/_version.py -> build/lib.macosx-10.9-intel-2.7/couchbase

copying couchbase/admin.py -> build/lib.macosx-10.9-intel-2.7/couchbase

copying couchbase/connection.py -> build/lib.macosx-10.9-intel-2.7/couchbase

copying couchbase/exceptions.py -> build/lib.macosx-10.9-intel-2.7/couchbase

copying couchbase/experimental.py -> build/lib.macosx-10.9-intel-2.7/couchbase

copying couchbase/items.py -> build/lib.macosx-10.9-intel-2.7/couchbase

copying couchbase/mockserver.py -> build/lib.macosx-10.9-intel-2.7/couchbase

copying couchbase/result.py -> build/lib.macosx-10.9-intel-2.7/couchbase

copying couchbase/transcoder.py -> build/lib.macosx-10.9-intel-2.7/couchbase

copying couchbase/user_constants.py -> build/lib.macosx-10.9-intel-2.7/couchbase

creating build/lib.macosx-10.9-intel-2.7/couchbase/views

copying couchbase/views/_init_.py -> build/lib.macosx-10.9-intel-2.7/couchbase/views

copying couchbase/views/iterator.py -> build/lib.macosx-10.9-intel-2.7/couchbase/views

copying couchbase/views/params.py -> build/lib.macosx-10.9-intel-2.7/couchbase/views

creating build/lib.macosx-10.9-intel-2.7/couchbase/iops

copying couchbase/iops/_init_.py -> build/lib.macosx-10.9-intel-2.7/couchbase/iops

copying couchbase/iops/base.py -> build/lib.macosx-10.9-intel-2.7/couchbase/iops

copying couchbase/iops/select.py -> build/lib.macosx-10.9-intel-2.7/couchbase/iops

creating build/lib.macosx-10.9-intel-2.7/couchbase/async

copying couchbase/async/_init_.py -> build/lib.macosx-10.9-intel-2.7/couchbase/async

copying couchbase/async/connection.py -> build/lib.macosx-10.9-intel-2.7/couchbase/async

copying couchbase/async/events.py -> build/lib.macosx-10.9-intel-2.7/couchbase/async

copying couchbase/async/view.py -> build/lib.macosx-10.9-intel-2.7/couchbase/async

creating build/lib.macosx-10.9-intel-2.7/couchbase/tests

copying couchbase/tests/_init_.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests

copying couchbase/tests/base.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests

copying couchbase/tests/importer.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests

copying couchbase/tests/test_sync.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests

creating build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/_init_.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/admin_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/append_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/arithmetic_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/badargs_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/connection_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/couchbase_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/delete_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/design_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/dupkeys_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/empty_key_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/encodings_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/endure_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/excextra_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/format_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/get_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/iops_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/itemsyntax_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/itertypes_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/itmops_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/lock_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/lockmode_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/misc_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/observe_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/pipeline_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/querystrings_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/results_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/rget_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/set_converters_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/set_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/stats_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/touch_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/transcoder_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/view_iterator_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

copying couchbase/tests/cases/view_t.py -> build/lib.macosx-10.9-intel-2.7/couchbase/tests/cases

creating build/lib.macosx-10.9-intel-2.7/gcouchbase

copying gcouchbase/_init_.py -> build/lib.macosx-10.9-intel-2.7/gcouchbase

copying gcouchbase/connection.py -> build/lib.macosx-10.9-intel-2.7/gcouchbase

copying gcouchbase/iops_gevent0x.py -> build/lib.macosx-10.9-intel-2.7/gcouchbase

copying gcouchbase/iops_gevent10.py -> build/lib.macosx-10.9-intel-2.7/gcouchbase

creating build/lib.macosx-10.9-intel-2.7/txcouchbase

copying txcouchbase/_init_.py -> build/lib.macosx-10.9-intel-2.7/txcouchbase

copying txcouchbase/connection.py -> build/lib.macosx-10.9-intel-2.7/txcouchbase

copying txcouchbase/iops.py -> build/lib.macosx-10.9-intel-2.7/txcouchbase

running build_ext

building 'couchbase._libcouchbase' extension

creating build/temp.macosx-10.9-intel-2.7

creating build/temp.macosx-10.9-intel-2.7/src

creating build/temp.macosx-10.9-intel-2.7/src/viewrow

creating build/temp.macosx-10.9-intel-2.7/src/contrib

creating build/temp.macosx-10.9-intel-2.7/src/contrib/jsonsl

cc -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -mno-fused-madd -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch x86_64 -arch i386 -pipe -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/exceptions.c -o build/temp.macosx-10.9-intel-2.7/src/exceptions.o

clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]

clang: note: this will be a hard error (cannot be downgraded to a warning) in the future

error: command 'cc' failed with exit status 1

----------------------------------------
Cleaning up...
Command /usr/bin/python -c "import setuptools, tokenize;_file='/private/tmp/pip_build_root/couchbase/setup.py';exec(compile(getattr(tokenize, 'open', open)(file).read().replace('\r\n', '\n'), __file_, 'exec'))" install --record /tmp/pip-GHEKAF-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /private/tmp/pip_build_root/couchbase
Storing debug log for failure in /Users/dhaikney/Library/Logs/pip.log

The following page suggests that Xcode has hardened its treatment of such warnings to turn them into errors: http://kaspermunck.github.io/2014/03/fixing-clang-error/

Temporary workaround is to set the following flag prior to running pip:
export ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future