Can't build firefox-35.0

[Steven Sartorius <ssartor%bellatlantic.net@localhost>]

All,

On an amd64 6.1_STABLE system (built from sources as of Jan-17) and a pkgsrc tree checked out via cvs today (Jan-25) I can't get firefox-35.0 to build.  It dies with the following:

rm -f libcontent_base_src.a
/usr/pkgsrc/www/firefox/work.x86_64/build/_virtualenv/bin/python /usr/pkgsrc/www/firefox/work.x86_64/mozilla-release/config/expandlibs_gen.py -o libcontent_base_src.a.desc nsTextFragmentSSE2.o nsImageLoadingContent.o nsContentUtils.o nsObjectLoadingContent.o Attr.o ChildIterator.o Comment.o DOMImplementation.o DOMMatrix.o DOMParser.o DOMPoint.o DOMQuad.o DOMRect.o DOMStringList.o DirectionalityUtils.o DocumentFragment.o DocumentType.o Element.o EventSource.o File.o FileIOObject.o FragmentOrElement.o ImportManager.o Link.o MultipartFileImpl.o NodeIterator.o ResponsiveImageSelector.o ShadowRoot.o StyleSheetList.o Text.o ThirdPartyUtil.o TreeWalker.o WebSocket.o nsAtomListUtils.o nsAttrAndChildArray.o nsAttrValue.o nsAttrValueOrString.o nsCCUncollectableMarker.o nsCSPContext.o nsCSPParser.o nsCSPService.o nsCSPUtils.o nsChannelPolicy.o nsContentAreaDragDrop.o nsContentIterator.o nsContentList.o nsContentPolicy.o nsContentSink.o nsCopySupport.o nsCrossSiteListenerProxy.o nsDOMAttributeMap.o nsDOMCaretPosition.o nsDOMFileReader.o nsDOMMutationObserver.o nsDOMSerializer.o nsDOMSettableTokenList.o nsDOMTokenList.o nsDataDocumentContentPolicy.o nsDocument.o nsDocumentEncoder.o nsElementFrameLoaderOwner.o nsFormData.o nsFrameLoader.o nsFrameMessageManager.o nsGenConImageContent.o nsGenericDOMDataNode.o nsGkAtoms.o nsHTMLContentSerializer.o nsHostObjectProtocolHandler.o nsHostObjectURI.o nsINode.o nsInProcessTabChildGlobal.o nsLineBreaker.o nsMappedAttributeElement.o nsMappedAttributes.o nsMixedContentBlocker.o nsNameSpaceManager.o nsNoDataProtocolContentPolicy.o nsNodeInfoManager.o nsNodeUtils.o nsPlainTextSerializer.o nsPropertyTable.o nsRange.o nsReferencedElement.o nsScriptElement.o nsScriptLoader.o nsStubDocumentObserver.o nsStubMutationObserver.o nsStyleLinkElement.o nsStyledElement.o nsSyncLoadService.o nsTextFragment.o nsTextNode.o nsTraversal.o nsTreeSanitizer.o nsViewportInfo.o nsXHTMLContentSerializer.o nsXMLContentSerializer.o nsXMLHttpRequest.o nsXMLNameSpaceMap.o
gmake[3]: Leaving directory '/usr/pkgsrc/www/firefox/work.x86_64/build/content/base/src'
gmake[2]: Leaving directory '/usr/pkgsrc/www/firefox/work.x86_64/build'
/usr/pkgsrc/www/firefox/work.x86_64/mozilla-release/config/recurse.mk:36: recipe for target 'compile' failed
gmake[1]: *** [compile] Error 2
gmake[1]: Leaving directory '/usr/pkgsrc/www/firefox/work.x86_64/build'
/usr/pkgsrc/www/firefox/work.x86_64/mozilla-release/config/rules.mk:551: recipe for target 'all' failed
gmake: *** [all] Error 2
*** Error code 2

Stop.
make: stopped in /usr/pkgsrc/www/firefox
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/www/firefox

Anybody else seen this?  And ideas?

thanks,

Steve