g++ -MMD -O3 -Wall -ffast-math -finline-functions -fomit-frame-pointer -fno-strict-aliasing -fPIC  Bchart.o BchartSm.o Bst.o FBinaryArray.o CntxArray.o ChartBase.o ClassRule.o ECArgs.o Edge.o EdgeHeap.o ExtPos.o Feat.o Feature.o FeatureTree.o Field.o FullHist.o GotIter.o InputTree.o Item.o Link.o Params.o ParseStats.o SentRep.o ScoreTree.o Term.o TimeIt.o UnitRules.o ValHeap.o edgeSubFns.o ewDciTokStrm.o extraMain.o fhSubFns.o headFinder.o headFinderCh.o utils.o MeChart.o  parseIt.o -o parseIt -D_REENTRANT -D_XOPEN_SOURCE=600 -lpthread
/Applications/Xcode.app/Contents/Developer/usr/bin/make -C second-stage/programs/features best-parses
g++ -MMD -O3 -Wall -ffast-math -finline-functions -fomit-frame-pointer -fno-strict-aliasing -fPIC  -Wno-deprecated   -c -o best-parses.o best-parses.cc
In file included from best-parses.cc:50:
./popen.h:25:10: fatal error: 'ext/stdio_filebuf.h' file not found
#include <ext/stdio_filebuf.h>
         ^
1 error generated.
make[1]: *** [best-parses.o] Error 1
make: *** [reranker-runtime] Error 2