g++ -Wall -O2 -DLINUX   me132_tutorial_2.cc -o me132_tutorial_2 -lcv -lhighgui -lcvaux -lml -lm -lcxcore -ljpeg -lfeat
/tmp/cc2t0yQB.o: In function `main':
me132_tutorial_2.cc:(.text.startup+0x62): undefined reference to `sift_features(_IplImage*, feature**)'
me132_tutorial_2.cc:(.text.startup+0x9c): undefined reference to `sift_features(_IplImage*, feature**)'
me132_tutorial_2.cc:(.text.startup+0xaf): undefined reference to `kdtree_build(feature*, int)'
me132_tutorial_2.cc:(.text.startup+0x3eb): undefined reference to `kdtree_bbf_knn(kd_node*, feature*, int, feature***, int)'
me132_tutorial_2.cc:(.text.startup+0x403): undefined reference to `descr_dist_sq(feature*, feature*)'
me132_tutorial_2.cc:(.text.startup+0x41d): undefined reference to `descr_dist_sq(feature*, feature*)'
collect2: ld returned 1 exit status
make: *** [me132_tutorial_2] Error 1