我正在尝试使用 android ndk r5 为 android 编译 tesseract，通过检查https://android.googlesource.com/platform/external/tesseract获得 tesseract 的代码，我无法编译 tesseract 并出现错误，
> StaticLibrary : libstdc++.a
SharedLibrary : libocr.so
out/apps/tesseract/armeabi/objs/ocr/liblept/jpegio.o: In function `pixWriteStrea
mJpeg':
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:496: undefined reference to `jpeg_std_error'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:499: undefined reference to `jpeg_CreateCompress'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:500: undefined reference to `jpeg_stdio_dest'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:514: undefined reference to `jpeg_set_defaults'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:528: undefined reference to `jpeg_set_quality'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:533: undefined reference to `jpeg_start_compress'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:536: undefined reference to `jpeg_write_marker'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:579: undefined reference to `jpeg_finish_compress'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:588: undefined reference to `jpeg_destroy_compress'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:576: undefined reference to `jpeg_write_scanlines'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:563: undefined reference to `jpeg_write_scanlines'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:530: undefined reference to `jpeg_simple_progression'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:496: undefined reference to `jpeg_std_error'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:499: undefined reference to `jpeg_CreateCompress'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:500: undefined reference to `jpeg_stdio_dest'
out/apps/tesseract/armeabi/objs/ocr/liblept/jpegio.o: In function `jpeg_error_do
_not_exit':
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:1009: undefined reference to `jpeg_destroy'
out/apps/tesseract/armeabi/objs/ocr/liblept/jpegio.o: In function `pixReadStream
Jpeg':
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:218: undefined reference to `jpeg_std_error'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:221: undefined reference to `jpeg_CreateDecompress'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:224: undefined reference to `jpeg_set_marker_processor'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:225: undefined reference to `jpeg_stdio_src'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:226: undefined reference to `jpeg_read_header'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:230: undefined reference to `jpeg_calc_output_dimensions'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:268: undefined reference to `jpeg_start_decompress'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:294: undefined reference to `jpeg_read_scanlines'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:357: undefined reference to `jpeg_finish_decompress'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:358: undefined reference to `jpeg_destroy_decompress'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:332: undefined reference to `jpeg_read_scanlines'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:273: undefined reference to `jpeg_start_decompress'
E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe
gio.c:264: undefined reference to `jpeg_start_decompress'
collect2: ld returned 1 exit status
make: *** [out/apps/tesseract/armeabi/libocr.so] Error 1
我的 android.mk 看起来像这样，libjpeg 包含在 LOCAL_STATIC_LIBRARIES 中
ifneq ($(TARGET_SIMULATOR),true)
LOCAL_PATH:= /cygdrive/e/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract
BUILD_FOR_HOST:=0
#
# libocr (common)
#
LOCAL_SRC_FILES_:= \
ccutil/ambigs.cpp \
ccutil/basedir.cpp \
ccutil/bits16.cpp \
ccutil/boxread.cpp \
ccutil/clst.cpp \
ccutil/debugwin.cpp \
ccutil/elst.cpp \
ccutil/elst2.cpp \
ccutil/errcode.cpp \
ccutil/globaloc.cpp \
ccutil/hashfn.cpp \
ccutil/mainblk.cpp \
ccutil/memblk.cpp \
ccutil/memry.cpp \
ccutil/mfcpch.cpp \
ccutil/ocrshell.cpp \
ccutil/scanutils.cpp \
ccutil/serialis.cpp \
ccutil/strngs.cpp \
ccutil/tessdatamanager.cpp \
ccutil/tessopt.cpp \
ccutil/tordvars.cpp \
ccutil/tprintf.cpp \
ccutil/unichar.cpp \
ccutil/unicharmap.cpp \
ccutil/unicharset.cpp \
ccutil/varable.cpp \
ccutil/ccutil.cpp
LOCAL_SRC_FILES_+= \
api/baseapi.cpp
LOCAL_SRC_FILES_+= \
viewer/scrollview.cpp \
viewer/svmnode.cpp \
viewer/svutil.cpp
# viewer/svpaint.cpp \
LOCAL_SRC_FILES_+= \
cutil/bitvec.cpp \
cutil/cutil.cpp \
cutil/danerror.cpp \
cutil/efio.cpp \
cutil/emalloc.cpp \
cutil/freelist.cpp \
cutil/globals.cpp \
cutil/listio.cpp \
cutil/oldheap.cpp \
cutil/oldlist.cpp \
cutil/structures.cpp \
cutil/tessarray.cpp \
cutil/cutil_class.cpp
LOCAL_SRC_FILES_+= \
image/image.cpp \
image/imgbmp.cpp \
image/imgio.cpp \
image/imgs.cpp \
image/imgtiff.cpp \
image/bitstrm.cpp \
image/svshowim.cpp
LOCAL_SRC_FILES_+= \
liblept/adaptmap.c \
liblept/affine.c \
liblept/affinecompose.c \
liblept/arithlow.c \
liblept/arrayaccess.c \
liblept/bardecode.c \
liblept/baseline.c \
liblept/bbuffer.c \
liblept/bilinear.c \
liblept/binarize.c \
liblept/binexpand.c \
liblept/binexpandlow.c \
liblept/binreduce.c \
liblept/binreducelow.c \
liblept/blend.c \
liblept/bmf.c \
liblept/bmpio.c \
liblept/bmpiostub.c \
liblept/boxbasic.c \
liblept/boxfunc1.c \
liblept/boxfunc2.c \
liblept/boxfunc3.c \
liblept/ccbord.c \
liblept/ccthin.c \
liblept/classapp.c \
liblept/colorcontent.c \
liblept/colormap.c \
liblept/colormorph.c \
liblept/colorquant1.c \
liblept/colorquant2.c \
liblept/colorseg.c \
liblept/compare.c \
liblept/conncomp.c \
liblept/convolve.c \
liblept/convolvelow.c \
liblept/correlscore.c \
liblept/dwacomb.2.c \
liblept/dwacomblow.2.c \
liblept/edge.c \
liblept/endiantest.c \
liblept/enhance.c \
liblept/fhmtauto.c \
liblept/fhmtgen.1.c \
liblept/fhmtgenlow.1.c \
liblept/flipdetect.c \
liblept/fliphmtgen.c \
liblept/fmorphauto.c \
liblept/fmorphgen.1.c \
liblept/fmorphgenlow.1.c \
liblept/fpix1.c \
liblept/fpix2.c \
liblept/gifio.c \
liblept/gifiostub.c \
liblept/gplot.c \
liblept/graphics.c \
liblept/graymorph.c \
liblept/graymorphlow.c \
liblept/grayquant.c \
liblept/grayquantlow.c \
liblept/heap.c \
liblept/jbclass.c \
liblept/jpegio.c \
liblept/jpegiostub.c \
liblept/kernel.c \
liblept/list.c \
liblept/maze.c \
liblept/morphapp.c \
liblept/morph.c \
liblept/morphdwa.c \
liblept/morphseq.c \
liblept/numabasic.c \
liblept/numafunc1.c \
liblept/numafunc2.c \
liblept/pageseg.c \
liblept/paintcmap.c \
liblept/parseprotos.c \
liblept/partition.c \
liblept/pix1.c \
liblept/pix2.c \
liblept/pix3.c \
liblept/pix4.c \
liblept/pixabasic.c \
liblept/pixacc.c \
liblept/pixafunc1.c \
liblept/pixafunc2.c \
liblept/pixalloc.c \
liblept/pixarith.c \
liblept/pixconv.c \
liblept/pixtiling.c \
liblept/pngio.c \
liblept/pngiostub.c \
liblept/pnmio.c \
liblept/pnmiostub.c \
liblept/projective.c \
liblept/psio.c \
liblept/psiostub.c \
liblept/ptra.c \
liblept/pts.c \
liblept/queue.c \
liblept/rank.c \
liblept/readbarcode.c \
liblept/readfile.c \
liblept/rop.c \
liblept/ropiplow.c \
liblept/roplow.c \
liblept/rotateam.c \
liblept/rotateamlow.c \
liblept/rotate.c \
liblept/rotateorth.c \
liblept/rotateorthlow.c \
liblept/rotateshear.c \
liblept/runlength.c \
liblept/sarray.c \
liblept/scale.c \
liblept/scalelow.c \
liblept/seedfill.c \
liblept/seedfilllow.c \
liblept/sel1.c \
liblept/sel2.c \
liblept/selgen.c \
liblept/shear.c \
liblept/skew.c \
liblept/stack.c \
liblept/textops.c \
liblept/tiffio.c \
liblept/tiffiostub.c \
liblept/utils.c \
liblept/viewfiles.c \
liblept/warper.c \
liblept/watershed.c \
liblept/writefile.c \
liblept/zlibmem.c \
liblept/zlibmemstub.c \
LOCAL_SRC_FILES_+= \
ccstruct/blobbox.cpp \
ccstruct/blobs.cpp \
ccstruct/blread.cpp \
ccstruct/callcpp.cpp \
ccstruct/coutln.cpp \
ccstruct/detlinefit.cpp \
ccstruct/genblob.cpp \
ccstruct/labls.cpp \
ccstruct/linlsq.cpp \
ccstruct/lmedsq.cpp \
ccstruct/mod128.cpp \
ccstruct/normalis.cpp \
ccstruct/ocrblock.cpp \
ccstruct/ocrrow.cpp \
ccstruct/otsuthr.cpp \
ccstruct/pageres.cpp \
ccstruct/pdblock.cpp \
ccstruct/points.cpp \
ccstruct/polyaprx.cpp \
ccstruct/polyblk.cpp \
ccstruct/polyblob.cpp \
ccstruct/polyvert.cpp \
ccstruct/poutline.cpp \
ccstruct/quadlsq.cpp \
ccstruct/quadratc.cpp \
ccstruct/quspline.cpp \
ccstruct/ratngs.cpp \
ccstruct/rect.cpp \
ccstruct/rejctmap.cpp \
ccstruct/statistc.cpp \
ccstruct/stepblob.cpp \
ccstruct/vecfuncs.cpp \
ccstruct/werd.cpp \
ccstruct/ccstruct.cpp
LOCAL_SRC_FILES_+= \
dict/choices.cpp \
dict/context.cpp \
dict/conversion.cpp \
dict/dawg.cpp \
dict/dict.cpp \
dict/hyphen.cpp \
dict/permdawg.cpp \
dict/permngram.cpp \
dict/permute.cpp \
dict/states.cpp \
dict/stopper.cpp \
dict/trie.cpp
LOCAL_SRC_FILES_+= \
classify/adaptive.cpp \
classify/adaptmatch.cpp \
classify/baseline.cpp \
classify/blobclass.cpp \
classify/chartoname.cpp \
classify/classify.cpp \
classify/cluster.cpp \
classify/clusttool.cpp \
classify/cutoffs.cpp \
classify/extract.cpp \
classify/featdefs.cpp \
classify/flexfx.cpp \
classify/float2int.cpp \
classify/fpoint.cpp \
classify/fxdefs.cpp \
classify/hideedge.cpp \
classify/intfx.cpp \
classify/intmatcher.cpp \
classify/intproto.cpp \
classify/kdtree.cpp \
classify/mf.cpp \
classify/mfdefs.cpp \
classify/mfoutline.cpp \
classify/mfx.cpp \
classify/normfeat.cpp \
classify/normmatch.cpp \
classify/ocrfeatures.cpp\
classify/outfeat.cpp \
classify/picofeat.cpp \
classify/protos.cpp \
classify/speckle.cpp \
classify/xform2d.cpp
LOCAL_SRC_FILES_+= \
wordrec/associate.cpp \
wordrec/badwords.cpp \
wordrec/bestfirst.cpp \
wordrec/chop.cpp \
wordrec/chopper.cpp \
wordrec/closed.cpp \
wordrec/drawfx.cpp \
wordrec/findseam.cpp \
wordrec/gradechop.cpp \
wordrec/heuristic.cpp \
wordrec/makechop.cpp \
wordrec/matchtab.cpp \
wordrec/matrix.cpp \
wordrec/metrics.cpp \
wordrec/mfvars.cpp \
wordrec/olutil.cpp \
wordrec/outlines.cpp \
wordrec/pieces.cpp \
wordrec/plotedges.cpp \
wordrec/plotseg.cpp \
wordrec/render.cpp \
wordrec/seam.cpp \
wordrec/split.cpp \
wordrec/tally.cpp \
wordrec/tessinit.cpp \
wordrec/tface.cpp \
wordrec/wordclass.cpp \
wordrec/wordrec.cpp
LOCAL_SRC_FILES_+= \
ccmain/tessvars.cpp \
ccmain/tstruct.cpp \
ccmain/reject.cpp \
ccmain/callnet.cpp \
ccmain/charcut.cpp \
ccmain/docqual.cpp \
ccmain/paircmp.cpp \
ccmain/adaptions.cpp \
ccmain/ambigsrecog.cpp \
ccmain/applybox.cpp \
ccmain/blobcmp.cpp \
ccmain/charsample.cpp \
ccmain/control.cpp \
ccmain/expandblob.cpp \
ccmain/fixspace.cpp \
ccmain/fixxht.cpp \
ccmain/imgscale.cpp \
ccmain/matmatch.cpp \
ccmain/osdetect.cpp \
ccmain/output.cpp \
ccmain/pagewalk.cpp \
ccmain/pgedit.cpp \
ccmain/scaleimg.cpp \
ccmain/tessbox.cpp \
ccmain/tesseractclass.cpp \
ccmain/tfacepp.cpp \
ccmain/thresholder.cpp \
ccmain/varabled.cpp \
ccmain/werdit.cpp \
ccmain/tessedit.cpp
# ccmain/tessembedded.cpp \
LOCAL_SRC_FILES_+= \
textord/alignedblob.cpp \
textord/bbgrid.cpp \
textord/blkocc.cpp \
textord/colfind.cpp \
textord/colpartition.cpp \
textord/colpartitionset.cpp \
textord/drawedg.cpp \
textord/drawtord.cpp \
textord/edgblob.cpp \
textord/edgloop.cpp \
textord/fpchop.cpp \
textord/gap_map.cpp \
textord/imagefind.cpp \
textord/linefind.cpp \
textord/makerow.cpp \
textord/oldbasel.cpp \
textord/pagesegmain.cpp \
textord/pithsync.cpp \
textord/pitsync1.cpp \
textord/scanedg.cpp \
textord/sortflts.cpp \
textord/strokewidth.cpp \
textord/tabfind.cpp \
textord/tablefind.cpp \
textord/tabvector.cpp \
textord/topitch.cpp \
textord/tordmain.cpp \
textord/tospace.cpp \
textord/tovars.cpp \
textord/underlin.cpp \
textord/wordseg.cpp \
textord/workingpartset.cpp
LOCAL_C_INCLUDES_+= \
$(LOCAL_PATH)/ccmain \
$(LOCAL_PATH)/api \
$(LOCAL_PATH)/ccstruct \
$(LOCAL_PATH)/cstruct \
$(LOCAL_PATH)/cutil \
$(LOCAL_PATH)/ccutil \
$(LOCAL_PATH)/ccmain \
$(LOCAL_PATH)/image \
$(LOCAL_PATH)/include \
$(LOCAL_PATH)/liblept \
$(LOCAL_PATH)/dict \
$(LOCAL_PATH)/classify \
$(LOCAL_PATH)/viewer \
$(LOCAL_PATH)/wordrec \
$(LOCAL_PATH)/textord \
external/jpeg
LOCAL_CFLAGS_:= \
-DGRAPHICS_DISABLED \
-DHAVE_LIBLEPT \
-O3
# -DFST_DISABLED \
# -DDISABLE_INTEGER_MATCHING \
# -DDISABLE_DOC_DICT \
LOCAL_STATIC_LIBRARIES_:= \
libjpeg
#
# libocr (native)
#
include $(CLEAR_VARS)
LOCAL_SRC_FILES:=$(LOCAL_SRC_FILES_) \
api/jni.cpp \
liblept/_open_memstream.c \
liblept/_fopencookie.c \
liblept/_fmemopen.c
LOCAL_C_INCLUDES:=$(LOCAL_C_INCLUDES_)
LOCAL_CFLAGS:=$(LOCAL_CFLAGS_)
LOCAL_STATIC_LIBRARIES:=$(LOCAL_STATIC_LIBRARIES_)
LOCAL_SHARED_LIBRARIES:= \
liblog
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE:= libocr
LOCAL_PRELINK_MODULE:= false
include $(BUILD_SHARED_LIBRARY)
ifeq ($(BUILD_FOR_HOST),1)
#
# libocr (host)
#
include $(CLEAR_VARS)
LOCAL_SRC_FILES:=$(LOCAL_SRC_FILES_) api/jni.cpp
LOCAL_C_INCLUDES:=$(LOCAL_C_INCLUDES_)
LOCAL_CFLAGS:=$(LOCAL_CFLAGS_)
LOCAL_STATIC_LIBRARIES:=$(LOCAL_STATIC_LIBRARIES_)
LOCAL_SHARED_LIBRARIES:=$(LOCAL_SHARED_LIBRARIES_)
LOCAL_MODULE:= libocr
include $(BUILD_HOST_SHARED_LIBRARY)
#
# tesseract test (host)
#
include $(CLEAR_VARS)
LOCAL_MODULE:= tesseract
LOCAL_SRC_FILES:= \
api/tesseractmain.cpp
LOCAL_CFLAGS:= \
-DGRAPHICS_DISABLED \
-DHAVE_LIBLEPT \
-DFST_DISABLED \
-DBUILD_HOST
LOCAL_C_INCLUDES+= \
$(LOCAL_PATH)/ccutil \
$(LOCAL_PATH)/ccstruct \
$(LOCAL_PATH)/image \
$(LOCAL_PATH)/include \
$(LOCAL_PATH)/dict \
$(LOCAL_PATH)/classify \
$(LOCAL_PATH)/wordrec \
$(LOCAL_PATH)/viewer \
$(LOCAL_PATH)/cutil \
$(LOCAL_PATH)/textord \
$(LOCAL_PATH)/api \
$(LOCAL_PATH)/ccmain
LOCAL_SHARED_LIBRARIES:= \
libocr
include $(BUILD_HOST_EXECUTABLE)
#
# simple raw-YUV test (host)
#
include $(CLEAR_VARS)
LOCAL_MODULE:= tesseract
LOCAL_SRC_FILES:= \
ccmain/jni.cpp
LOCAL_CFLAGS:= \
-DGRAPHICS_DISABLED \
-DHAVE_LIBLEPT \
-DFST_DISABLED \
-DBUILD_HOST
LOCAL_C_INCLUDES+= \
$(LOCAL_PATH)/ccutil \
$(LOCAL_PATH)/ccstruct \
$(LOCAL_PATH)/image \
$(LOCAL_PATH)/include \
$(LOCAL_PATH)/liblept \
$(LOCAL_PATH)/dict \
$(LOCAL_PATH)/classify \
$(LOCAL_PATH)/wordrec \
$(LOCAL_PATH)/viewer \
$(LOCAL_PATH)/cutil \
$(LOCAL_PATH)/textord \
$(LOCAL_PATH)/api \
$(LOCAL_PATH)/ccmain
LOCAL_SHARED_LIBRARIES:= \
libocr
#include $(BUILD_HOST_EXECUTABLE)
endif #BUILD_FOR_HOST
endif #TARGET_SIMULATOR
请帮助我为 android 构建 tesseract。