我正在尝试为Android构建Tesseract。
我已经将Tesseract放在samples文件夹中,路径为
C:\Android_NDK\android-ndk-r8\samples\tesseract
,
其中tesseract文件夹包含tesseract-3.00
、leptonlib-1.66
和libjpeg
文件夹。
每当我尝试使用ndk-build构建代码时,
都会出现以下错误:
C:/Android_NDK/android-ndk-r8/build/core/build-binary.mk:240: *** target pattern contains no '%'. Stop.
我在命令提示符中像这样使用ndk-build:
C:\Android_NDK\android-ndk-r8\samples\tesseract\jni>C:\Android_NDK\android-ndk-r8/ndk-build
tesseract/jni文件夹中的Application.mk
文件的内容如下:
# 由于使用了硬件FPU,ARMv7显著更快
APP_STL := gnustl_static
APP_ABI := armeabi armeabi-v7a
APP_OPTIM := release
APP_CPPFLAGS += -fexceptions -frtti
Android.mk file contents in tesseract/jni folder
# NOTE: You must set these variables to their respective source paths before
# compiling. For example, set LEPTONICA_PATH to the directory containing
# the Leptonica configure file and source folders. Directories must be
# root-relative, e.g. TESSERACT_PATH := /home/username/tesseract-3.00
#
# To set the variables, you can run the following shell commands:
# export TESSERACT_PATH=<path-to-tesseract>
# export LEPTONICA_PATH=<path-to-leptonica>
# export LIBJPEG_PATH=<path-to-libjpeg>
#
# Or you can fill out and uncomment the following definitions:
# TESSERACT_PATH := <path-to-tesseract>
# LEPTONICA_PATH := <path-to-leptonica>
# LIBJPEG_PATH := <path-to-libjpeg>
ifeq "$(TESSERACT_PATH)" ""
$(error You must set the TESSERACT_PATH variable to the Tesseract source \
directory. See README and jni/Android.mk for details)
endif
ifeq "$(LEPTONICA_PATH)" ""
$(error You must set the LEPTONICA_PATH variable to the Leptonica source \
directory. See README and jni/Android.mk for details)
endif
ifeq "$(LIBJPEG_PATH)" ""
$(error You must set the LIBJPEG_PATH variable to the Android JPEG \
source directory. See README and jni/Android.mk for details)
endif
# Just build the Android.mk files in the subdirs
include $(call all-subdir-makefiles) $(LIBJPEG_PATH)/Android.mk
我曾用Cygwin尝试过,但出现了同样的问题。
期待您的回复。
谢谢。