[英]Using C library in Android NDK with external dependency
I have an OCR library written in C that I wish to run on Android using the Native Development Kit (NDK). 我有一个用C编写的OCR库,希望使用本机开发套件(NDK)在Android上运行。 I am an experienced Android developer, but not with the NDK (or C for that matter).
我是一位经验丰富的Android开发人员,但没有使用NDK(或C)。 I have set-up numerous hello world sample programs, and now I think that the first question I need to answer is:
我已经建立了许多hello world示例程序,现在我认为我需要回答的第一个问题是:
The OCR library requires another dependency in the makefile: libtiff , which provides support for .TIFF image files. OCR库在makefile中需要另一个依赖项: libtiff ,它提供对.TIFF图像文件的支持。 How can I add this dependency to the project and represent it in an Android.mk file?
如何将这种依赖关系添加到项目中并在Android.mk文件中表示出来? Can anyone link to any similar examples?
任何人都可以链接到任何类似的示例吗?
Here is some code from the OCR makefile: 这是OCR makefile中的一些代码:
TIFF = {your_tiff_path}/libtiff.a
INCLUDES= {your_tiff_path}/include
DEFS = -DDO_USE_32BIT -DLUT_POPCNT -DTIFF_FORMAT
OPT = -O3
CFLAGS = $(OPT) -g $(INCLUDES) $(PROFILE) $(DEFS)
# Add -m32 to build 32bit on 64bit machine
CC = gcc -m32
LDFLAGS = $(OPT) $(PROFILE)
OBJECTS = cputime.o BitArr.o bits.o chardat.o symbol.o page.o get_skew.o \
ccrx.o readtiff.o label.o glyph.o loadcontrols.o loadbestfont.o \
qsegment.o makeBnodes.o makeLnodes.o runocr.o lineocr.o extract.o \
splitchars.o compare.o scoreit.o lm_class.o lmdp.o \
ocrfont.o glyphsubs.o binio.o ocrmain.o unicode.o
TARGET = ccr8
$(TARGET): $(OBJECTS)
$(CC) $(LDFLAGS) -o $(TARGET) $(OBJECTS) $(TIFF) -lm -lc
label.o: label.c page.h CCR.h BitArr.h bits.h
...
...
...
Use the "standalone toolchain" - this is a tool to reuse generic makefiles for Android. 使用“独立工具链”-这是一个可为Android重用通用Makefile的工具。 It is well described in the docs that you installed with the NDK.
与NDK一起安装的文档中对此进行了很好的描述。
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