正则表达式pcre在Android下的移植

http://www.cnblogs.com/hibraincol/archive/2011/10/15/2213714.html

因为项目需要在android的NDK开发中使用pcre正则表达式库，而android系统中并没有自带该库，所以就得另外移植了， 下面是移植的详细步骤：

 

1. 下载pcre源码，可以到。

2. 将pcre-7.8 的源码拷贝至android源码树下的external/pcre目录下。

3. 将下面的Android.mk文件拷贝到external/pcre目录下。

Android.mk:

#---------------------------------------------------------------------------------
#

#  Android makefile for libpcre

#

#  This makefile generates libpcre.a, pcregrep and pcre.h ONLY.

#  It should be amended to build libpcreposix.a, libpcrecpp.a

#  and tests.

 

LOCAL_PATH := $(call my-dir)

 

###

### Build libpcre.a and pcre.h

###

 

include $(CLEAR_VARS)

 

#step 1:

# to generate the files  config.h pcre.h pcre_chartables.c

#

GEN := $(LOCAL_PATH)/config.h

$(GEN): $(LOCAL_PATH)/config.h.generic

    $(hide) cp $(LOCAL_PATH)/config.h.generic $@

LOCAL_GENERATED_SOURCES += $(GEN)

 

GEN := $(LOCAL_PATH)/pcre.h

$(GEN): $(LOCAL_PATH)/pcre.h.generic

    $(hide) cp $(LOCAL_PATH)/pcre.h.generic $@

LOCAL_GENERATED_SOURCES += $(GEN)

 

GEN := $(LOCAL_PATH)/pcre_chartables.c

$(GEN): $(LOCAL_PATH)/pcre_chartables.c.dist

    $(hide) cp $(LOCAL_PATH)/pcre_chartables.c.dist $@

LOCAL_GENERATED_SOURCES += $(GEN)

 

#step 2:

#clear the vars generated by the step 1

#

include $(CLEAR_VARS)

 

LOCAL_SRC_FILES :=  \

  pcre_compile.c \

  pcre_config.c \

  pcre_dfa_exec.c \

  pcre_exec.c \

  pcre_fullinfo.c \

  pcre_get.c \

  pcre_globals.c \

  pcre_info.c \

  pcre_internal.h \

  pcre_maketables.c \

  pcre_newline.c \

  pcre_ord2utf8.c \

  pcre_refcount.c \

  pcre_study.c \

  pcre_tables.c \

  pcre_try_flipped.c \

  pcre_ucd.c \

  pcre_valid_utf8.c \

  pcre_version.c \

  pcre_xclass.c \

  pcre_chartables.c \

  ucp.h \

  pcre.h \

  config.h

 

#copy the pcre.h to out/target/product/generic/obj/include/libpcre

#

LOCAL_COPY_HEADERS := pcre.h

LOCAL_COPY_HEADERS_TO := libpcre

 

LOCAL_CFLAGS += -O3 -I. -DHAVE_CONFIG_H

 

LOCAL_MODULE := libpcre

LOCAL_MODULE_CLASS := STATIC_LIBRARIES

LOCAL_PRELINK_MODULE := false

 

include $(BUILD_STATIC_LIBRARY)

 

###

### Build pcregrep

###

 

include $(CLEAR_VARS)

 

LOCAL_MODULE := pcregrep

LOCAL_SRC_FILES := pcregrep.c

LOCAL_CFLAGS += -O3 -I. -DHAVE_CONFIG_H

LOCAL_STATIC_LIBRARIES := libpcre

 

include $(BUILD_EXECUTABLE)

#---------------------------------------------------------------------------------

4. cd 到 android的源码树的根目录下，输入命令：

. build/envsetup.sh

chooseproduct
mmm external/pcre
从下面的log可以看到生成了libpcre.a库：

然后只要把libpcre.a库和头文件pcre.h拷贝到你的android应用工程中，然后就可以在ndk中使用这个pcre库了。