Go语言视频零基础入门到精通

水中月

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http://sourceforge.net/projects/pcre/下载源码。
我这里使用的是pcre-7.8.tar.gz 。

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:
#

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#  Android makefile for libpcre

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#

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

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

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#  and tests.

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LOCAL_PATH := $(call my-dir)

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###

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### Build libpcre.a and pcre.h

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###

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include $(CLEAR_VARS)

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#step 1:

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

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#

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GEN := $(LOCAL_PATH)/config.h

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

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

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LOCAL_GENERATED_SOURCES += $(GEN)

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GEN := $(LOCAL_PATH)/pcre.h

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

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

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LOCAL_GENERATED_SOURCES += $(GEN)

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GEN := $(LOCAL_PATH)/pcre_chartables.c

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

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

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LOCAL_GENERATED_SOURCES += $(GEN)

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#step 2:

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#clear the vars generated by the step 1

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#

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include $(CLEAR_VARS)

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LOCAL_SRC_FILES :=  \

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  pcre_compile.c \

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  pcre_config.c \

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  pcre_dfa_exec.c \

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  pcre_exec.c \

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  pcre_fullinfo.c \

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  pcre_get.c \

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  pcre_globals.c \

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  pcre_info.c \

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  pcre_internal.h \

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  pcre_maketables.c \

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  pcre_newline.c \

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  pcre_ord2utf8.c \

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  pcre_refcount.c \

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  pcre_study.c \

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  pcre_tables.c \

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  pcre_try_flipped.c \

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  pcre_ucd.c \

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  pcre_valid_utf8.c \

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  pcre_version.c \

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  pcre_xclass.c \

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  pcre_chartables.c \

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  ucp.h \

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  pcre.h \

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  config.h

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

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#

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LOCAL_COPY_HEADERS := pcre.h

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LOCAL_COPY_HEADERS_TO := libpcre

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LOCAL_CFLAGS += -O3 -I. -DHAVE_CONFIG_H

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LOCAL_MODULE := libpcre

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LOCAL_MODULE_CLASS := STATIC_LIBRARIES

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LOCAL_PRELINK_MODULE := false

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include $(BUILD_STATIC_LIBRARY)

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###

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### Build pcregrep

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###

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include $(CLEAR_VARS)

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LOCAL_MODULE := pcregrep

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LOCAL_SRC_FILES := pcregrep.c

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LOCAL_CFLAGS += -O3 -I. -DHAVE_CONFIG_H

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LOCAL_STATIC_LIBRARIES := libpcre

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include $(BUILD_EXECUTABLE)
复制代码4. cd 到 android的源码树的根目录下，输入命令： . build/envsetup.sh

chooseproduct

mmm external/pcre
复制代码从下面的log可以看到生成了libpcre.a库: make: Entering directory `/home/braincol/workspace/android/android_build/android_sdk_froyo'

Header: out/target/product/generic/obj/include/libpcre/pcre.h

target thumb C: pcregrep <= external/pcre/pcregrep.c

target thumb C: libpcre <= external/pcre/pcre_compile.c

target thumb C: libpcre <= external/pcre/pcre_config.c

target thumb C: libpcre <= external/pcre/pcre_dfa_exec.c

target thumb C: libpcre <= external/pcre/pcre_exec.c

target thumb C: libpcre <= external/pcre/pcre_fullinfo.c

target thumb C: libpcre <= external/pcre/pcre_get.c

target thumb C: libpcre <= external/pcre/pcre_globals.c

target thumb C: libpcre <= external/pcre/pcre_info.c

target thumb C: libpcre <= external/pcre/pcre_maketables.c

target thumb C: libpcre <= external/pcre/pcre_newline.c

target thumb C: libpcre <= external/pcre/pcre_ord2utf8.c

target thumb C: libpcre <= external/pcre/pcre_refcount.c

target thumb C: libpcre <= external/pcre/pcre_study.c

target thumb C: libpcre <= external/pcre/pcre_tables.c

target thumb C: libpcre <= external/pcre/pcre_try_flipped.c

target thumb C: libpcre <= external/pcre/pcre_ucd.c

target thumb C: libpcre <= external/pcre/pcre_valid_utf8.c

target thumb C: libpcre <= external/pcre/pcre_version.c

target thumb C: libpcre <= external/pcre/pcre_xclass.c

target thumb C: libpcre <= external/pcre/pcre_chartables.c

target StaticLib: libpcre (out/target/product/generic/obj/STATIC_LIBRARIES/libpcre_intermediates/libpcre.a)

target Executable: pcregrep (out/target/product/generic/obj/EXECUTABLES/pcregrep_intermediates/LINKED/pcregrep)

target Non-prelinked: pcregrep (out/target/product/generic/symbols/system/bin/pcregrep)

target Strip: pcregrep (out/target/product/generic/obj/EXECUTABLES/pcregrep_intermediates/pcregrep)

Install: out/target/product/generic/system/bin/pcregrep

make: Leaving directory `/home/braincol/workspace/android/android_build/android_sdk_froyo'


复制代码然后只要把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。