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:
#
# 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：
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'
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。
posted on
