正则表达式pcre在Android下的移植

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:

?

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

#

#  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。