Android NDK:尝试移植JnetPcap

我发现了一个Android流量监控应用程序Shark:它基于JnetPcap，有一个包含所有源文件和相应的Android.mk文件的文件。我将jni目录放在Android NDK的示例文件中，并尝试使用NDK build-C构建它。在编译过程中出现了一些错误。以下是我获取的错误日志：

make: Entering directory `/home/thanasis/android-ndk-r5b/samples    /jnetpcap_pure/jni'
Compile thumb  : jnetpcap <= util_crc16.c
Compile thumb  : jnetpcap <= util_crc32.c
Compile++ thumb  : jnetpcap <= jnetpcap.cpp
Compile++ thumb  : jnetpcap <= packet_flow.cpp
Compile++ thumb  : jnetpcap <= packet_jheader.cpp
Compile++ thumb  : jnetpcap <= jnetpcap_pcap_header.cpp
Compile++ thumb  : jnetpcap <= nio_jbuffer.cpp
Compile++ thumb  : jnetpcap <= winpcap_stat_ex.cpp
Compile++ thumb  : jnetpcap <= winpcap_send_queue.cpp
Compile++ thumb  : jnetpcap <= winpcap_ext.cpp
Compile++ thumb  : jnetpcap <= jnetpcap_ids.cpp
Compile++ thumb  : jnetpcap <= jnetpcap_dumper.cpp
Compile++ thumb  : jnetpcap <= jnetpcap_utils.cpp
Compile++ thumb  : jnetpcap <= util_in_cksum.cpp
Compile++ thumb  : jnetpcap <= jnetpcap_beta.cpp
Compile++ thumb  : jnetpcap <= nio_jmemory.cpp
Compile++ thumb  : jnetpcap <= packet_jsmall_scanner.cpp
Compile++ thumb  : jnetpcap <= packet_protocol.cpp
Compile++ thumb  : jnetpcap <= nio_jnumber.cpp
Compile++ thumb  : jnetpcap <= packet_jheader_scanner.cpp
Compile++ thumb  : jnetpcap <= packet_jscan.cpp
Compile++ thumb  : jnetpcap <= util_checksum.cpp
Compile++ thumb  : jnetpcap <= packet_jpacket.cpp
Compile++ thumb  : jnetpcap <= winpcap_ids.cpp
Compile++ thumb  : jnetpcap <= util_debug.cpp
Compile++ thumb  : jnetpcap <= jnetpcap_bpf.cpp
Compile thumb  : pcap <= bpf_dump.c
Compile thumb  : pcap <= bpf_filter.c
Compile thumb  : pcap <= bpf_image.c
Compile thumb  : pcap <= etherent.c
Compile thumb  : pcap <= fad-gifc.c
Compile thumb  : pcap <= gencode.c
yacc  /home/thanasis/android-ndk-r5b/samples/jnetpcap_pure    /jni/libpcap/grammar.y 
mv -f y.tab.c /home/thanasis/android-ndk-r5b/samples/jnetpcap_pure    /jni/libpcap/grammar.c
Compile thumb  : pcap <= grammar.c
Compile thumb  : pcap <= inet.c
Compile thumb  : pcap <= nametoaddr.c
Compile thumb  : pcap <= optimize.c
Compile thumb  : pcap <= pcap.c
Compile thumb  : pcap <= pcap-linux.c
Compile thumb  : pcap <= savefile.c
Compile thumb  : pcap <= scanner.c
Compile thumb  : pcap <= version.c
StaticLibrary  : libpcap.a
StaticLibrary  : libstdc++.a
SharedLibrary  : libjnetpcap.so
/home/thanasis/android-ndk-r5b/samples/jnetpcap_pure/obj/local    /armeabi/libpcap.a(gencode.o): In function `pcap_compile':
/home/thanasis/android-ndk-r5b/samples/jnetpcap_pure/jni/libpcap    /gencode.c:389: undefined reference to `pcap_parse'
/home/thanasis/android-ndk-r5b/samples/jnetpcap_pure/obj/local    /armeabi/libpcap.a(grammar.o): In function `yyparse':
/home/thanasis/android-ndk-r5b/samples/jnetpcap_pure    /jni/y.tab.c:1941: undefined reference to `yylex'
/home/thanasis/android-ndk-r5b/samples/jnetpcap_pure/obj/local    /armeabi/libpcap.a(scanner.o): In function `pcap_lex':
/home/thanasis/android-ndk-r5b/samples/jnetpcap_pure    /jni/scanner.l:342: undefined reference to `pcap_lval'
/home/thanasis/android-ndk-r5b/samples/jnetpcap_pure/obj/local    /armeabi/libpcap.a(scanner.o): In function `pcap_lex':
/home/thanasis/android-ndk-r5b/samples/jnetpcap_pure    /jni/<stdout>:3554: undefined reference to `pcap_lval'
collect2: ld returned 1 exit status
make: *** [/home/thanasis/android-ndk-r5b/samples/jnetpcap_pure    /obj/local/armeabi/libjnetpcap.so] Error 1
make: Leaving directory `/home/thanasis/android-ndk-r5b    /samples    /jnetpcap_pure/jni' 

/home/thanasis/android-ndk-r5b/samples/jnetpcap_pure/jni/libpcap/android.mk：

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)

LOCAL_SRC_FILES:=\
bpf_dump.c\
bpf/net/bpf_filter.c\
bpf_image.c\
etherent.c\   
fad-gifc.c\
gencode.c\
grammar.c\
inet.c\
nametoaddr.c\
optimize.c\
pcap.c\
pcap-linux.c\
savefile.c\
scanner.c\
version.c

LOCAL_CFLAGS:=-O2 -g
LOCAL_CFLAGS+=-DHAVE_CONFIG_H -D_U_="__attribute__((unused))" -Dlinux -D__GLIBC__ -D_GNU_SOURCE

LOCAL_MODULE:= libpcap

include $(BUILD_STATIC_LIBRARY)

---

有人能帮我吗？

试试递归grep，即grep-r查找项目树上缺少的符号，看看它出现在什么源文件和对象文件中；找出哪一个应该提供它，并确保它被-L和-L链接，或者只是显式地提供对象文件。我也有同样的问题。你有什么进展吗？你面临的问题很简单，你的链接器在路径中看不到预编译库，请检查路径和预编译数据。

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)

LOCAL_SRC_FILES:=\
bpf_dump.c\
bpf/net/bpf_filter.c\
bpf_image.c\
etherent.c\   
fad-gifc.c\
gencode.c\
grammar.c\
inet.c\
nametoaddr.c\
optimize.c\
pcap.c\
pcap-linux.c\
savefile.c\
scanner.c\
version.c

LOCAL_CFLAGS:=-O2 -g
LOCAL_CFLAGS+=-DHAVE_CONFIG_H -D_U_="__attribute__((unused))" -Dlinux -D__GLIBC__ -D_GNU_SOURCE

LOCAL_MODULE:= libpcap

include $(BUILD_STATIC_LIBRARY)