can't compile avahi on android

Question

I am a newbie in cross compilation and I was assigned the task to use the android patch http://avahi.org/ticket/354 to compile avahi core to android. ndk-build avahi-configure V=1 was successful, but when I ran: ndk-build V=1 NDK_LOG=2 APP_ABI="armeabi armeabi-v7a", it gives tons of warning and also make error on socket.o

Any suggestion is welcomed.

Error: /home/ruoruo/Software/android- ndk-r8b/platforms/android-14/arch-arm/usr/include/linux/if.h:85:12: warning: comma at end of enumerator list [-pedantic] /home/ruoruo/Software/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/linux/if.h:90:22: warning: comma at end of enumerator list [-pedantic] /home/ruoruo/Software/android-ndk-r8b/samples/avahi_exports/jni/avahi-core/socket.c:68:8: error: redefinition of 'struct in6_pktinfo' /home/ruoruo/Software/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/linux /ipv6.h:21:8: note: originally defined here /home/ruoruo/Software/android-ndk-r8b/samples/avahi_exports/jni/avahi-core/socket.c: In function 'avahi_mdns_mcast_join_ipv6': /home/ruoruo/Software/android-ndk-r8b/samples/avahi_exports/jni/avahi-core/socket.c:150:64: warning: unused parameter 'a' [-Wunused-parameter] /home/ruoruo/Software/android-ndk-r8b/samples/avahi_exports/jni/avahi-core/socket.c: In function 'avahi_recv_dns_packet_ipv4': /home/ruoruo/Software/android-ndk-r8b/samples/avahi_exports/jni/avahi-core/socket.c:647:9: warning: variable 'found_addr' set but not used [-Wunused-but-set-variable] /home/ruoruo/Software/android-ndk-r8b/samples/avahi_exports/jni/avahi-core/socket.c: In function 'avahi_recv_dns_packet_ipv6': /home/ruoruo/Software/android-ndk-r8b/samples/avahi_exports/jni/avahi-core/socket.c:809:24: warning: variable 'found_iface' set but not used [-Wunused-but-set-variable] /home/ruoruo/Software/android-ndk-r8b/samples/avahi_exports/jni/avahi-core/socket.c:809:9: warning: variable 'found_ttl' set but not used [-Wunused-but-set-variable] make: * [/home/ruoruo/Software/android-ndk-r8b/samples/avahi_exports/obj/local/armeabi/objs/avahi-core/socket.o] Error 1

Here is my Android.mk

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

AVAHI_TOP := /home/ruoruo/Software/android-ndk-r8b/samples/avahi_exports/jni
CONFIGURE := configure
CONFIGURE_LDFLAGS := -lc -ldl

AVAHI_BUILT_SOURCES := \
    avahi-common/Android.mk \
    avahi-core/Android.mk \
    avahi-client-uninstalled.pc \
    avahi-client/Android.mk \
    avahi-utils/Android.mk \
    avahi-glib/Android.mk \
    avahi-glib-uninstalled.pc \
    avahi-gobject/Android.mk \
    avahi-gobject-uninstalled.pc \
    avahi-daemon/Android.mk

avahi-configure-real:
    cd $(AVAHI_TOP) ; \
#    CC="$(CONFIGURE_CC)" \
#    CFLAGS="$(CONFIGURE_CFLAGS)" \
#    LD=$(TARGET_LD) \
    LDFLAGS="$(CONFIGURE_LDFLAGS)" \
#    CPP=$(CONFIGURE_CPP) \
#    CPPFLAGS="$(CONFIGURE_CPPFLAGS)" \
#    PKG_CONFIG_LIBDIR=$(CONFIGURE_PKG_CONFIG_LIBDIR) \17
#    PKG_CONFIG_TOP_BUILD_DIR=$(PKG_CONFIG_TOP_BUILD_DIR) \
    $(AVAHI_TOP)/$(CONFIGURE) --host=arm-linux-androideabi \
    --disable-nls --disable-gtk --disable-gtk3 \
    --disable-dbus --disable-python \
    --disable-xmltoman --with-xml=none \
    --disable-glib --disable-gobject --disable-qt3 --disable-qt4 \
    --disable-gdbm --disable-libdaemon \
    --with-distro=none --disable-core-docs \
    --disable-Werror
    echo "before make file"
    for file in $(AVAHI_BUILT_SOURCES); do \
       rm -f $$file && \
        make -C $$(dirname $$file) $$(basename $$file) ; \
    done

    avahi-configure: avahi-configure-real

    .PHONY: avahi-configure

    CONFIGURE_TARGETS += avahi-configure

    #include all the subdirs...
    #-include $(AVAHI_TOP)/avahi-common/Android.mk
    #-include $(AVAHI_TOP)/avahi-client/Android.mk
    -include $(AVAHI_TOP)/avahi-core/Android.mk
    #-include $(AVAHI_TOP)/avahi-daemon/Android.mk
    #-include $(AVAHI_TOP)/avahi-glib/Android.mk
    #-include $(AVAHI_TOP)/avahi-gobject/Android.mk
    #-include $(AVAHI_TOP)/avahi-utils/Android.mk

#generate libavahi.so and libavahi.a
LOCAL_MODULE    := avahi_static
LOCAL_MODULE_FILENAME := libavahi
-include $(BUILD_STATIC_LIBRARY)

LOCAL_MODULE    := avahi_shared
LOCAL_MODULE_FILENAME := libavahi
-include $(BUILD_SHARED_LIBRARY)

Answer 1

1.tar avahi-0.6.31
2.patch -p1 < 0001-Add-Android-support.patch (http://avahi.org/ticket/354)
patch -p1 < 0002-Add-uninstalled.pc.in-files.patch 

3.cd avahi-0.6.31 ./configure --sysconfdir=/etc --localstatedir=/var make 

4.cd the subdirectories make Android.mk 

then,you will see Android.mk in all the subdirectories.


5.ndk-build V=1 NDK_LOG=2 APP_ABI="armeabi armeabi-v7a"

Answer 2

Create Application.mk with the following content:

APP_OPTIM := release
APP_PLATFORM := android-7
APP_STL := gnustl_static
APP_CPPFLAGS += -frtti 
APP_CPPFLAGS += -fexceptions
APP_CPPFLAGS += -DANDROID
APP_ABI := armeabi armeabi-v7a
APP_MODULES := avahi_static

Then omit APP_ABI="armeabi armeabi-v7a" in your ndk-build command.

Answer 3

The patch you have downloaded is not up-to-date. The latest NDK, r8b, contains the file linux/ipv6.h which could not be found on the earlier versions of NDK. Unfortunately this change to NDK, welcome as it is, has never been documented.

This means that you must undo the patch to socket.c file, by removing the lines

67  #ifdef __BIONIC__ 
68  struct in6_pktinfo { 
69      struct in6_addr ipi6_addr; 
70      int ipi6_ifindex; 
71  }; 
72  #endif 
73   

from avahi-core/socket.c file.