I tried to use std::function in my project, having read here and there that C++ 11 is quite well supported. However simply using std::function makes the build fail:
[armeabi] Compile++ thumb: MyAppNative <= MyAppNative.cpp
jni/MyAppNative.cpp: In function 'jint JNI_OnLoad(JavaVM*, void*)':
jni/MyAppNative.cpp:7:2: error: 'function' is not a member of 'std'
std::function<void()> func;
^
jni/MyAppNative.cpp:7:24: error: 'func' was not declared in this scope
std::function<void()> func;
^
make: *** [obj/local/armeabi/objs/MyAppNative/MyAppNative.o] Error 1
My question is: is std::function supposed to be supported? I've seen it conditionally defined in the header, depending on _STLP_USE_BOOST_SUPPORT. Is that normal? I have attached a sample project if anyone is interested in testing.
http://www.filedropper.com/cpp11-functional-issue
Cheers
STLport, which you seem to be using, has never had C++11 support.
See developer.android.com/ndk/guides/cpp-support.html at "How to set your runtime" and choose a different one (gnustl_static or c++_static).
Ok so thanks to Christian and Alex, the answer is indeed to change your Application.mk so that it references gnustl_static.
APP_STL := gnustl_static
Thank you all!
Related
I am having great difficulty with a step in compiling CyanogenMod 11(Android 4.4) for an unsupported device based on an MSM7x27A/Snapdragon S1 platform. When I attempt to build libstagefright, I come up with an undefined reference error to functions in android::LPAPlayer::*, including the constructor. The error I get is:
Copying: /home/dyngar-f/android/android/out/target/common/obj/JAVA_LIBRARIES/mms-common_intermediates/noproguard.classes.jar
frameworks/av/media/libstagefright/AwesomePlayer.cpp:1282: error: undefined reference to 'android::LPAPlayer::LPAPlayer(android::sp<android::MediaPlayerBase::AudioSink> const&, bool&, android::AwesomePlayer*)'
frameworks/av/media/libstagefright/AwesomePlayer.cpp:1306: error: undefined reference to 'android::LPAPlayer::mObjectsAlive'
frameworks/av/media/libstagefright/AwesomePlayer.cpp:1882: error: undefined reference to 'android::LPAPlayer::mObjectsAlive'
collect2: error: ld returned 1 exit statusbuild/core/shared_library.mk:81: recipe for target '/home/dyngar-f/android/android/out/target/product/schS738c/obj/SHARED_LIBRARIES/libstagefright_intermediates/LINKED/libstagefright.so' failed
make: *** [/home/dyngar-f/android/android/out/target/product/schS738c/obj/SHARED_LIBRARIES/libstagefright_intermediates/LINKED/libstagefright.so] Error 1make: *** Waiting for unfinished jobs....
I have searched high and low and I found no mention of this error that leads me to a solution to this problem, and I haven't arrived at a solution myself. Here are the references to this issue I have found from others:
Gist from CMartinBaughman
Mentioned in XDA Thread on this page there is also an answer that doesn't seem to work.
Can anyone guide me to a solution for this issue?
The error is coming from the linker which is unable to find the reference to LPAPlayer which is actually a customization in CyanogenMod sources. From the latest tree, Android.mk for libstagefright is not including LPAPlayer.cpp for all platforms.
To resolve your issue, please try by adding the following files in Android.mk between lines 114-117
#New lines included
ifeq ($(call is-chipset-in-board-platform,msm7x27),true)
LOCAL_SRC_FILES += LPAPlayer.cpp
LOCAL_CFLAGS += -DLEGACY_LPA -DUSE_LPA_MODE
endif
ifeq ($(call is-chipset-in-board-platform,msm7x30),true)
LOCAL_SRC_FILES += LPAPlayer.cpp
LOCAL_CFLAGS += -DLEGACY_LPA -DUSE_LPA_MODE
endif
The platform name may need to be modified to suit the actual name (Please refer to BoardConfig.mk).
I am trying to build my code for h.264 video decoding using hardware decoder(OMX codec) in native code of android 4.0.4 by keeping it in the android source tree. The android source is already built. I am using mm command to build my decoder module.
But when I try to build it I am getting the following error
prebuilt/linux-x86/toolchain/arm-linux-androideabi-4.4.x/bin/../lib/gcc/arm-linux-androideabi/4.4.3/../../../../arm-linux-androideabi/bin/ld:
out/target/product/generic/obj/SHARED_LIBRARIES/custom_decoder_intermediates/custom_decoder.o:
in function custom_decoder::decode_video():frameworks/base/include/utils/RefBase.h:171:
error: undefined reference to 'android_atomic_dec'
when I explored about it, came to know that android_atomic_dec is defined in cutils/atomic.h
which is in system/core/libcutils and the header at system/core/include/cutils of AOSP 4.0.4.
So I have added this also in my android.mk via LOCAL_C_INCLUDES but still to get the same error.
Can someone help me to solve this ??....
You must add cutils to the linkage stage:
LOCAL_LDLIBS += -L $(path-to-system-libs) -lcutils
If you are building AOSP tree, use instead the following:
LOCAL_SHARED_LIBRARIES += libcutils
I am trying to create a cocos2d-x-android demo and I got these errors.
Android NDK: WARNING: APP_PLATFORM android-18 is larger than android:minSdkVersion 8 in ./AndroidManifest.xml "
"Android NDK: WARNING:/Users/linyou/Documents/cocos2d-x/F10Attack/proj.android/../../cocos2dx""/Android.mk:cocos2dx_static: LOCAL_LDLIBS is always ignored for static libraries
"Compile++ thumb : cocosdenshion_static <= SimpleAudioEngine.cpp"
"/Users/linyou/Documents/cocos2d-x/F10Attack/proj.android/../../CocosDenshion/android/SimpleAudioEngine.cpp: In constructor 'CocosDenshion::SimpleAudioEngine::SimpleAudioEngine()':
/Users/linyou/Documents/cocos2d-x/F10Attack/proj.android/../../CocosDenshion/android/SimpleAudioEngine.cpp:77:2: error: format not a string literal and no format arguments [-Werror=format-security]"
"cc1plus: some warnings being treated as errors"
"make: *** [obj/local/armeabi/objs/cocosdenshion_static/SimpleAudioEngine.o] Error 1
Can you help me? thanks!
haha,Nobody know the solution.Today,I have getten the solution. NDK r9 is the builder,the makelog code will be ERRORs. Maybe the cocos2dx team don't take notice of it.Want to fix it, Just delete it.
You can avoid this editing your configuration file
$PROJECT_HOME/proj.android/jni/Application.mk
adding this to the compiler flags
APP_CFLAGS += -Wno-error=format-security
So you will not get errors caused by that kind of warnings.
When I build as static library, the source code builds well in Android JellyBean 4.1.2 using the mm command. But when I try to build the opencv folder under android/external/opencv as static library, with the following changes in android/external/opencv/Android.mk
+ LOCAL_SHARED_LIBRARIES+= libdl
and
- include $(BUILD_STATIC_LIBRARY)
+ include $(BUILD_SHARED_LIBRARY)
- LOCAL_STATIC_LIBRARIES := libcxcore libcv libcvaux libcvml libcvhighgui
+ LOCAL_SHARED_LIBRARIES := libcxcore libcv libcvaux libcvml libcvhighgui
I get the following error:
android/prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.6/bin/../lib/gcc/arm-linux-androideabi/4.6.x-google/../../../../arm-linux-androideabi/bin/ld: internal error in thumb_branch_common, at /tmp/android-8532/src/build/../binutils/binutils-2.21/gold/arm.cc:4148
collect2: ld returned 1 exit status
make: *** [out/target/product/mydevice/obj/SHARED_LIBRARIES/libcxcore_intermediates/LINKED/libcxcore.so] Error 1
Any idea on how to fix this error?
Thanks in advance.
Regards,
Jai
,,, arm-linux-androideabi/bin/ld: internal error in thumb_branch_common,
at /tmp/android-8532/src/build/../binutils/binutils-2.21/gold/arm.cc:4148
collect2: ld returned 1 exit status
Any idea on how to fix this error?
In Binutils, file arm.cc, Line 4148 there was an Internal Error (in Binutils).
Try newer Binutils (or older) or fix the Bug and submit the Patch.
You can also switch to a different Toolchain (using a different Binutils) and
try that. Sometimes Compiler switches will alter the operation enough to avoid
the Bug.
There is a CHANCE that simply altering the order of the Function in the Source File
of the Code you are compiling (NOT gold/arm.cc, that is where the Compiler Bug is,
change YOUR Source) and that Binutils will read the newly ordered Code differently
and thus avoid the Binutils Bug.
It is also possible that the Code you are linking (the .o Files) was corrupted
either on Disk or by a Bug in the Compiler, or that it is for the wrong endian
(etc.) and that is not being detected.
PS: Thumb-2 Code (in the Compiler's Toolchain) is not Bug free (as you noticed).
See here for some People working on a fix:
http://git.openembedded.org/openembedded-core-contrib/commit/?h=kraj/gold&id=b72f3238ad32ab420306a0226d8c2e57c52ddf45
... and this is what they came up with:
http://sourceware.org/bugzilla/attachment.cgi?id=6284&action=diff
Over the last few days I've been having a difficult time trying to build avahi into a static or shared library for use with an existing Android NDK project.
We have a few games in the App and Play stores and my task is to get multiplayer working in the Android versions.
Specifically the task involves replacing the Bonjour component so that these games can connect to each other via zeroconf.
Research seemed to indicate that avahi is the lib that we're looking for, but at this point I'm open to anything that will work!
I'm hoping that someone here can either help me get avahi compiling or suggest another more appropriate (and easier to install) lib.
Project uses android-ndk-r8b and is being built on OSX 10.7.4 using command line (not eclipse)
Got the latest Avahi source from here:
http://www.linuxfromscratch.org/blfs/view/svn/basicnet/avahi.html
homebrewed all the necessary libs to get ./configure to run without errors.
./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var --disable-static --disable-mono --disable-monodoc --disable-gdbm --disable-libdaemon --disable-nls --disable-gtk --disable-gtk3 --disable-python --disable-qt3 --disable-qt4 --enable-core-docs --with-distro=none
./configure runs with no apparent red flags.
make results in this compile error:
socket.c: In function 'ipv6_pktinfo':
socket.c:271: warning: unused variable 'yes' [-Wunused-variable]
socket.c:270: warning: unused parameter 'fd' [-Wunused-parameter]
socket.c: In function 'avahi_send_dns_packet_ipv6':
socket.c:609: error: 'IPV6_PKTINFO' undeclared (first use in this function)
socket.c:609: error: (Each undeclared identifier is reported only once
socket.c:609: error: for each function it appears in.)
socket.c: In function 'avahi_recv_dns_packet_ipv6':
socket.c:869: error: 'IPV6_HOPLIMIT' undeclared (first use in this function)
socket.c:878: error: 'IPV6_PKTINFO' undeclared (first use in this function)
make[2]: *** [libavahi_core_la-socket.lo] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2
Figured that it's not building against the android-ndk-r8b libs or finding ipv6.h or something.
Checked my .bash_profile.sh file:
export PATH=/Users/Muy01/Projects/Development/Android/android-sdks/tools/:$PATH
export PATH=/Users/Muy01/Projects/Development/Android/android-sdks/platform-tools/:$PATH
export PATH=/Users/Muy01/Projects/Development/Android/android-ndk-r8b/:$PATH
added --host=arm-linux-androideabi to the ./configure arguments list
resulting in this error:
checking host system type... Invalid configuration `arm-linux-androideabi': system `androideabi' not recognized
Couldn't figure out how to get a list of available host system types so changed direction and decided to try and build the static lib via Android.mk file.
Found this post on creating an appropriate Android.mk file:
can't compile avahi on android
Realized that I don't have Android.mk files within all the subdirectories.
Researched, downloaded, built, Androgenizer to try and convert all the Makefile.am files into Android.mk files.
http://cgit.collabora.com/git/user/derek/androgenizer.git/
Couldn't figure out or find info on how to do that though =/
Decided to try and create my own Android.mk file:
LOCAL_PATH := $(call my-dir)
ROOT_LOCAL_PATH :=$(call my-dir)
#Build avahi into a static lib
include $(CLEAR_VARS)
AVAHI_TOP := $(ROOT_LOCAL_PATH)/../avahi-0.6.31
MY_SOURCES := $(wildcard $(AVAHI_TOP)/avahi-core/*.c*)
MY_SOURCES += $(wildcard $(AVAHI_TOP)/avahi-common/*.c*)
LOCAL_C_INCLUDES := $(AVAHI_TOP)
LOCAL_SRC_FILES := $(MY_SOURCES:$(LOCAL_PATH)%=%)
LOCAL_MODULE := avahi
include $(BUILD_STATIC_LIBRARY)
Results in compile time errors for avahi-core/iface-linux.c:33:0:
/avahi-0.6.31/avahi-core/iface-linux.h:27:8: Redefinition of 'struct AvahiInterfaceMonitorOSDep'
/avahi-0.6.31/avahi-core/iface.h:46:16: Originally defined here
/avahi-0.6.31/avahi-core/iface-linux.h:33:9: Redeclaration of enumerator 'LIST_IFACE'
/avahi-0.6.31/avahi-core/iface.h:52:9: Previous definition of 'LIST_IFACE' was here
/avahi-0.6.31/avahi-core/iface-linux.h:34:9: Redeclaration of enumerator 'LIST_ADDR'
/avahi-0.6.31/avahi-core/iface.h:53:9: Previous definition of 'LIST_ADDR' was here
/avahi-0.6.31/avahi-core/iface-linux.h:35:9: Redeclaration of enumerator 'LIST_DONE'
/avahi-0.6.31/avahi-core/iface.h:54:9: Previous definition of 'LIST_DONE' was here
/jni//../avahi-0.6.31/avahi-core/iface-linux.c: In function 'netlink_callback':
And now I'm pretty much stuck.
I tried #if 0'ing out the iface-linux.c and h files resulting in a cascading slew of other errors, so prob a bad idea.
Thinking that it may be something I've done wrong with the ./configure command?
Perhaps an issue with my Android.mk file?
I figure this must be something that quite a few developers are dealing with so I'm probably missing something because I can't seem to find any good information via google.
Any help would be much appreciated!
I've sent this out to the avhi mailing list as well, if I get a response there I will post here for posterity.
Thanks,
Chris
I'll follow up here with the solution that worked for me.
My solution was to use JMDNS instead of Avahi.
There's not much traffic on the Avahi mailing list.
JMDNS has working examples available.
JMDNS took me about 4 hours to set up within my NDK environment and about a day to work out some "kinks."
tar avahi-0.6.31
patch -p1 < 0001-Add-Android-support.patch
patch -p1 < 0002-Add-uninstalled.pc.in-files.patch
cd avahi-0.6.31
./configure --sysconfdir=/etc --localstatedir=/var
make
cd the subdirectories: make Android.mk
then, you will see Android.mk in all the subdirectories.
ndk-build V=1 NDK_LOG=2 APP_ABI="armeabi armeabi-v7a"