Develop Reference

NCurses 6.0 Compilation Error Using Android-NDK

I'm trying to cross-compile ncurses using android-ndk but compilation error shows halfway the process.
Command:
CC=~/my-toolchain/bin/arm-linux-androideabi-gcc ./configure --host=arm-linux-androideabi --prefix=/Android
Output:
** Configuration summary for NCURSES 6.0 20150808:
extended funcs: yes
xterm terminfo: xterm-new
bin directory: /Android/bin
lib directory: /Android/lib
include directory: /Android/include/ncurses
man directory: /Android/share/man
terminfo directory: /Android/share/terminfo
** Include-directory is not in a standard location
Command
make
Output
../objects/tic.o:tic.c:function usage: error: undefined reference to 'stderr'
../objects/tic.o:tic.c:function put_translate: error: undefined reference to 'stdout'
../objects/tic.o:tic.c:function copy_input: error: undefined reference to 'stderr'
../objects/tic.o:tic.c:function open_input: error: undefined reference to 'stdin'
../objects/tic.o:tic.c:function open_input: error: undefined reference to 'stderr'
../objects/tic.o:tic.c:function show_databases: error: undefined reference to 'stdout'
../objects/tic.o:tic.c:function show_databases: error: undefined reference to 'stderr'
../objects/dump_entry.o:dump_entry.c:function show_entry: error: undefined reference to 'stdout'
../objects/dump_entry.o:dump_entry.c:function compare_entry: error: undefined reference to 'stdout'
../lib/libncurses.a(lib_twait.o):lib_twait.c:function _nc_timed_wait: error: undefined reference to '__FD_SET_chk'
../lib/libncurses.a(lib_twait.o):lib_twait.c:function _nc_timed_wait: error: undefined reference to '__FD_SET_chk'
../lib/libncurses.a(lib_twait.o):lib_twait.c:function _nc_timed_wait: error: undefined reference to '__FD_ISSET_chk'
../lib/libncurses.a(lib_twait.o):lib_twait.c:function _nc_timed_wait: error: undefined reference to '__FD_ISSET_chk'
collect2: error: ld returned 1 exit status
Makefile:242: recipe for target 'tic' failed
make[1]: *** [tic] Error 1
make[1]: Leaving directory '/home/jrm/softether/src/curses/ncurses-6.0/progs'
Makefile:113: recipe for target 'all' failed
make: *** [all] Error 2
I don't have any idea about the error. I tried using google but i can't seem to find similar problems like mine.

The usual reason for this error is that you've compiled against android-23 or higher but are linking against something earlier. Another variation of that issue is when you have multiple libraries built against different API levels.
It looks like you are using a standalone toolchain? If that's correct, then I'd suspect your issue is either a prebuilt library that's part of libcurses (FWIR there aren't any of those, so unlikely) or that there's something funky going on in their build scripts that causes one of the two issues I mentioned. Tons of projects add their own Android specific hacks to their build scripts that always end up being the cause of these sorts of issues, so that wouldn't surprise me at all.
Should look at both the compilation command for tic.c and the link command for whatever library/executable is failing to link there. Make sure both are using the same API levels (look for things like $NDK/platforms/android-$API_LEVEL, -D__ANDROID_API__=$API_LEVEL, and -target arm-linux-androideabi$API_LEVEL).
btw, not ncurses 6, but I do have an example showing how to use standalone toolchains that had to build ncurses 5.9: https://github.com/DanAlbert/lua-ndk/blob/master/build_lua_with_libreadline.sh#L75. Might be worth taking a look to see if that helps at all.

GStreamer "undefined reference to '__srget'"

I have troubles to run the GStreamer tutorials. I followed all tutorial steps, and run into an error.
My System:
android-ndk-r11c, gstreamer-sdk-android-arm-debug-2013.6
My System: Windows 10 - 64 bit
The Error:
C:\gstreamer-sdk-android-arm-debug-2013.6\share\gst-sdk\tutorials\android-tutorial-1>ndk-build
GStreamer : [GEN] => gst-build/gstreamer_android.c
GStreamer : [COMPILE] => gst-build/gstreamer_android.c
GStreamer : [LINK] => gst-build/libgstreamer_android.so
lex.priv_gst_parse_yy.c:1598: error: undefined reference to '__srget'
gutils.c:2406: error: undefined reference to 'issetugid'
localcharset.c:158: error: undefined reference to '__srget'
localcharset.c:167: error: undefined reference to '__srget'
./localcharset.c:195: error: undefined reference to '__srget'
/home/slomo/Projects/android/android-ndk-r8e/toolchains/arm-linux-androideabi-4.7/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.7/include-fixed/stdio.h:376: error: undefined reference to '__swbuf'
collect2.exe: error: ld returned 1 exit status
make: *** [buildsharedlibrary] Error 1
C:\gstreamer-sdk-android-arm-debug-2013.6\share\gst-sdk\tutorials\android-tutorial-1>
I tried:
Windows linkage problems : Due to problems related to the standard linker, Google’s Gold Linker is used to build GStreamer applications. Unfortunately, the Android NDK toolchain for Windows does not include the gold linker and the standard one has to be used.
If you observe linkage problems, you can replace the linker in your Android NDK with the gold one from this project. Download the android-ndk-r8b-ma-windows.7z file, extract \android-ndk-r8b\toolchains\arm-linux-androideabi-4.6\prebuilt\windows\arm-linux-androideabi\bin\ld.exe (only this file is needed) and overwrite the one in the same folder in your Android NDK installation.
No effect. Any ideas how to solve this?

I had similar problem before please give a try with ndk10b.It is always good to check in header files for __srget before move forward.

ndk-build fails to build Superpowered audio library after recent NDK update

UPDATE March 19, 2016: Superpowered has released new binaries which work properly with NDK r11
I'm trying to build Superpowered library CrossExample sample project in Android Studio. Until recent NDK update it worked like charm, but now execution of ndk-build gives an error:
Error:error: undefined reference to '__page_size'
I tried building with different toolchains, removing/adding several build flags with no luck so far.
In a different project that uses Superpowered SDK and pretty much the same config I get some other error details. Part of output message log:
/android/ndk/platforms/android-9/arch-x86/usr/include/unistd.h:173: error: undefined reference to '__page_size'
/android/ndk/platforms/android-9/arch-x86/usr/include/unistd.h:173: error: undefined reference to '__page_size'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [/Users/user_name/StudioProjects/project_name/app/src/main/jniSuperpowered/obj/local/x86/libNativeLibName.so] Error 1
make: *** Waiting for unfinished jobs....
/Volumes/iMect/iphone/SuperpoweredSource/decoder/SuperpoweredDecoder.cpp:120: error: undefined reference to '__page_size'
/Volumes/iMect/iphone/SuperpoweredSource/decoder/hlsreader.cpp:582: error: undefined reference to '__page_size'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [/Users/user_name/StudioProjects/project_name/app/src/main/jniSuperpowered/obj/local/armeabi-v7a/libNightcorizerSuperpowered.so] Error 1
FAILURE: Build failed with an exception.
What looks not right is undefined reference to __page_size in unistd.h . However I've got very little idea of further troubleshooting.
Thanks ahead for any help/suggestions!

The changes made in this NDK commit seem to explain the issue you're seeing. According to the commit description, __page_size was replaced with PAGE_SIZE for Android API levels 12 and under. As you're using API level 9 and code which directly references __page_size, you're seeing an effect from this change.
However, it looks like the method signature for int getpagesize() hasn't changed across NDK versions or across API levels, so you should be able to resolve this error by replacing the usage of __page_size with getpagesize() in the following locations:
SuperpoweredSource/decoder/SuperpoweredDecoder.cpp:120
SuperpoweredSource/decoder/hlsreader.cpp:582
Update:
To fix it without modifying the Superpowered source code, you'd need to define the symbol __page_size. To do that, you could build a tiny dummy library which just contains
#include <unistd.h>
extern unsigned int __page_size = getpagesize();
Then, add a module for this library to your Android.mk (or your build.gradle if you're using the new experimental system) and make the module for Superpowered depend on the dummy module.
Or, you could file a bug report with Superpowered.

So as a workaround for the situation I reverted NDK to r10e which worked. Will be using it until Superpowered library gets a fix. Great thanks to #bullsy

Building ImageMagick for Android

I am using https://github.com/lilac/Android-ImageMagick to build an ImageMagick library for Android. When trying to ndk-build ImageMagick I end up with the below errors.
primary0:AndroidMagickActivity primary0$ ~/ndk/ndk-build
SharedLibrary : libandroid-magick.so
/Users/primary0/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/libcoders.a(jpeg.o): in function ReadJPEGImage:jni/../ndk-modules/ImageMagick-6.7.3-0/coders/jpeg.c:988: error: undefined reference to 'jpeg_std_error'
/Users/primary0/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/libcoders.a(jpeg.o): in function ReadJPEGImage:jni/../ndk-modules/ImageMagick-6.7.3-0/coders/jpeg.c:995: error: undefined reference to 'jpeg_destroy_decompress'
/Users/primary0/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/libcoders.a(jpeg.o): in function ReadJPEGImage:jni/../ndk-modules/ImageMagick-6.7.3-0/coders/jpeg.c:1004: error: undefined reference to 'jpeg_CreateDecompress'
/Users/primary0/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/libcoders.a(jpeg.o): in function ReadJPEGImage:jni/../ndk-modules/ImageMagick-6.7.3-0/coders/jpeg.c:1006: error: undefined reference to 'jpeg_set_marker_processor'
/Users/primary0/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/libcoders.a(jpeg.o): in function ReadJPEGImage:jni/../ndk-modules/ImageMagick-6.7.3-0/coders/jpeg.c:1007: error: undefined reference to 'jpeg_set_marker_processor'
/Users/primary0/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/libcoders.a(jpeg.o): in function ReadJPEGImage:jni/../ndk-modules/ImageMagick-6.7.3-0/coders/jpeg.c:1008: error: undefined reference to 'jpeg_set_marker_
.
.
.
collect2: ld returned 1 exit status
make: *** [obj/local/armeabi/libandroid-magick.so] Error 1
primary0:AndroidMagickActivity primary0$
The header file that defines the constants listed in the error is included jpeg.c
#include "jpeglib.h"
Any of you guys have an idea why I'm getting the undefined reference error?

The linker is not looking for "constants" it's looking for jump addresses to call functions. Your code obviously uses functions which are not available in the object code. This can have various reasons. Either you did not tell the compiler to use a library which is availabe or (in your case more likely) you did not tell the compiler that jpeg.c also needs to be compiled for this shared object. But this is difficult to diagnose without seeing the makefile.
Taking a short look at the ndk-modules folder of the git repository I get the feeling you need to build multiple modules. Maybe you just do it in the wrong order. Try building jpeg first.

CMU-Sphinx android build error

I recently using CMU-Sphinx for Android. When I try to build the sample project from the websites, I got the following error:
"Compile thumb : pocketsphinx_jni <= pocketsphinx_wrap.c
C:/CMUSphhinx/PocketSphinxAndroidDemo//jni/pocketsphinx_wrap.c: In function 'nbest_s_hyp':
C:/CMUSphhinx/PocketSphinxAndroidDemo//jni/pocketsphinx_wrap.c:793:6: warning: return makes pointer from integer without a cast [enabled by default]
C:/CMUSphhinx/PocketSphinxAndroidDemo//jni/pocketsphinx_wrap.c: In function 'ps_decoder_s_getHyp':
C:/CMUSphhinx/PocketSphinxAndroidDemo//jni/pocketsphinx_wrap.c:847:3: warning: return makes pointer from integer without a cast [enabled by default]
SharedLibrary : libpocketsphinx_jni.so
C:/CMUSphhinx/PocketSphinxAndroidDemo//obj/local/armeabi/objs/pocketsphinx_jni/pocketsphinx_wrap.o: In function nbest_s_hyp':
C:/CMUSphhinx/PocketSphinxAndroidDemo//jni/pocketsphinx_wrap.c:793: undefined reference tonew_Hypothesis'
C:/CMUSphhinx/PocketSphinxAndroidDemo//obj/local/armeabi/objs/pocketsphinx_jni/pocketsphinx_wrap.o: In function ps_decoder_s_getHyp':
C:/CMUSphhinx/PocketSphinxAndroidDemo//jni/pocketsphinx_wrap.c:847: undefined reference tonew_Hypothesis'
collect2: ld returned 1 exit status
make: * [C:/CMUSphhinx/PocketSphinxAndroidDemo//obj/local/armeabi/libpocketsphinx_jni.so] Error 1
I am using Windows with these tools:
eclipse Indigo.
android 2.2 sdk
android ndkbuild-r8b
swigwin-2.0.8
and this is my configuration on my eclipse:
SWIG:
Main: C:\swigwin-2.0.8\swig.exe
NDK-build:
Main:
C:\android-ndk-r8b\ndk-build.cmd

Try swig 1.3. There could be issues with 2.0. Check full build log for details.

pocketsphinx-0.7 is incompatible with the swig-2.0.8