Compile libav for Android x86_64

Question

I'm trying to compile lib for all architecture, including 64 bits. The script I created works fine for armeabi, armeabi-v7a, arm64-v8a, and x86. It fails for mips, and would probably fail for mips64 as well, but I don't care that much about them ; it is secondary to the main problem that I have : I care about x86_64, and this one won't compile.

EDIT : it fails for x86 as well. Compilation error logs at the end of post.

Here is what the script does :

1. create a standalone toolchain : works like a charm
2. use that toolchain to configure lib :

./configure --arch=x86_64 --cpu=x86_64 --cross-prefix=/some/path/usingLibAV/toolchains/x86_64/bin/x86_64-linux-android- --target-os=android --sysroot="/some/path/Library/Android/ndk/platforms/android-21/arch-x86_64/" --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 -march=atom -ffast-math -msse3 -mfpmath=sse " --extra-ldflags="-Wl,-rpath-link=/some/path/Library/Android/ndk/platforms/android-21/arch-x86_64//usr/lib -L/some/path/Library/Android/ndk/platforms/android-21/arch-x86_64//usr/lib -nostdlib -lc -lm" --enable-shared --disable-symver

This seems to configure well, config.log does not fire any error, except the following warning (which I get for every architecture anyway) :

WARNING: /some/path/Documents/usingLibAV/toolchains/x86_64/bin/x86_64-linux-android-pkg-config not found, library detection may fail.

3. compile : make -j 8. I get .so files properly generated, but if I take a closer look at logs, I get errors at the end (sorry I can't paste the whole logs, it is to long) :

CC libswscale/yuv2rgb.o AR libavformat/libavformat.a YASM libswscale/x86/scale.o AR libavcodec/libavcodec.a AR libavresample/libavresample.a AR libavutil/libavutil.a CC avconv.o CC cmdutils.o CC avconv_opt.o CC avconv_filter.o CC avprobe.o HOSTCC doc/print_options.o AR libavdevice/libavdevice.a LD libavutil/libavutil.so.54 AR libavfilter/libavfilter.a /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libc.so while searching for c /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libz.so while searching for z LD libavresample/libavresample.so.2 /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libc.so while searching for c /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libz.so while searching for z LD libavcodec/libavcodec.so.56 HOSTLD doc/print_options GENTEXI doc/avoptions_format.texi GENTEXI doc/avoptions_codec.texi POD doc/avprobe.pod POD doc/avconv.pod MAN doc/avprobe.1 MAN doc/avconv.1 /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libc.so while searching for c /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libz.so while searching for z LD libavformat/libavformat.so.56 /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libc.so while searching for c /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libz.so while searching for z LD libavdevice/libavdevice.so.55 /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libc.so while searching for c /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libz.so while searching for z LD libswscale/libswscale.so.3 AR libswscale/libswscale.a /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libc.so while searching for c /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libz.so while searching for z LD libavfilter/libavfilter.so.5 /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libc.so while searching for c /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libz.so while searching for z LD avconv LD avprobe /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libc.so while searching for c /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libz.so while searching for z libavcodec/libavcodec.so: error: undefined reference to '__powidf2' collect2: error: ld returned 1 exit status make: * [avprobe] Error 1 make: * Waiting for unfinished jobs.... /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libc.so while searching for c /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libm.so while searching for m /Volumes/diskE/some/path/usingLibAV/toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld: warning: skipping incompatible /some/pathLibrary/Android/ndk/platforms/android-21/arch-x86_64//usr/lib/libz.so while searching for z libavcodec/libavcodec.so: error: undefined reference to '__powidf2' collect2: error: ld returned 1 exit status make: *** [avconv] Error 1

Errors compiling x86, after configuring with : ./configure --arch=x86 --cpu=x86 --cross-prefix=/some/path/Documents/usingLibAV/toolchains/x86/bin/i686-linux-android- --target-os=android --sysroot="/some/path/Library/Android/ndk/platforms/android-9/arch-x86/" --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 -march=atom -ffast-math -msse3 -mfpmath=sse " --extra-ldflags="-Wl,-rpath-link=/some/path/Library/Android/ndk/platforms/android-9/arch-x86//usr/lib -L/some/path/Library/Android/ndk/platforms/android-9/arch-x86//usr/lib -nostdlib -lc -lm" --enable-shared

                                ^
CC  libswscale/x86/yuv2rgb.o
CC  libswscale/yuv2rgb.o
AR  libavformat/libavformat.a
YASM    libswscale/x86/scale.o
AR  libavcodec/libavcodec.a
AR  libavresample/libavresample.a
AR  libavutil/libavutil.a
CC  avconv.o
CC  cmdutils.o
CC  avconv_opt.o
CC  avconv_filter.o
CC  avprobe.o
HOSTCC  doc/print_options.o
AR  libavdevice/libavdevice.a
LD  libavutil/libavutil.so.54
AR  libavfilter/libavfilter.a
HOSTLD  doc/print_options
LD  libavresample/libavresample.so.2
GENTEXI doc/avoptions_format.texi
GENTEXI doc/avoptions_codec.texi
POD doc/avprobe.pod
POD doc/avconv.pod
LD  libavcodec/libavcodec.so.56
MAN doc/avprobe.1
MAN doc/avconv.1
LD  libavformat/libavformat.so.56
LD  libavdevice/libavdevice.so.55
LD  libswscale/libswscale.so.3
AR  libswscale/libswscale.a
LD  libavfilter/libavfilter.so.5
LD  avconv
LD  avprobe
libavdevice/libavdevice.so: error: undefined reference to '__divdi3'
libavdevice/libavdevice.so:libavdevice/libavdevice.so:  errorerror: undefined reference to ': __moddi3'
libavformatundefined reference to '__moddi3'
libavformat/libavformat.so/libavformat.so: error: undefined reference: error to : undefined'__udivdi3' reference to '__udivdi3'
libavformat/
libavformat/libavformat.so: errorlibavformat.so: error: : undefined reference undefined referenceto ' to '__umoddi3'
libavcodec/__umoddi3'
libavcodec.so: errorlibavcodec/: libavcodec.so: error: undefined reference to '__powidf2'
avconv.c:1434: error: undefined referenceundefined reference to '__powidf2 to '
'__divdi3'
avconv.c:1441: error: undefined reference to '__divdi3'
avconv.c:1434: error: undefined reference to '__divdi3'
avconv.c:1441: error: undefined reference to '__divdi3'
collect2: error: ld returned 1 exit status
collect2: error: ld returned 1 exit status
make: *** [avprobe] Error 1
make: *** Waiting for unfinished jobs....
make: *** [avconv] Error 1

Answer 1

You aren't specifying any --cross-prefix or --cc, which means that it will use your host system compiler (OS X) for compiling for android - this only actually fails when it tries to link to the android libs.

To actually make this work as intended, add --cross-prefix=x86_64-linux-android- to your configure line. (I assume you did something such to make it work for the other architectures as well.)

Edit: I misread, and you actually do supply --cross-prefix just fine.

Remove all of your --extra-cflags and --extra-ldflags - they are redundant and conflicting. If you have a concrete need or case for any particular of them, then you may reconsider adding some of the individual flags, but most of them are just redundant. In this case, the -L option that points to your sysroot's lib directory seems to be causing your issues - setting this via --sysroot already is enough and the -L and -Wl,-rpath-link are just redundant.

In general, don't blindly add large hordes of options - more isn't better when it comes to compiler options. Only add the ones you concretely understand and know you need.

If you use --target-os=android, you don't need --disable-symver - that option was only needed before android was added as a separate value for --target-os.