Issue
I am trying to cross compile FFmpeg for Android with NDK r16b I have manged to compile without any issues for all platforms but x86_64.
Here is my compile script
#!/bin/bash
function build_one
{
./configure \
--prefix=$PREFIX \
--enable-shared \
--disable-static \
--enable-pic \
--enable-small \
--disable-programs \
--disable-symver \
--target-os=android \
--enable-cross-compile \
--cross-prefix=$CROSS_PREFIX \
--extra-cflags="-Os -fpic $ADDI_CFLAGS" \
--extra-ldflags="$ADDI_LDFLAGS" \
--sysroot=$TOOLCHAIN/sysroot $ADDITIONAL_CONFIG_FLAG \
--disable-all --disable-autodetect --disable-network --enable-pthreads \
--enable-protocol=file --enable-protocol=pipe --enable-protocol=concat \
--disable-all --disable-autodetect --disable-network --enable-pthreads \
--enable-avcodec --enable-avformat --enable-swresample --enable-avfilter --enable-filter=aresample \
--enable-parser=aac --enable-parser=aac_latm --enable-parser=flac --enable-parser=mpegaudio --enable-parser=vorbis \
--enable-muxer=mp3,wav --enable-encoder=pcm*,libmp3lame --enable-nonfree --enable-gpl \
--enable-jni --enable-mediacodec --enable-libmp3lame
make -j4
make install
make distclean
}
HOME_PATH=/home/nll/Desktop
CPU=x86_64
TOOLCHAIN=$HOME_PATH/my_toolchains/x86_64
CROSS_PREFIX=$TOOLCHAIN/bin/x86_64-linux-android-
mkdir -p $(pwd)/android/$CPU
PREFIX=$(pwd)/android/$CPU
ADDI_CFLAGS="-march=x86-64 -I$INCLUDE_PATH"
ADDI_LDFLAGS="-shared -L$LIBS_PATH"
ADDITIONAL_CONFIG_FLAG="--arch=x86_64 --enable-x86asm"
build_one
Above script fails with
WARNING: /home/nll/Desktop/my_toolchains/x86_64/bin/x86_64-linux-android-pkg-config not found, library detection may fail.
mktemp -u XXXXXX
5ZpQya
test_ld cc
test_cc
BEGIN /tmp/ffconf.KWqViHoN/test.c
1 int main(void){ return 0; }
END /tmp/ffconf.KWqViHoN/test.c
/home/nll/Desktop/my_toolchains/x86_64/bin/x86_64-linux-android-gcc --sysroot=/home/nll/Desktop/my_toolchains/x86_64/sysroot -Os -fpic -march=x86-64 -I -c -o /tmp/ffconf.KWqViHoN/test.o /tmp/ffconf.KWqViHoN/test.c
/home/nll/Desktop/my_toolchains/x86_64/bin/x86_64-linux-android-gcc -shared -L --sysroot=/home/nll/Desktop/my_toolchains/x86_64/sysroot -o /tmp/ffconf.KWqViHoN/test /tmp/ffconf.KWqViHoN/test.o
/home/nll/Desktop/my_toolchains/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9.x/../../../../x86_64-linux-android/bin/ld: error: /tmp/ffconf.KWqViHoN/test.o: unsupported ELF file type 2
collect2: error: ld returned 1 exit status
C compiler test failed.
So, error is "unsupported ELF file type 2" which means 64 bit. But, I am trying to build 64 bit library anyway.
I do not understand what is the issue here. Can anyone give me some direction?
Solution
The first command line contains -I -c
. This means that the directory -c
is added to the include path, and the command performs a complete link, not just compilation and assembly. The result is an executable, which is an ET_EXEC
object (type 2), hence the final error message. (This has got nothing to do with 64-bit binaries.)
Something went wrong with setting the include path.
Answered By - Florian Weimer
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