为Android x86_64编译libav

Question

我试图为所有体系结构（包括64位）编译lib。 我创建的脚本适用于armeabi，armeabi-v7a，arm64-v8a和x86。 它失败了mips，并可能会失败的mips64以及，但我不关心他们;它是次要的，我有主要问题：我关心x86_64，这个不会编译。

编辑：x86也失败了。在帖子结尾编译错误日志。

下面是该脚本：

1. 创建一个独立的工具链：就像一个魅力
2. 使用该工具链配置的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

这似乎配置好，config.log不会引发任何错误，除了下面的警告（无论如何我都会得到这个警告）：

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

1. compile：make -j 8.我得到.so文件正确生成，但如果我仔细看看日志，我会在最后得到错误（对不起，吨粘贴整个日志，它是长）：

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

错误编译86，与配置后：的./configure --arch = 86 --cpu = 86 --cross前缀= /一些/ 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 -fast-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

您没有指定任何--cross-prefix或--cc，这意味着它会使用你的主机系统的编译器（OS X）编译为Android - 这个时候，它会连接到Android库实际上只失败。

要实际按预期工作，请在配置行中添加--cross-prefix=x86_64-linux-android-。 （我假设你做了这样的事情，以使其适用于其他体系结构。）

编辑：我误读了，你实际上提供--cross-prefix就好。

删除所有的--extra-cflags和--extra-ldflags - 它们是多余的和冲突的。如果你对他们有任何具体的需求或情况，那么你可能会重新考虑添加一些单独的标志，但其中大多数都是多余的。在这种情况下，指向你的sysroot的lib目录的-L选项似乎会导致你的问题 - 通过--sysroot已经足够了，-L和-Wl,-rpath-link只是多余的。

一般来说，不要盲目添加大量的选项 - 当涉及到编译器选项时，不会更好。只添加你具体理解并知道你需要的那些。

如果您使用--target-os=android，则不需要--disable-symver - 只有在android被添加为--target-os的单独值之前，才需要该选项。