Openssl for Android x86_64 and mips64

Question

I have built openssl for 5/7 of the android-21 (android-L) architectures: armeabi, armeabi-v7a, arm64, mips, x86. However I am unable to build it for x86_64 and mips64.

What I'm doing...

x86 - working

The following is my working script for x86, using a toolchain created by make-standalone-toolchain:

export ANDROID_NDK_ROOT=/Users/jacsteve/dev/android/ndk
export ANDROID_API=android-21
export ANDROID_ARCH=arch-x86
export ANDROID_EABI=i686-linux-android-4.9
export ANDROID_SYSROOT=$ANDROID_NDK_ROOT/platforms/$ANDROID_API/arch-x86
export ANDROID_TOOLCHAIN=/tmp/toolchain/x86
export ANDROID_DEV=$ANDROID_SYSROOT/usr

export SYSTEM=android
export ARCH=x86

export CROSS_COMPILE=i686-linux-android-

export CFLAGS="--sysroot=$ANDROID_SYSROOT"
export CPPFLAGS="--sysroot=$ANDROID_SYSROOT"
export CXXFLAGS="--sysroot=$ANDROID_SYSROOT"

./Configure android-x86 shared no-asm -no-ssl2 -no-ssl3 -no-comp -no-hw --cross-compile-prefix=$CROSS_COMPILE --openssldir=/tmp/ssl/x86

make depend
make
make install

This works fine, and leaves me with libssl.so and libcrypto.so in /tmp/ssl/x86

x86_64 - fails

However, x86_64 fails. Here's the script:

export ANDROID_NDK_ROOT=/Users/jacsteve/dev/android/ndk
export ANDROID_API=android-21
export ANDROID_ARCH=arch-x86_64
export ANDROID_EABI=x86_64-linux-android-4.9
export ANDROID_SYSROOT=$ANDROID_NDK_ROOT/platforms/$ANDROID_API/arch-x86_64
export ANDROID_TOOLCHAIN=/tmp/toolchain/x86_64
export ANDROID_DEV=$ANDROID_SYSROOT/usr

export SYSTEM=android
export ARCH=x86_64

export CROSS_COMPILE=x86_64-linux-android-

export CFLAGS="--sysroot=$ANDROID_SYSROOT"
export CPPFLAGS="--sysroot=$ANDROID_SYSROOT"
export CXXFLAGS="--sysroot=$ANDROID_SYSROOT"

./Configure android-x86 shared no-asm -m64 -no-ssl2 -no-ssl3 -no-comp -no-hw --cross-compile-prefix=$CROSS_COMPILE --openssldir=/tmp/ssl/x86_64

make depend
make
make install

The Errors...

x86_64

I get a load of error messages from the make call that look like this:

/private/tmp/toolchain/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld:
error: libcrypto.a(cryptlib.o): incompatible target
/private/tmp/toolchain/x86_64/bin/../lib/gcc/x86_64-linux-android/4.9/../../../../x86_64-linux-android/bin/ld:
error: libcrypto.a(mem.o): incompatible target
...
collect2: error: ld returned 1 exit status

It looks to me like x86_64-linux-android-gcc is compiling everything fine, but when we get to the linking stage, x86_64-linux-android-ld can't read the compiled object files.

mips64

Using a similar setup for mips64 (with ./Configure android-mips ... ) I get the following error, which looks to be a similar issue to do with mips64-linux-android-ld being unable to read object files:

/Users/jacsteve/dev/android/ndk/platforms/android-21/arch-mips64/usr/lib/libdl.so: error adding symbols: File in wrong format
collect2: error: ld returned 1 exit status

Does anyone know how to build the x86_64 and mips64 architectures successfully?

Answer 1

Solved!

Instead of

./Configure android-x86 ...

I used

./Configure linux-generic64 ...

I also used linux-generic32 for the 32bit architectures.

Answer 2

在./Configure之前运行make clean为我解决了这个问题。

Answer 3

The error from building openssl for mips64, I guess, resulted from the incompatible ABI format between objects and libraries, which the format objects is mips-ELF64, while libraries provided by ANDROID_NDK is mips ELF32

cd ${ANDROID_NDK_HOME}/platforms/android-24/arch-mips64/usr/lib
readelf -h libc.so
  ELF Header:
  Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 
  Class:                             ELF32
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              DYN (Shared object file)
  Machine:                           MIPS R3000
  Version:                           0x1
  Entry point address:               0xa7d0
  Start of program headers:          52 (bytes into file)
  Start of section headers:          204792 (bytes into file)
  Flags:                             0x50001007, noreorder, pic, cpic, o32, mips32
  Size of this header:               52 (bytes)
  Size of program headers:           32 (bytes)
  Number of program headers:         6
  Size of section headers:           40 (bytes)
  Number of section headers:         18
  Section header string table index: 15