Build 7-zip cli for android

This project is based on 7-Zip 23.01 (2023-06-20) version. I add a build script and modify some code to make the command line tool can run on android. You can directly download the .so files or follow next steps to build your own lib.

UnRAR has its own license, please pay attention. If you don't need unRAR, follow Doc/readme.txt to disable it.

Build Your Own Lib

Please see the 7-Zip's DOC/readme.txt at first.

Modify make script

Add the following at top of CPP/7zip/Bundles/Alone2/makefile.gcc. That's because shared library will only be generated if DEF_FILE is defined.

DEF_FILE = 7zz # the name is free to set

You can also add other vars like:

DISABLE_RAR_COMPRESS = 1

Delete all -Werror in CPP/7zip/7zip_gcc.mak.

At CPP/7zip/7zip_gcc.mak:152, delete -lpthread because Cannot find -lpthread (google.com). After, it's like:

LIB2 = -ldl

At bottom of CPP/7zip/7zip_gcc.mak, add this:

android-install:
	install $(O)/$(PROG)$(SHARED_EXT) $(Output)

Write build script

Add build script at project root path.

NDK=/Users/peijunbo/Library/Android/sdk/ndk/25.2.9519653

# Only choose one of these, depending on your build machine...
export TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/darwin-x86_64
# export TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/linux-x86_64

# Only choose one of these, depending on your device...
export TARGET=aarch64-linux-android
# export TARGET=armv7a-linux-androideabi
# export TARGET=i686-linux-android
# export TARGET=x86_64-linux-android
export API=21
arch=arm64-v8a
# arch=armeabi-v7a
# arch=x86
# arch=x86-64
export Output=$(pwd)/output/$arch
mkdir -p $Output
export CC=$TOOLCHAIN/bin/$TARGET$API-clang
export CXX=$TOOLCHAIN/bin/$TARGET$API-clang++
export LD=$TOOLCHAIN/bin/ld

# refers to https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260329#c13
if [ "$TARGET" == "aarch64-linux-android" ]; then
    export MY_ARCH="-march=armv8-a+crc+crypto"
fi
cd CPP/7zip/Bundles/Alone2
make -j -f makefile.gcc clean
make -j -f makefile.gcc
make -j -f makefile.gcc android-install

After all, run your build script and the output files are in Output path

Use in Android

In your c++ code, use Main2(int argc, char *argv[]) function to call 7-zip cli tool.