7z libraries for C/C++

For C and C++ there are 3 good choices:

• libarchive reads and writes 7z with the same streaming API it uses for TAR, ZIP, CPIO and ISO. It’s on every Linux distribution and in macOS and Windows (tar.exe). It can’t decrypt or create encrypted 7z archives.
• LZMA SDK is the public-domain code by the author of 7-Zip. Its C part has a small 7z decoder (7zArcIn.c, 7zDec.c) with no dependencies, good for embedded use and installers. It reads LZMA, LZMA2, PPMd and BCJ/BCJ2 archives but not encrypted ones, and it doesn’t write 7z.
• bit7z is a C++ wrapper of the 7-Zip shared library (7z.dll, 7z.so). It supports everything 7-Zip does: encryption, header encryption, all compression methods, multi-volume archives. You ship the 7-Zip library with your program.

Pick libarchive when you handle several archive formats and don’t need encryption; the LZMA SDK for a small, dependency-free extractor; bit7z when you need full 7-Zip features on Windows, Linux or macOS.

The full 7-Zip source code (C++, LGPL with an unRAR restriction for the RAR decoder) is at github.com/ip7z/7zip if you want to build a 7z encoder into your program directly.

• bit7z bit7z is a C++ wrapper of the 7-Zip shared library for reading and writing 7z archives. How to install it, extract, list, create encrypted 7z archives.
• libarchive libarchive reads and writes 7z archives in C and C++. How to install it, list and extract a 7z file, create a 7z archive with LZMA2.
• LZMA SDK The LZMA SDK is the public-domain reference code from the author of 7-Zip. How to build its C 7z decoder, list a 7z archive and extract files to memory.