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# Third-party Dependencies

The release library is built with the following third-party components. Some
components are linked into the produced IoTDB C++ session library; this file is
included for provenance.

| Component | Version | License |
| --- | --- | --- |
| Apache Thrift | 0.21.0 | Apache License 2.0 |
| Boost | 1.60.0 on Linux/Windows, 1.84.0 on macOS by default | Boost Software License 1.0 |
| OpenSSL | 3.5.0 when `WITH_SSL=ON` | Apache License 2.0 |
| GNU m4 | 1.4.19 on Linux build bootstrap | GPL-3.0-or-later |
| GNU flex | 2.6.4 on Linux build bootstrap | BSD-style flex license |
| GNU bison | 3.8 on Linux build bootstrap | GPL-3.0-or-later |
