No
GNU GPL v2.0 or later is strong copyleft; combining it into a GNU Lesser GPL v2.1 project would force the combined work to be GNU GPL v2.0 or later (not GNU Lesser GPL v2.1). If your project must remain GNU Lesser GPL v2.1, avoid GNU GPL v2.0 or later code.
| License | Family | Patent grant |
|---|---|---|
| GNU GPL v2.0 or later (GPL-2.0-or-later) | strong-copyleft | No (implicit at most) |
| GNU Lesser GPL v2.1 (LGPL-2.1) | weak-copyleft | No (implicit at most) |
GNU GPL v2.0 or later: GPL-2.0 with explicit upgrade path; users may pick GPL-2.0 or any later GPL.
GNU Lesser GPL v2.1: Library copyleft: dynamic linking permitted from non-LGPL code without triggering full copyleft.
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