Section 6 of the LGPL v2.1 specifically permits static linking with the library. If your project is not open source, this section does require that you make your object files available to your users. The intent, as indicated in the license, is that a user who has obtained your software may exercise their right to modify the library and then re-link their modified version into your application.

We recommend that you apply Subsection 6c, which only requires that you make a written offer to provide the object files. Now...if you consider the actual utility of this mechanism - that it is only applicable to developers, and only those with in depth knowledge of the tools, the time required for development - all to have a new barcode reader in a specific version of your application that only they can use, the reality is that no one is going to request this. You probably should not even waste time preparing for it until a request is made.

Additionally, to avoid “casual requests” from nefarious types that just want to inconvenience you, also consider charging a fee for the distribution of this material (as permitted by the license); just add up the cost of burning and shipping a disk. If this cost is “large” compared to the price of your app, the likelyhood of a request is reduced even further.