I'm used port for bir2 installation. Installation successfully completed and using without any problem on freebsd 13.2.
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Ömür yavuz

10 Kasım 2023 11:49, "Marek Zarychta" <zarychtam@plan-b.pwste.edu.pl> yazdı:
W dniu 10.11.2023 o 09:05, David S. pisze: 
Step to reproduce the issue:
1. Download Bird-2.14 from
https://bird.network.cz/download/bird-2.14.tar.gz
2. tar -zxvf bird-2.14.tar.gz
3. cd bird-2.14
4. ./configure
5. gmake

Please try to build with the help of the ports tree[1].

BIRD 2.14 is available as net/bird2.

[1] https://docs.freebsd.org/en/books/handbook/ports/#ports-using

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Marek Zarychta