I am hitting exactly this problem:
https://www.postgresql.org/message-id/flat/17943-56bb8c6bd4409b9f%40postgresql.org
ERROR: could not load library "/usr/pgsql-16/lib/llvmjit.so": /usr/pgsql-16/lib/llvmjit.so: undefined symbol:
LLVMBuildGEP
I have PostgreSQL 16beta2 installed, the exact package list is
postgresql16-libs-16-beta2_1PGDG.f38.x86_64
postgresql16-16-beta2_1PGDG.f38.x86_64
postgresql16-server-16-beta2_1PGDG.f38.x86_64
postgresql16-contrib-16-beta2_1PGDG.f38.x86_64
postgresql16-plpython3-16-beta2_1PGDG.f38.x86_64
postgresql16-devel-16-beta2_1PGDG.f38.x86_64
postgresql16-llvmjit-16-beta2_1PGDG.f38.x86_64
llvm-libs-16.0.6-1.fc38.x86_64
Yours,
Laurenz Albe