Hi @huangteng , tvm.build_config had been replaced with PassContext. Check these PRs.
tvm.build_config
PassContext
[REFACTOR][RELAY] Replace build_config with PassContext (#5698) · apache/tvm@c55ed37 (github.com)
[REFACTOR][TIR][API-Change] Migrate BuildConfig to PassContext. (#5668) · apache/tvm@b264026 (github.com)