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DuckDB Debian Source Package
============================
Bundled third-party libraries
------------------------------
The following have been replaced with system libraries:
- zstd + xxhash (USE_SYSTEM_ZSTD=TRUE)
- ICU (WITH_INTERNAL_ICU=FALSE)
The bundled ICU 66.1 contains a copy of double-conversion whose
architecture detection table lacks several ports (loong64, etc.),
causing build failures on those architectures. System ICU is currently ICU 78.3
C++ standard
------------
The build uses -DCMAKE_CXX_STANDARD=17 even though upstream defaults to
C++11. This is required because system ICU 75+ headers use C++17 features.
Known test failure with system ICU
------------------------------------
Results (BUILD_UNITTESTS=TRUE) with system ICU on amd64 (1.5.1-3):
./test/unittest
test cases: 4404 | 4403 passed | 1 failed | 51 skipped
assertions: 976771 | 976770 passed | 1 failed | 51 skipped
test/sql/timezone/test_icu_calendar.test:81
Mismatch on 1868-09-08: era=231 (Keiou 4) vs expected era=232 (Meiji 1)
The test was written against bundled ICU 66.1. System ICU 78.3 uses
updated historical calendar data for the Meiji era start date.
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