Comments (4)
It looks like the problem is that for a couple weeks in the llvm-project development branch, arm64 crc intrinsics did not work unless crc support was enabled in the whole file, and Apple happened to fork LLVM during that time and release it starting sometime in the Xcode 15 series. (It's after llvm/llvm-project@b2d7a0d but before llvm/llvm-project@30b67c6.)
The "fix" is likely going to be to disable the use of crc instructions on those versions of Xcode, which will make it compile but will reduce CRC-32 performance. It may be a good idea to use a different version of Xcode so that your build of libdeflate can use these instructions. Note that this problem will go away in future versions of Xcode due to the incorporation of llvm/llvm-project@30b67c6, so it's likely just going to be a few versions in the 15.x series that will be affected.
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Thanks for the detailed information! The projects where we need to do these compiles don't have a hard dependency on Xcode versions above 15.0.1, so we can stick with that version for now.
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3b766cd fixed this by using a fallback to inline assembly. You should be able to use the latest Xcode now. I don't have a way to easily test different Xcode versions, so let me know if it still doesn't work for some reason. Thanks!
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@ebiggers , I can confirm this issues has been solved in 3b766cd for Xcode 15.3 (I haven't tested 15.1. or 15.2).
Much appreciated!
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Related Issues (20)
- Build type does not default to Release with CMake 3.10 and earlier HOT 5
- Version `1.8` is able to decompress data that version `1.17` cannot, but only on Windows HOT 9
- Comparison to zlib and its forks HOT 2
- POSITION_INDEPENDENT_CODE ON for static compilations HOT 2
- v1.14 - v1.18 deflate compatibility HOT 5
- Decompressing Microsoft DOCX Files in Unreal Engine 5 with Libdeflate HOT 4
- Windows Explorer cannot unpack some files generated with libdeflate (reward offered) HOT 9
- Tests fail on Windows in Release mode with VS platform toolset v141 HOT 1
- Please also generate a static source code archive for release HOT 2
- Libdeflate compressed stream in kunzip fail to decompress HOT 12
- Slow level 0 "compression" HOT 2
- I added stream & multi-thread support for libdeflate HOT 16
- ESA matchfinder HOT 4
- crc32 is twice as fast in zlib-ng HOT 19
- how to change sliding window size at runtime? HOT 1
- analyzer warning regression: The left operand of '+' is a garbage value due to array index out of bounds HOT 1
- Unaligned access on PowerPC: forgotten macros in `common_defs.h` HOT 11
- 32-bit build error when using cctools 949.0.1 with assembler that doesn't support AVX instructions HOT 7
- VNNI support seems to require something later than GCC 11.1 HOT 3
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