arrow-cpp v22.0.0

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[conda-forge-admin]

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I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

I do have some suggestions for making it better though...

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[h-vetinari]

Same as in #1664:

[87/1004] Building CXX object src/arrow/CMakeFiles/arrow_util.dir/util/byte_stream_split_internal.cc.o
FAILED: [code=1] src/arrow/CMakeFiles/arrow_util.dir/util/byte_stream_split_internal.cc.o 
$BUILD_PREFIX/bin/x86_64-conda-linux-gnu-c++ -DARROW_HAVE_RUNTIME_AVX2 -DARROW_HAVE_RUNTIME_AVX512 -DARROW_HAVE_RUNTIME_BMI2 -DARROW_HAVE_RUNTIME_SSE4_2 -DGFLAGS_IS_A_DLL=0 -DGLOG_USE_GFLAGS -DGLOG_USE_GLOG_EXPORT -DOPENTELEMETRY_ABI_VERSION_NO=1 -DPROTOBUF_USE_DLLS -DURI_STATIC_BUILD -I$SRC_DIR/cpp/build/src -I$SRC_DIR/cpp/src -I$SRC_DIR/cpp/src/generated -Wno-noexcept-type -Wno-self-move -fvisibility-inlines-hidden -fmessage-length=0 -march=nocona -mtune=haswell -ftree-vectorize -fPIC -fstack-protector-strong -fno-plt -O2 -ffunction-sections -pipe -isystem $PREFIX/include -fdebug-prefix-map=$SRC_DIR=/usr/local/src/conda/apache-arrow-22.0.0 -fdebug-prefix-map=$PREFIX=/usr/local/src/conda-prefix -fdiagnostics-color=always -fuse-ld=gold  -Wall -fno-semantic-interposition -fvisibility-inlines-hidden -fmessage-length=0 -march=nocona -mtune=haswell -ftree-vectorize -fPIC -fstack-protector-strong -fno-plt -O2 -ffunction-sections -pipe -isystem $PREFIX/include -fdebug-prefix-map=$SRC_DIR=/usr/local/src/conda/apache-arrow-22.0.0 -fdebug-prefix-map=$PREFIX=/usr/local/src/conda-prefix -O3 -DNDEBUG -O2 -ftree-vectorize  -std=c++17 -flto=auto -fno-fat-lto-objects -fPIC -pthread -MD -MT src/arrow/CMakeFiles/arrow_util.dir/util/byte_stream_split_internal.cc.o -MF src/arrow/CMakeFiles/arrow_util.dir/util/byte_stream_split_internal.cc.o.d -o src/arrow/CMakeFiles/arrow_util.dir/util/byte_stream_split_internal.cc.o -c $SRC_DIR/cpp/src/arrow/util/byte_stream_split_internal.cc
$SRC_DIR/cpp/src/arrow/util/byte_stream_split_internal.cc: In static member function 'static constexpr auto arrow::util::internal::ByteStreamSplitDecodeDynamic<kNumStreams>::implementations()':
$SRC_DIR/cpp/src/arrow/util/byte_stream_split_internal.cc:55:16: error: 'ByteStreamSplitDecodeSimd' was not declared in this scope; did you mean 'ByteStreamSplitDecode'?
   55 |               &ByteStreamSplitDecodeSimd<xsimd::avx2, kNumStreams>,
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~
      |                ByteStreamSplitDecode
$SRC_DIR/cpp/src/arrow/util/byte_stream_split_internal.cc:55:42: error: 'xsimd' was not declared in this scope
   55 |               &ByteStreamSplitDecodeSimd<xsimd::avx2, kNumStreams>,
      |                                          ^~~~~

No idea why xsimd doesn't get found anymore, it's definitely present in $PREFIX:

arrow-cpp-feedstock/recipe/meta.yaml

Line 95 in 7f0f076

- xsimd

CC @raulcd @pitrou @kou @jorisvandenbossche

[pitrou]

--   ARROW_SIMD_LEVEL=NONE [default=DEFAULT|NONE|SSE4_2|AVX2|AVX512|NEON|SVE|SVE128|SVE256|SVE512]
--       Compile-time SIMD optimization level
--   ARROW_RUNTIME_SIMD_LEVEL=MAX [default=MAX|NONE|SSE4_2|AVX2|AVX512]
--       Max runtime SIMD optimization level

Trying leaving ARROW_SIMD_LEVEL to its default instead of NONE?
(if that's the problem, probably a bug worth fixing on the Arrow side as well)

[raulcd]

We seem to require AVX2 unconditionally for that file but the -march=nocona flag present on compilation means that this processor doesn't support AVX2, right?
https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html

The ARROW_RUNTIME_SIMD_LEVEL shouldn't be MAX on that case?

cc @AntoinePrv FYI

[h-vetinari]

Sounds like a bug to me if

arrow-cpp-feedstock/recipe/build.sh

Line 93 in 7f0f076

-DARROW_SIMD_LEVEL=NONE \

causes anything higher than the absolutely lowest baseline in terms of necessary CPU features.

[raulcd]

Yes, seems like a bug to me if the file requires AVX2 at compile time shouldn't only use the append_runtime_avx2_src macro but should also check ARROW_SIMD_LEVEL as the append_runtime_avx2_src macro only validates the ARROW_RUNTIME_SIMD_LEVEL flag.

[AntoinePrv]

This might be a slightly different issue from apache/arrow#47946

Here we have ARROW_RUNTIME_SIMD_LEVEL=MAX.
The error is in byte_stream_split_internal.cc whereas in the Apache issue it's in byte_stream_split_internal_avx2.cc.
Here I believe the issue is that I use xsimd::avx2 as the dispatch enum when (I beleive) xsimd is not present in files with ARROW_SIMD_LEVEL=NONE

[pitrou]

I think it's the exact same issue. ARROW_RUNTIME_SIMD_LEVEL selects dynamically-dispatched SIMD code paths. ARROW_SIMD_LEVEL selects unconditional SIMD code paths. So if ARROW_RUNTIME_SIMD_LEVEL is non-none, then xsimd must be included.

[AntoinePrv]

@conda-forge/arrow-cpp Anyone feels like trying this patch here:

From b66e127fe2278b3c28a9281a4ac2e18b6383e6da Mon Sep 17 00:00:00 2001
From: AntoinePrv <[email protected]>
Date: Mon, 27 Oct 2025 10:25:58 +0100
Subject: [PATCH] Change xsimd inclusion criterion

---
 cpp/src/arrow/util/byte_stream_split_internal.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cpp/src/arrow/util/byte_stream_split_internal.h b/cpp/src/arrow/util/byte_stream_split_internal.h
index 70f9b87d6c..1ba2d5335b 100644
--- a/cpp/src/arrow/util/byte_stream_split_internal.h
+++ b/cpp/src/arrow/util/byte_stream_split_internal.h
@@ -29,7 +29,9 @@
 #include <cstdint>
 #include <cstring>
 
-#if defined(ARROW_HAVE_NEON) || defined(ARROW_HAVE_SSE4_2)
+// ARROW_HAVE_RUNTIME_SSE4_2 is used on x86-64 to include ARROW_HAVE_SSE4_2 and
+// ARROW_RUNTIME_SIMD_LEVEL != NONE.
+#if defined(ARROW_HAVE_NEON) || defined(ARROW_HAVE_RUNTIME_SSE4_2)
 #  include <xsimd/xsimd.hpp>
 #  define ARROW_HAVE_SIMD_SPLIT
 #endif
-- 
2.51.0

[h-vetinari]

Thanks @AntoinePrv, that seems to have fixed things! 🥳

There's one last problem on osx-64 though - I don't know why it picks up the wrong compiler during the testing phase. It runs immediately after the main CMake build, and we haven't reconfigured anything, much less the compilers

 90/104 Test  #90: parquet-internals-test .......................***Failed    2.83 sec
Running parquet-internals-test, redirecting output into $SRC_DIR/cpp/build/build/test-logs/parquet-internals-test.txt (attempt 1/1)
2025-10-27 11:51:03.510 xcodebuild[39157:363001] [MT] DVTSDK: Skipped SDK /Applications/Xcode_16.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk; its version (11.0) is below required minimum (14.0) for the macosx platform.
2025-10-27 11:51:04.160 xcodebuild[39157:363001] Writing error result bundle to /var/folders/5k/fq5ptf2906bgfn1krb78bmj00000gn/T/ResultBundle_2025-27-10_11-51-0004.xcresult
xcodebuild: error: SDK "/Applications/Xcode_16.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk" cannot be located.
c++filt: error: sh -c '/Applications/Xcode_16.4.app/Contents/Developer/usr/bin/xcodebuild -sdk /Applications/Xcode_16.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk -find c++filt 2> /dev/null' failed with exit code 16384: (null) (errno=No such file or directory)
xcode-select: Failed to locate 'c++filt', requesting installation of command line developer tools.
~/miniforge3/conda-bld/apache-arrow_1761560552077/work/cpp/build/src/parquet

[pitrou]

@h-vetinari I don't know, but this is the part that tries to extract a traceback after a test crashed.

Edit: well, more precisely, it processes a log file with c++filt just in case there are symbols that deserve demangling there :-) So not necessarily indicative of a crash, just a non-empty log file.

[pitrou]

Ha so this may be the same failure we see in the Arrow PR
apache/arrow#47952

No, it's unrelated.

[raulcd]

CI seems good now

[h-vetinari]

Thanks for the help on this! 🙏