felipecrv opened a new issue, #40635:
URL: https://github.com/apache/arrow/issues/40635
### Describe the bug, including details regarding any error messages,
version, and platform.
I configured a release build on macOS with the following shell script:
```sh
#!/bin/sh
cmake -G Ninja $1 \
-DCMAKE_BUILD_TYPE="Release" \
-DARROW_BUILD_BENCHMARKS=ON \
-DARROW_BUILD_STATIC=ON \
-DARROW_BUILD_SHARED=ON \
-DARROW_BUILD_TESTS=ON \
-DARROW_ENABLE_TIMING_TESTS=ON \
-DARROW_ACERO=ON \
-DARROW_AZURE=ON \
-DARROW_COMPUTE=ON \
-DARROW_DATASET=ON \
-DARROW_FILESYSTEM=ON \
-DARROW_GCS=OFF \
-DARROW_IPC=ON \
-DARROW_JEMALLOC=ON \
-DARROW_JSON=ON \
-DARROW_PARQUET=ON \
-DARROW_TESTING=ON \
-DARROW_BENCHMARKS=ON
```
Building a specific target with `ninja -v` I see both `-O2` and `-O3` flags
```sh
ninja -v
./src/arrow/CMakeFiles/arrow_compute.dir/compute/kernels/vector_selection_take_internal.cc.o
[1/1] /opt/homebrew/bin/ccache
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
-DARROW_HAVE_NEON -DARROW_WITH_TIMING_TESTS
-I/Users/felipe/code/arrow/cpp/release/src -I/Users/felipe/code/arrow/cpp/src
-I/Users/felipe/code/arrow/cpp/src/generated -isystem /opt/homebrew/include
-fno-aligned-new -Qunused-arguments -fcolor-diagnostics -Wall
-Wno-unknown-warning-option -Wno-pas
s-failed -march=armv8-a -O3 -DNDEBUG -O2 -std=c++17 -arch arm64 -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.3.sdk
-fPIC -MD -MT
src/arrow/CMakeFiles/arrow_compute.dir/compute/kernels/vector_selection_take_internal.cc.o
-MF
src/arrow/CMakeFiles/arrow_compute.dir/compute/kernels/vector_selection_take_internal.cc.o.d
-o src/arrow/CMakeFiles/arrow_compute.dir/c
ompute/kernels/vector_selection_take_internal.cc.o -c
/Users/felipe/code/arrow/cpp/src/arrow/compute/kernels/vector_selection_take_internal.cc
```
When both `-O2` and `-O3` are passed, `clang` picks the higher level of
optimization — `-O3`. But is that really the intention of the build given that
`-O2` is also being passed?
### Component(s)
C++
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