[C++] error: implicit conversion loses integer precision: 'size_t' (aka 'unsigned long') to 'const int' ....

[ghost]

Describe the bug, including details regarding any error messages, version, and platform.

New to al lthe stuff compiling.
Running FreeBSD 13.2-RELEASE-p1 trying to install pyarrow and i was following https://arrow.apache.org/docs/developers/python.html#using-system-and-bundled-dependencies .
on the step of make -j4 encountered this error.
Tried just to use "make" same problem , tried "make clean && make" same issue.

[20%] Building CXX object src/arrow/CMakeFiles/arrow_objlib.dir/util/logging.cc.o
`/home/evo/arrow/src/arrow/util/logging.cc:97:23: **error:** implicit conversion loses integer precision: 'size_t' (aka 'unsigned long') to 'const int' [-Werror,-Wshorten-64-to-32]
    const int calls = backtrace(buffer, static_cast<int>(sizeof(buffer) / sizeof(void*)));
1 error generated.
*** Error code1
Stop.
make[2]: stopped in /usr/home/evo/arrow/cpp/build
*** Error code 1

As im no C guy, checked actuall file which turs to my error:

void* buffer[255];
  const int calls = backtrace(buffer, static_cast<int>(sizeof(buffer) / sizeof(void*)));
backtrace_symbol_fd(buffer,calls, 1);

Component(s)

C++, Python

[js8544]

Since you are building manually, I assume you can change the source code. Can you update the line to

const int calls = static_cast<int>(backtrace(buffer, static_cast<int>(sizeof(buffer) / sizeof(void*))));

and then try again?

[ghost]

Thank You !
Worked like a charm !

[ghost]

Ver ystrange, can it be that pyarrow was not instaleld correctly ? it states:

ImportError while loading conftest '/usr/home/evo/arrow/python/pyarrow/conftest.py'.
pyarrow/__init__.py:65: in <module>
    import pyarrow.lib as _lib
E   ImportError: Shared object "libarrow_dataset.so.1400" not found, required by "lib.cpython-39.so"