Tangruilin commented on issue #240:
URL: https://github.com/apache/iceberg-cpp/issues/240#issuecomment-3315538198

   > I download CRoaring and build with the following commands:
   > 
   > ```
   > cmake -S . -B build -DENABLE_ROARING_MICROBENCHMARKS=ON 
-DHAVE_PTHREAD_AFFINITY=OFF
   > cmake --build build
   > ```
   > 
   > I got the same error:
   > 
   > ```
   > /Users/zjw/zjw/CRoaring/build/_deps/benchmark-src/src/sysinfo.cc:618:3: 
error: unknown type name 'cpu_set_t'
   >   618 |   cpu_set_t previous_affinity;
   >       |   ^
   > /Users/zjw/zjw/CRoaring/build/_deps/benchmark-src/src/sysinfo.cc:589:5: 
error: unknown type name 'cpu_set_t'
   >   589 |     cpu_set_t affinity;
   >       |     ^
   > /Users/zjw/zjw/CRoaring/build/_deps/benchmark-src/src/sysinfo.cc:594:25: 
error: use of undeclared identifier 'CPU_SETSIZE'
   >   594 |     for (int i = 0; i < CPU_SETSIZE; ++i)
   >       |                         ^
   > /Users/zjw/zjw/CRoaring/build/_deps/benchmark-src/src/sysinfo.cc:618:13: 
warning: private field 'previous_affinity' is not used [-Wunused-private-field]
   >   618 |   cpu_set_t previous_affinity;
   >       |             ^
   > ```
   > 
   > It seems pointless to run these tests and benchmarks within iceberg-cpp. I 
disable them in [#241](https://github.com/apache/iceberg-cpp/pull/241), can you 
give it a try?
   
   cpu_set_t is not support on MacOS, it is only supported on Linux.
   Then I found the flag `HAVE_PTHREAD_AFFINITY=off` is not useful, you can 
manually comment out the CPU affinity settings to  solve this problem.
   like below:
   ```Cmake
   # pthread affinity, if available
   if(HAVE_PTHREAD_AFFINITY)
     #target_compile_definitions(benchmark PRIVATE 
-DBENCHMARK_HAS_PTHREAD_AFFINITY)
   endif()
   ```


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