Build fails on i386 and armv7: non-constant-expression cannot be narrowed from type 'unsigned long long' to 'size_t'

[yurivict]

[ 76% 55/71] /usr/bin/c++ -DDMLC_LOG_CUSTOMIZE=1 -DXGBOOST_BUILTIN_PREFETCH_PRESENT=1 -DXGBOOST_MM_PREFETCH_PRESENT=1 -D_MWAITXINTRIN_H_INCLUDED -I/wrkdirs/usr/ports/misc/xgboost/work/xgboost-1.7.1/include -I/wrkdirs/usr/ports/misc/xgboost/work/xgboost-1.7.1/dmlc-core/include -I/wrkdirs/usr/ports/misc/xgboost/work/xgboost-1.7.1/rabit/include -O2 -pipe -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -O2 -pipe -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include  -DNDEBUG -fPIC -funroll-loops -pthread -std=gnu++14 -MD -MT src/CMakeFiles/objxgboost.dir/predictor/cpu_predictor.cc.o -MF src/CMakeFiles/objxgboost.dir/predictor/cpu_predictor.cc.o.d -o src/CMakeFiles/objxgboost.dir/predictor/cpu_predictor.cc.o -c /wrkdirs/usr/ports/misc/xgboost/work/xgboost-1.7.1/src/predictor/cpu_predictor.cc
FAILED: src/CMakeFiles/objxgboost.dir/predictor/cpu_predictor.cc.o
/usr/bin/c++ -DDMLC_LOG_CUSTOMIZE=1 -DXGBOOST_BUILTIN_PREFETCH_PRESENT=1 -DXGBOOST_MM_PREFETCH_PRESENT=1 -D_MWAITXINTRIN_H_INCLUDED -I/wrkdirs/usr/ports/misc/xgboost/work/xgboost-1.7.1/include -I/wrkdirs/usr/ports/misc/xgboost/work/xgboost-1.7.1/dmlc-core/include -I/wrkdirs/usr/ports/misc/xgboost/work/xgboost-1.7.1/rabit/include -O2 -pipe -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -O2 -pipe -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include  -DNDEBUG -fPIC -funroll-loops -pthread -std=gnu++14 -MD -MT src/CMakeFiles/objxgboost.dir/predictor/cpu_predictor.cc.o -MF src/CMakeFiles/objxgboost.dir/predictor/cpu_predictor.cc.o.d -o src/CMakeFiles/objxgboost.dir/predictor/cpu_predictor.cc.o -c /wrkdirs/usr/ports/misc/xgboost/work/xgboost-1.7.1/src/predictor/cpu_predictor.cc
/wrkdirs/usr/ports/misc/xgboost/work/xgboost-1.7.1/src/predictor/cpu_predictor.cc:167:24: error: non-constant-expression cannot be narrowed from type 'unsigned long long' to 'size_t' (aka 'unsigned int') in initializer list [-Wc++11-narrowing]
    size_t non_missing{beg};
                       ^~~
/wrkdirs/usr/ports/misc/xgboost/work/xgboost-1.7.1/src/predictor/cpu_predictor.cc:167:24: note: insert an explicit cast to silence this issue
    size_t non_missing{beg};
                       ^~~
                       static_cast<size_t>( )
1 error generated.

Version: 1.7.1
clang-14
FreeBSD 13.1

[hcho3]

See #9035 (comment). We (core maintainers of XGBoost project) decided that XGBoost 2.0+ will not support 32-bit systems.