attempting to address error : error: 'sysctlbyname' was not declared in this scope; did you mean 'SYS_sysctlbyname'?

  ld: library not found for -lrt
  collect2: error: ld returned 1 exit status
  [2/164] Building CXX object models/mpt/CMakeFiles/mpt.dir/__/model_utils/util.cpp.o
  FAILED: models/mpt/CMakeFiles/mpt.dir/__/model_utils/util.cpp.o
  /usr/local/opt/gcc/bin/g++-13 -DNE_GELU_USE_VEC -DNE_SIMD_VEC_DOT_F16 -I/Users/nezda/code/itrex/intel_extension_for_transformers/llm/runtime/graph -I/Users/nezda/code/itrex/intel_extension_for_transformers/llm/runtime/graph/core/. -I/Users/nezda/code/itrex/intel_extension_for_transformers/llm/library/jblas -O3 -DNDEBUG -std=c++17 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX13.3.sdk -fPIC -mf16c -mfma -mavx -mavx2 -fopenmp -MD -MT models/mpt/CMakeFiles/mpt.dir/__/model_utils/util.cpp.o -MF models/mpt/CMakeFiles/mpt.dir/__/model_utils/util.cpp.o.d -o models/mpt/CMakeFiles/mpt.dir/__/model_utils/util.cpp.o -c /Users/nezda/code/itrex/intel_extension_for_transformers/llm/runtime/graph/models/model_utils/util.cpp
  /Users/nezda/code/itrex/intel_extension_for_transformers/llm/runtime/graph/models/model_utils/util.cpp: In function 'int32_t get_num_physical_cores()':
  /Users/nezda/code/itrex/intel_extension_for_transformers/llm/runtime/graph/models/model_utils/util.cpp:36:16: error: 'sysctlbyname' was not declared in this scope; did you mean 'SYS_sysctlbyname'?
     36 |   int result = sysctlbyname("hw.perflevel0.physicalcpu", &num_physical_cores, &len, NULL, 0);
        |                ^~~~~~~~~~~~
        |                SYS_sysctlbyname
  [3/164] Building CXX object models/llama/CMakeFiles/llama.dir/__/model_utils/util.cpp.o
  FAILED: models/llama/CMakeFiles/llama.dir/__/model_utils/util.cpp.o
  /usr/local/opt/gcc/bin/g++-13 -DNE_GELU_USE_VEC -DNE_SIMD_VEC_DOT_F16 -I/Users/nezda/code/itrex/intel_extension_for_transformers/llm/runtime/graph -I/Users/nezda/code/itrex/intel_extension_for_transformers/llm/runtime/graph/core/. -I/Users/nezda/code/itrex/intel_extension_for_transformers/llm/library/jblas -O3 -DNDEBUG -std=c++17 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX13.3.sdk -fPIC -mf16c -mfma -mavx -mavx2 -fopenmp -MD -MT models/llama/CMakeFiles/llama.dir/__/model_utils/util.cpp.o -MF models/llama/CMakeFiles/llama.dir/__/model_utils/util.cpp.o.d -o models/llama/CMakeFiles/llama.dir/__/model_utils/util.cpp.o -c /Users/nezda/code/itrex/intel_extension_for_transformers/llm/runtime/graph/models/model_utils/util.cpp
  /Users/nezda/code/itrex/intel_extension_for_transformers/llm/runtime/graph/models/model_utils/util.cpp: In function 'int32_t get_num_physical_cores()':
  /Users/nezda/code/itrex/intel_extension_for_transformers/llm/runtime/graph/models/model_utils/util.cpp:36:16: error: 'sysctlbyname' was not declared in this scope; did you mean 'SYS_sysctlbyname'?
     36 |   int result = sysctlbyname("hw.perflevel0.physicalcpu", &num_physical_cores, &len, NULL, 0);
        |                ^~~~~~~~~~~~
        |                SYS_sysctlbyname

Signed-off-by: Luke Nezda <lnezda@gmail.com>

Author: nezda

intel_extension_for_transformers/llm/runtime/graph/models/model_utils/util.cpp

@@ -33,11 +33,11 @@ int32_t get_num_physical_cores() {
 #elif defined(__APPLE__) && defined(__MACH__)
   int32_t num_physical_cores;
   size_t len = sizeof(num_physical_cores);
-  int result = sysctlbyname("hw.perflevel0.physicalcpu", &num_physical_cores, &len, NULL, 0);
+  int result = syscall(SYS_sysctlbyname, "hw.perflevel0.physicalcpu", &num_physical_cores, &len, NULL, 0);
   if (result == 0) {
     return num_physical_cores;
   }
-  result = sysctlbyname("hw.physicalcpu", &num_physical_cores, &len, NULL, 0);
+  result = syscall(SYS_sysctlbyname, "hw.physicalcpu", &num_physical_cores, &len, NULL, 0);
   if (result == 0) {
     return num_physical_cores;
   }