OSX: get cache line size

Author: Daniel Black

cmake/cpu_info.cmake

@@ -15,15 +15,29 @@
 
 # Symbols with information about the CPU.
 
-FIND_PROGRAM(GETCONF getconf)
-MARK_AS_ADVANCED(GETCONF)
+IF(CMAKE_SYSTEM_NAME MATCHES "Darwin")
+ FIND_PROGRAM(SYSCTL sysctl)
+ MARK_AS_ADVANCED(SYSCTL)
 
-IF(GETCONF)
- EXECUTE_PROCESS(
- COMMAND ${GETCONF} LEVEL1_DCACHE_LINESIZE
- OUTPUT_VARIABLE CPU_LEVEL1_DCACHE_LINESIZE
- )
+ IF(SYSCTL)
+ EXECUTE_PROCESS(
+ COMMAND ${SYSCTL} -n hw.cachelinesize
+ OUTPUT_VARIABLE CPU_LEVEL1_DCACHE_LINESIZE
+ )
+ ENDIF()
+
+ELSE()
+ FIND_PROGRAM(GETCONF getconf)
+ MARK_AS_ADVANCED(GETCONF)
+
+ IF(GETCONF)
+ EXECUTE_PROCESS(
+ COMMAND ${GETCONF} LEVEL1_DCACHE_LINESIZE
+ OUTPUT_VARIABLE CPU_LEVEL1_DCACHE_LINESIZE
+ )
+ ENDIF()
 ENDIF()
+
 IF(CPU_LEVEL1_DCACHE_LINESIZE AND CPU_LEVEL1_DCACHE_LINESIZE GREATER 0)
 ELSE()
  SET(CPU_LEVEL1_DCACHE_LINESIZE 64)