From 5136295b21aac41709672c17a5a596f996a27735 Mon Sep 17 00:00:00 2001
From: Daniel Black <daniel.black@au1.ibm.com>
Date: Sun, 2 Apr 2017 20:11:12 +1000
Subject: OSX: get cache line size

---
 cmake/cpu_info.cmake | 28 +++++++++++++++++++++-------
 1 file changed, 21 insertions(+), 7 deletions(-)

(limited to 'cmake/cpu_info.cmake')

diff --git a/cmake/cpu_info.cmake b/cmake/cpu_info.cmake
index 32b98142ace..1772510e72b 100644
--- a/cmake/cpu_info.cmake
+++ b/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)
-- 
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