Determine number of system cores and set value of -j appropriately

[freeradius.git] / m4 / ax_cc.m4

diff --git a/m4/ax_cc.m4 b/m4/ax_cc.m4
index c88f45a..efcf15f 100644 (file)
--- a/m4/ax_cc.m4
+++ b/m4/ax_cc.m4
@@ -50,3 +50,66 @@ AC_DEFUN([AX_CC_WDOCUMENTATION_FLAG],[
     CFLAGS="$CFLAGS_SAVED"
   ])
 ])
+
+dnl #
+dnl # Determine the number of system cores we have
+dnl #
+AC_DEFUN([AX_SYSTEM_CORES],[
+  AC_CACHE_CHECK([number of system cores], [ax_cv_system_cores],
+    [
+      AC_LANG_PUSH(C)
+
+      AC_TRY_RUN(
+        [
+          #include <stdio.h>
+          #include <stdint.h>
+          #ifdef _WIN32
+          #  include <windows.h>
+          #elif MACOS
+          #  include <sys/param.h>
+          #  include <sys/sysctl.h>
+          #else
+          #  include <unistd.h>
+          #endif
+          
+          int main (int argc, char *argv[])
+          {
+            uint32_t count;
+            
+            #ifdef WIN32
+            SYSTEM_INFO sysinfo;
+            GetSystemInfo(&sysinfo);
+      
+            count = sysinfo.dwNumberOfProcessors;
+            #elif MACOS
+            
+            int nm[2];
+            size_t len = 4;
+      
+            nm[0] = CTL_HW;
+            nm[1] = HW_AVAILCPU;
+            sysctl(nm, 2, &count, &len, NULL, 0);
+      
+            if(count < 1) {
+              nm[1] = HW_NCPU;
+              sysctl(nm, 2, &count, &len, NULL, 0);
+              if(count < 1) {
+             count = 1;
+              }
+            }
+            #else
+         
+           count = sysconf(_SC_NPROCESSORS_ONLN);
+            #endif
+
+            return count;
+          }
+        ],
+        [ax_cv_system_cores=$?],
+        [ax_cv_system_cores=$?],
+        [ax_cv_system_cores=]
+    ) 
+    AC_LANG_POP
+  ])
+])
+