[patch] fix the compile time test for working popcnt

fix_popcnt_test.patch (text/plain), 851 bytes, created by Carl Michal on 2021-05-23 03:37:17 UTC

diff -ur numpy-1.20.2.orig/numpy/distutils/checks/cpu_popcnt.c numpy-1.20.2/numpy/distutils/checks/cpu_popcnt.c
--- numpy-1.20.2.orig/numpy/distutils/checks/cpu_popcnt.c	2021-05-22 20:31:45.847812877 -0700
+++ numpy-1.20.2/numpy/distutils/checks/cpu_popcnt.c	2021-05-22 20:32:02.157026731 -0700
@@ -4,20 +4,26 @@
     #include <popcntintrin.h>
 #endif
 
+#include <stdlib.h>
+
 int main(void)
 {
     long long a = 0;
     int b;
+    
+    a = random();
+    b = random();
+      
 #ifdef _MSC_VER
     #ifdef _M_X64
-    a = _mm_popcnt_u64(1);
+    a = _mm_popcnt_u64(a);
     #endif
-    b = _mm_popcnt_u32(1);
+    b = _mm_popcnt_u32(b);
 #else
     #ifdef __x86_64__
-    a = __builtin_popcountll(1);
+    a = __builtin_popcountll(a);
     #endif
-    b = __builtin_popcount(a);
+    b = __builtin_popcount(b);
 #endif
     return (int)a + b;
 }