Ok, now we actually check if we can use cpuid before using it. With evil AT&T inlined ASM from ui.asm [Nach]

zsnes/src/acinclude.m4

@@ -306,6 +306,26 @@ if test x$enable_cpucheck != xno; then
     }
   }
 
+  int have_cpuid()
+  {
+    int have = 0x200000;
+    asm volatile
+    (
+      "pushfl           \n\t"
+      "pop %%eax        \n\t"
+      "movl %%eax,%%edx \n\t"
+      "xorl %%ecx,%%eax \n\t"
+      "push %%eax       \n\t"
+      "popfl            \n\t"
+      "pushfl           \n\t"
+      "pop %%eax        \n\t"
+      "xorl %%edx,%%eax \n\t"
+      : "=a" (have)
+      : "c" (have)
+    );
+    return(have);
+  }
+
   int main(int argc, char *argv[])
   {
     char model_name[216], flags[216], cpu_family[216];
@@ -342,7 +362,7 @@ if test x$enable_cpucheck != xno; then
       }
       fclose(fp);
     }
-    else
+    else if (have_cpuid())
     {
       unsigned int maxei, eax, ebx, ecx, edx, unused, i;
 
@@ -395,6 +415,8 @@ if test x$enable_cpucheck != xno; then
       }
     }
 
+    if (*cpu_family && *vendor_id)
+    {
       if (!strcmp(vendor_id, "AuthenticAMD") || strstr(model_name, "AMD"))
       {
         if (strstr(flags, " mmx "))
@@ -528,6 +550,7 @@ if test x$enable_cpucheck != xno; then
         fclose(fp);
         return(0);
       }
+    }
 
     return(1);
   }