--- a/configure.in	Wed Dec 16 19:50:51 2009 +0000
+++ b/configure.in	Thu Dec 17 03:04:04 2009 +0000
@@ -207,7 +207,7 @@
         AC_DEFINE(HAVE_MPROTECT)
         ]),
     )
-    AC_CHECK_FUNCS(malloc calloc realloc free getenv setenv putenv unsetenv qsort abs bcopy memset memcpy memmove strlen strlcpy strlcat strdup _strrev _strupr _strlwr strchr strrchr strstr itoa _ltoa _uitoa _ultoa strtol strtoul _i64toa _ui64toa strtoll strtoull atoi atof strcmp strncmp _stricmp strcasecmp _strnicmp strncasecmp sscanf snprintf vsnprintf sigaction setjmp nanosleep sysctlbyname)
+    AC_CHECK_FUNCS(malloc calloc realloc free getenv setenv putenv unsetenv qsort abs bcopy memset memcpy memmove strlen strlcpy strlcat strdup _strrev _strupr _strlwr strchr strrchr strstr itoa _ltoa _uitoa _ultoa strtol strtoul _i64toa _ui64toa strtoll strtoull atoi atof strcmp strncmp _stricmp strcasecmp _strnicmp strncasecmp sscanf snprintf vsnprintf sigaction setjmp nanosleep sysconf sysctlbyname)
 
     AC_CHECK_LIB(m, pow, [LIBS="$LIBS -lm"; EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lm"])
     AC_CHECK_FUNCS(ceil copysign cos cosf fabs floor log pow scalbn sin sinf sqrt)

--- a/include/SDL_config.h.in	Wed Dec 16 19:50:51 2009 +0000
+++ b/include/SDL_config.h.in	Thu Dec 17 03:04:04 2009 +0000
@@ -151,6 +151,7 @@
 #undef HAVE_SIGACTION
 #undef HAVE_SETJMP
 #undef HAVE_NANOSLEEP
+#undef HAVE_SYSCONF
 #undef HAVE_SYSCTLBYNAME
 #undef HAVE_CLOCK_GETTIME
 #undef HAVE_GETPAGESIZE

--- a/include/SDL_config_iphoneos.h	Wed Dec 16 19:50:51 2009 +0000
+++ b/include/SDL_config_iphoneos.h	Thu Dec 17 03:04:04 2009 +0000
@@ -108,6 +108,7 @@
 #define HAVE_SIGACTION	1
 #define HAVE_SETJMP	1
 #define HAVE_NANOSLEEP	1
+#define HAVE_SYSCONF	1
 #define HAVE_SYSCTLBYNAME 1
 
 /* enable iPhone version of Core Audio driver */

--- a/include/SDL_config_macosx.h	Wed Dec 16 19:50:51 2009 +0000
+++ b/include/SDL_config_macosx.h	Thu Dec 17 03:04:04 2009 +0000
@@ -106,6 +106,7 @@
 #define HAVE_SIGACTION	1
 #define HAVE_SETJMP	1
 #define HAVE_NANOSLEEP	1
+#define HAVE_SYSCONF	1
 #define HAVE_SYSCTLBYNAME 1
 
 /* Enable various audio drivers */

--- a/src/cpuinfo/SDL_cpuinfo.c	Wed Dec 16 19:50:51 2009 +0000
+++ b/src/cpuinfo/SDL_cpuinfo.c	Thu Dec 17 03:04:04 2009 +0000
@@ -25,6 +25,9 @@
 
 #include "SDL_cpuinfo.h"
 
+#ifdef HAVE_SYSCONF
+#include <unistd.h>
+#endif
 #ifdef HAVE_SYSCTLBYNAME
 #include <sys/types.h>
 #include <sys/sysctl.h>
@@ -297,21 +300,26 @@
 SDL_GetCPUCount()
 {
     if (!SDL_CPUCount) {
+#ifdef HAVE_SYSCONF
+        if (SDL_CPUCount <= 0) {
+            SDL_CPUCount = (int)sysconf(_SC_NPROCESSORS_ONLN);
+        }
+#endif
 #ifdef HAVE_SYSCTLBYNAME
-        {
+        if (SDL_CPUCount <= 0) {
             size_t size = sizeof(SDL_CPUCount);
             sysctlbyname("hw.ncpu", &SDL_CPUCount, &size, NULL, 0);
         }
 #endif
 #ifdef __WIN32__
-        {
+        if (SDL_CPUCount <= 0) {
             SYSTEM_INFO info;
             GetSystemInfo(&info);
             SDL_CPUCount = info.dwNumberOfProcessors;
         }
 #endif
         /* There has to be at least 1, right? :) */
-        if (!SDL_CPUCount) {
+        if (SDL_CPUCount <= 0) {
             SDL_CPUCount = 1;
         }
     }