From f74a7580513879a6edd8b8f9e271b227d5cd34a3 Mon Sep 17 00:00:00 2001
From: Matthew Flatt <mflatt@racket-lang.org>
Date: Sun, 29 Nov 2020 16:08:30 -0700
Subject: [PATCH] rktio: bring back old CPU-count code for PPC Mac OS

---
 racket/src/rktio/rktio_cpu.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/racket/src/rktio/rktio_cpu.c b/racket/src/rktio/rktio_cpu.c
index 807509e386..e513d78f8a 100644
--- a/racket/src/rktio/rktio_cpu.c
+++ b/racket/src/rktio/rktio_cpu.c
@@ -1,7 +1,10 @@
 #include "rktio.h"
 #include "rktio_private.h"
 
-#if defined(__linux__) || defined(__QNX__) || defined(OS_X) || defined(__FreeBSD__) || defined(__OpenBSD__)
+#if defined(OS_X) && defined(__POWERPC__)
+# include <sys/param.h>
+# include <sys/sysctl.h>
+#elif defined(__linux__) || defined(__QNX__) || defined(OS_X) || defined(__FreeBSD__) || defined(__OpenBSD__)
 # include <unistd.h>
 #elif defined(RKTIO_SYSTEM_WINDOWS)
 # include <windows.h>
@@ -11,7 +14,12 @@ void rktio_init_cpu(rktio_t *rktio)
 {
   int processor_count;
 
-#if defined(__linux__) || defined(__QNX__) || defined(OS_X) || defined(__FreeBSD__) || defined(__OpenBSD__)
+#if defined(OS_X) && defined(__POWERPC__)
+  size_t size = sizeof(processor_count);
+ 
+  if (sysctlbyname("hw.ncpu", &processor_count, &size, NULL, 0))
+    processor_count = 2;
+#elif defined(__linux__) || defined(__QNX__) || defined(OS_X) || defined(__FreeBSD__) || defined(__OpenBSD__)
   processor_count = sysconf(_SC_NPROCESSORS_ONLN);
 #elif defined(RKTIO_SYSTEM_WINDOWS)
   SYSTEM_INFO sysinfo;