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-rw-r--r--Include/pyport.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/Include/pyport.h b/Include/pyport.h
index 4914886..f35d8e6 100644
--- a/Include/pyport.h
+++ b/Include/pyport.h
@@ -374,6 +374,19 @@ typedef struct fd_set {
#define LONG_MIN (-LONG_MAX-1)
#endif
+#ifndef LONG_BIT
+#define LONG_BIT (8 * SIZEOF_LONG)
+#endif
+
+#if LONG_BIT != 8 * SIZEOF_LONG
+/* 04-Oct-2000 LONG_BIT is apparently (mis)defined as 64 on some recent
+ * 32-bit platforms using gcc. We try to catch that here at compile-time
+ * rather than waiting for integer multiplication to trigger bogus
+ * overflows.
+ */
+#error "LONG_BIT definition appears wrong for platform (bad gcc config?)."
+#endif
+
#ifdef __NeXT__
#ifdef __sparc__
/*