From a9b126783de5315c449651770b40e5a7f4d09f33 Mon Sep 17 00:00:00 2001
From: Lassi Kortela <lassi@lassi.io>
Date: Mon, 14 Oct 2019 00:52:30 +0300
Subject: [PATCH] Test for 64-bit instead of assuming it

---
 c/scheme_compiler_gnuc.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/c/scheme_compiler_gnuc.h b/c/scheme_compiler_gnuc.h
index c7a11a4..01cf886 100644
--- a/c/scheme_compiler_gnuc.h
+++ b/c/scheme_compiler_gnuc.h
@@ -2,7 +2,11 @@ typedef uintptr_t value_t;
 typedef uintptr_t ufixnum_t;
 typedef intptr_t fixnum_t;
 
+#undef BITS64
+#if UINTPTR_MAX == 0xffffffffffffffffULL
 #define BITS64
+#endif
+
 #define SCHEME_C_COMPILER_NAME "GCC"  // TODO: wrong
 #define SCHEME_C_COMPILER_VERSION __VERSION__