From 80c1faf0769abfb459c5c749206ed02311d8274b Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Fri, 27 Aug 2021 12:42:23 +0900
Subject: Use C99-defined signbit macro

---
 math.c | 5 -----
 1 file changed, 5 deletions(-)

(limited to 'math.c')

diff --git a/math.c b/math.c
index dd98d8806e..429826763d 100644
--- a/math.c
+++ b/math.c
@@ -26,11 +26,6 @@
 #include "internal/object.h"
 #include "internal/vm.h"
 
-#if defined(HAVE_SIGNBIT) && defined(__GNUC__) && defined(__sun) && \
-    !defined(signbit)
-    extern int signbit(double);
-#endif
-
 #define RB_BIGNUM_TYPE_P(x) RB_TYPE_P((x), T_BIGNUM)
 
 VALUE rb_mMath;
-- 
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