From 700aeee754648204314b644f24a75aaebe438ca7 Mon Sep 17 00:00:00 2001
From: ngoto <ngoto@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 5 Aug 2011 07:03:21 +0000
Subject: * complex.c (f_signbit): fix compile error in gcc4 on Solaris with  
 CFLAGS="-std=gnu99".  [ruby-dev:44355] fix [Bug #5159]

* math.c: ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32858 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 complex.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'complex.c')

diff --git a/complex.c b/complex.c
index a21249681f..4be8099ed6 100644
--- a/complex.c
+++ b/complex.c
@@ -1173,8 +1173,9 @@ nucomp_eql_p(VALUE self, VALUE other)
 inline static VALUE
 f_signbit(VALUE x)
 {
-#if defined(HAVE_SIGNBIT) && defined(__GNUC__) && defined(__sun__)
-    extern int signbit(double x);
+#if defined(HAVE_SIGNBIT) && defined(__GNUC__) && defined(__sun__) && \
+    !defined(signbit)
+    extern int signbit(double);
 #endif
     switch (TYPE(x)) {
       case T_FLOAT: {
-- 
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