From 012cd62c81af01c6089d57871d492636b843e4a5 Mon Sep 17 00:00:00 2001
From: Mark Borgerding <mark@borgerding.net>
Date: Wed, 2 Dec 2009 22:58:34 -0500
Subject: explicitly cast to use the acos(long double)

---
 unsupported/test/FFT.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'unsupported/test/FFT.cpp')

diff --git a/unsupported/test/FFT.cpp b/unsupported/test/FFT.cpp
index 3e4126522..b029ba655 100644
--- a/unsupported/test/FFT.cpp
+++ b/unsupported/test/FFT.cpp
@@ -45,7 +45,7 @@ complex<long double>  promote(long double x) { return complex<long double>( x);
         long double totalpower=0;
         long double difpower=0;
         cerr <<"idx\ttruth\t\tvalue\t|dif|=\n";
-        long double pi = acos(-1);
+        long double pi = acos((long double)-1);
         for (size_t k0=0;k0<size_t(fftbuf.size());++k0) {
             complex<long double> acc = 0;
             long double phinc = -2.*k0* pi / timebuf.size();
-- 
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