From f37ab2c95709480faceb8756ad52e754a460b466 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <kwojtus@protonmail.com>
Date: Sat, 1 Jun 2019 17:02:24 +0200
Subject: make pi global constant

---
 src/f1.f90 | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/f1.f90 b/src/f1.f90
index f8054cd..955be71 100644
--- a/src/f1.f90
+++ b/src/f1.f90
@@ -5,6 +5,9 @@ PROGRAM test
   
   INCLUDE 'fftw3.f03'
 
+  real(kind=8), parameter :: pi = acos(-1.0) ! also used from f1()
+
+  ! rest of variables only used from "main" program code
   integer, parameter :: npoints = 1024, ncomplex = npoints / 2 + 1
   real(kind=8), parameter :: start = 0, end = 1
   integer :: i
@@ -72,7 +75,6 @@ CONTAINS
 
   PURE real(kind=8) FUNCTION f1(t)
     real(kind=8), intent(in) :: t
-    real(kind=8), parameter :: pi = acos(-1.0)
     
     f1 = sin(2 * pi * t * 200) + 2 * sin(2 * pi * t * 400)
 
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