From 6a320264c2de3d6dd8cc1d1327b3c30df4c8cb26 Mon Sep 17 00:00:00 2001
From: Siddhesh Wani
Date: Mon, 25 May 2015 14:46:31 +0530
Subject: Original Version

---
 2.3-1/m4/fftw.m4 | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 2.3-1/m4/fftw.m4

(limited to '2.3-1/m4/fftw.m4')

diff --git a/2.3-1/m4/fftw.m4 b/2.3-1/m4/fftw.m4
new file mode 100644
index 00000000..8764aaba
--- /dev/null
+++ b/2.3-1/m4/fftw.m4
@@ -0,0 +1,16 @@
+dnl AC_FFTW
+dnl ------------------------------------------------------
+dnl Check if FFTW is usable and working
+dnl
+AC_DEFUN([AC_FFTW], [
+
+       AC_CHECK_HEADER([fftw3.h],[],[AC_MSG_ERROR([Cannot find headers (fftw3.h) of the library fftw. Please install the dev package (Debian : fftw3-dev)])])
+	   AC_CHECK_LIB([fftw3], [fftw_plan_dft_r2c],
+			[FFTW3_LIB=-lfftw3],
+            [AC_MSG_ERROR([libfftw3 : library missing. (Cannot find symbol fftw_plan_dft_r2c). Check if libfftw3 is installed and if the version is correct])]
+			)
+       AC_SUBST(FFTW3_LIB)
+	   AC_DEFINE([WITH_FFTW], [], [With FFTW])
+])
+
+
-- 
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