From 0534026e217d963042951ca9ba4a7b5aa397a3b3 Mon Sep 17 00:00:00 2001
From: Holger Vogt <holger.vogt@uni-due.de>
Date: Sun, 2 Aug 2020 13:02:03 +0200
Subject: [PATCH] update to enable compiling for Linux and Cygwin

---
 README.wavsim |  6 +++++-
 configure.ac  | 11 +++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/README.wavsim b/README.wavsim
index 0b342dfc7..6240de801 100644
--- a/README.wavsim
+++ b/README.wavsim
@@ -26,6 +26,10 @@ http://gareus.org/oss/spicesound/start
 
 A complete package for Windows is available at
 http://ngspice.sourceforge.net/download.html#wav .
-Test on Linux and macOS will follow.
+
+For Linux you have to install libsamplerate and libsndfile and their development headers.
+./compile_linux.sh will then compile and install ngspice with *.wav capability.
+
+Test on macOS will follow.
 
 
diff --git a/configure.ac b/configure.ac
index 2c4f15457..0b983b846 100644
--- a/configure.ac
+++ b/configure.ac
@@ -933,6 +933,17 @@ if test "x$with_fftw3" != xno; then
          LIBS="$LIBS -lfftw3"])
 fi
 
+AC_CHECK_HEADERS([sndfile.h])
+AC_CHECK_LIB([sndfile], [sf_command],
+        [AC_DEFINE([HAVE_LIBSNDFILE], [], [Have libsndfile])
+         LIBS="$LIBS -lsndfile"])
+
+AC_CHECK_HEADERS([samplerate.h])
+AC_CHECK_LIB([samplerate], [src_process],
+        [AC_DEFINE([HAVE_LIBSAMPLERATE], [], [Have libsamplerate])
+         LIBS="$LIBS -lsamplerate"])
+
+
 # Check for a few mathematical functions:
 AC_CHECK_FUNCS([erfc logb scalb scalbn asinh acosh atanh finite])
 # According POSIX we should look for macros first