From 201ae8cac7216b9743c43d9c7a75b72b54181647 Mon Sep 17 00:00:00 2001
From: Holger Vogt <holger.vogt@uni-due.de>
Date: Sun, 10 May 2026 16:35:28 +0200
Subject: [PATCH] Allow building without soundfile libraries. Emit error
 message if soundfile source is requested.

---
 src/spicelib/devices/vsrc/vsrcpar.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/spicelib/devices/vsrc/vsrcpar.c b/src/spicelib/devices/vsrc/vsrcpar.c
index 94f1a5cae..0b235d279 100644
--- a/src/spicelib/devices/vsrc/vsrcpar.c
+++ b/src/spicelib/devices/vsrc/vsrcpar.c
@@ -296,6 +296,7 @@ VSRCparam(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
         break;
 
         case VSRC_SOUND: {
+#if defined(HAVE_LIBSNDFILE) && defined(HAVE_LIBSAMPLERATE)
             int id, channel;
             double oversampling;
             here->VSRCfunctionType = SOUND;
@@ -315,6 +316,10 @@ VSRCparam(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
             oversampling = here->VSRCcoeffs[5];
             vsjack_open(id, jfile, channel, oversampling);
             tfree(jfile);
+#else
+            fprintf(stderr, "\nError: ngspice is compiled without soundfile support!\n");
+            controlled_exit(EXIT_BAD);
+#endif
         }
         break;