diff -uNr CMP0.68/CMP.audioVD.c CMP0.68.linux/CMP.audioVD.c
--- CMP0.68/CMP.audioVD.c	2002-03-11 02:19:25.000000000 +0100
+++ CMP0.68.linux/CMP.audioVD.c	2003-07-10 02:20:28.000000000 +0200
@@ -167,7 +167,7 @@
     double              testFreq = 400.0;
     long                i, sqrsum;
     unsigned long       circBytes;
-    PaTimestamp         dummy = (PaTimestamp)NULL;
+    PaTimestamp         dummy = (PaTimestamp)0;
     short*              inputTestData;
     
     inputTestData = (short*)malloc(kCMPtransferSize * sizeof(short) * channels);    /* Interleaved buffer! */
Files CMP0.68/console/sgi_poll/CMP.sgi_console.o and CMP0.68.linux/console/sgi_poll/CMP.sgi_console.o differ
diff -uNr CMP0.68/Makefile.linux CMP0.68.linux/Makefile.linux
--- CMP0.68/Makefile.linux	2002-03-11 02:33:09.000000000 +0100
+++ CMP0.68.linux/Makefile.linux	2003-07-10 02:58:48.000000000 +0200
@@ -7,25 +7,19 @@
 
 #           Sourcefiles:
 SRCS	  = CMP.c\
-            midi/CMP.midi.c\
-#
-# linux-midi:
-# ??       	midi/sgi_libmd/sgi_midi.c\
-# 
-            console/CMP.handy.c\
-#
-# linux-console:
-# ??      	console/sgi_poll/CMP.sgi_console.c\
-#
-            CMP.incantation.c\
-            CMP.file.c\
-            CMP.fft.c\
-            CMP.tables.c\
-            CMP.varidist.c\
-            CMP.audioVD.c\
-            portaudio/pa_common/pa_lib.c\
-            portaudio/pa_unix_oss/pa_unix_oss.c\
-            gt/gtToolkit.c
+		midi/CMP.midi.c\
+		console/CMP.handy.c\
+		console/sgi_poll/CMP.sgi_console.c\
+		CMP.incantation.c\
+		CMP.file.c\
+		CMP.fft.c\
+		CMP.tables.c\
+		CMP.varidist.c\
+		CMP.audioVD.c\
+		midi/linux_midi/linux_midi.c\
+		portaudio/pa_common/pa_lib.c\
+		portaudio/pa_unix_oss/pa_unix_oss.c\
+		gt/gtToolkit.c
 
 #           Compiler GCC:
 CC	 	  = gcc
@@ -98,7 +92,8 @@
 #------------------ Only keep the sources: ----------------------------------------
 clean:
 	rm *.o fft/*.o \
-    midi/*.o \
+	midi/*.o \
+	midi/midi_linux/*.o
 	console/*.o \
 	portaudio/pa_common/*.o \
 	portaudio/pa_unix_oss/*.o \
diff -uNr CMP0.68/midi/linux_midi/linux_midi.c CMP0.68.linux/midi/linux_midi/linux_midi.c
--- CMP0.68/midi/linux_midi/linux_midi.c	1970-01-01 01:00:00.000000000 +0100
+++ CMP0.68.linux/midi/linux_midi/linux_midi.c	2003-07-10 02:50:47.000000000 +0200
@@ -0,0 +1,30 @@
+/* this is just a temporary placeholder to make ComParser compile */
+
+#include "../CMP.midi.h"        /* Comparser include from parent directory. */
+
+void * 
+specificOpenMIDI(CMP_MIDI_IO* mio)
+{
+  /* TODO: implement */
+}
+
+void 
+specificCloseMIDI(CMP_MIDI_IO* mio)
+{
+  /* TODO: implement */
+}
+
+long 
+receiveMIDI(CMP_MIDI_IO * mio)
+{
+  /* TODO: implement */
+}
+
+int   
+sendMIDI(CMP_MIDI_IO * mio,
+	 unsigned char * ptr, 
+	 int length, 
+	 int interface)
+{
+  /* TODO: implement */
+}