From 91d3e09d944b116a7d0ff63837d0609314331a55 Mon Sep 17 00:00:00 2001
From: sezero <sezero@users.sourceforge.net>
Date: Sat, 3 Dec 2016 01:37:32 +0300
Subject: [PATCH] provide a Makefile.os2 (to be used with Watcom, tested with
 OpenWatcom 1.9)

---
 Makefile.am      |  2 +-
 os2/Makefile.os2 | 37 +++++++++++++++++++++++++++++++++++++
 os2/unistd.h     |  8 ++++++++
 os2/usleep.c     |  6 ++++++
 4 files changed, 52 insertions(+), 1 deletion(-)
 create mode 100644 os2/Makefile.os2
 create mode 100644 os2/unistd.h
 create mode 100644 os2/usleep.c

diff --git a/Makefile.am b/Makefile.am
index d920600..8eaf85e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,4 +2,4 @@
 
 SUBDIRS = src
 
-EXTRA_DIST = CREDITS Changelog girl_from_mars.xm
+EXTRA_DIST = CREDITS Changelog girl_from_mars.xm os2/Makefile.os2 os2/unistd.h os2/usleep.c
diff --git a/os2/Makefile.os2 b/os2/Makefile.os2
new file mode 100644
index 0000000..05ba15d
--- /dev/null
+++ b/os2/Makefile.os2
@@ -0,0 +1,37 @@
+# Makefile for OS/2 using Watcom compiler.
+#
+# wmake -f Makefile.os2
+
+CC=wcc386
+INCLUDES=-I..\os2 -I..\src
+CPPFLAGS=-DHAVE_SIGNAL_H -DHAVE_SYS_TIME_H
+CPPFLAGS+= -DSOUND_OS2DART
+CPPFLAGS+= -DVERSION="4.2.0"
+# for an exe using libxmp.dll: link to libxmp.lib
+# for a statically linked exe: link to xmp_static.lib
+LIBS=libxmp.lib mmpm2.lib
+#LIBS=xmp_static.lib mmpm2.lib
+CFLAGS = -bt=os2 -bm -fp5 -fpi87 -mf -oeatxh -w4 -zp8 -ei -q
+# -5s  :  Pentium stack calling conventions.
+# -5r  :  Pentium register calling conventions.
+CFLAGS+= -5s
+
+.SUFFIXES:
+.SUFFIXES: .obj .c
+
+AOUT=xmp.exe
+COMPILE=$(CC) $(CFLAGS) $(CPPFLAGS) $(INCLUDES)
+
+OBJ = commands.obj getopt.obj getopt1.obj info.obj main.obj options.obj read_config.obj sound.obj sound_aiff.obj sound_file.obj sound_null.obj sound_wav.obj sound_dart.obj terminal.obj usleep.obj
+
+all: $(AOUT)
+
+$(AOUT): $(OBJ)
+	wlink N $(AOUT) SYS OS2V2 LIBR {$(LIBS)} F {$(OBJ)}
+
+clean:
+	FOR %F IN ( $(AOUT) $(OBJ) $(EXTRA_OBJ) ) DO IF EXIST %F ERASE %F
+
+.c: ..\src
+.c.obj:
+	$(COMPILE) -fo=$^@ $<
diff --git a/os2/unistd.h b/os2/unistd.h
new file mode 100644
index 0000000..5c3cea0
--- /dev/null
+++ b/os2/unistd.h
@@ -0,0 +1,8 @@
+#ifndef _XMP_OS2_UNISTD_H
+#define _XMP_OS2_UNISTD_H
+
+#include <io.h>  /* do not want Watcom unistd.h */
+
+void usleep (unsigned long usec);
+
+#endif
diff --git a/os2/usleep.c b/os2/usleep.c
new file mode 100644
index 0000000..f0e8a2b
--- /dev/null
+++ b/os2/usleep.c
@@ -0,0 +1,6 @@
+#define INCL_DOSPROCESS
+#include <os2.h>
+void usleep (unsigned long usec)
+{
+	DosSleep(usec ? (usec/1000l) : 1l);
+}