diff --git a/Makefile.linux b/Makefile.linux
new file mode 100644
index 0000000..8c10820
--- /dev/null
+++ b/Makefile.linux
@@ -0,0 +1,39 @@
+# -*- Makefile -*-
+
+SDL_CFLAGS := $(shell sdl2-config --cflags)
+SDL_LFLAGS := -lSDL2_ttf $(shell sdl2-config --libs)
+
+CXXFLAGS = -Isrc -Isrc/sys -D_SYSTEM3 -D_DEBUG_CONSOLE -MMD $(SDL_CFLAGS) -g
+
+LIBS =
+
+OBJS = src/fileio.o \
+	src/sdlmain.o \
+	src/sys/ags.o \
+	src/sys/ags_bmp.o \
+	src/sys/ags_cursor.o \
+	src/sys/ags_draw.o \
+	src/sys/ags_pms.o \
+	src/sys/ags_text.o \
+	src/sys/ags_vsp.o \
+	src/sys/ags_window.o \
+	src/sys/dri.o \
+	src/sys/mako.o \
+	src/sys/mako_midi.o \
+	src/sys/nact.o \
+	src/sys/nact_crc32.o \
+	src/sys/nact_input.o \
+	src/sys/nact_sys3.o \
+	src/linux/nact_linux.o \
+	src/linux/mako_linux.o \
+	src/linux/unicode.o
+
+DEPS := $(OBJS:%.o=%.d)
+
+system3: $(OBJS)
+	$(CXX) $(OBJS) $(SDL_LFLAGS) $(LIBS) -o $@
+
+clean:
+	rm -f src/*.o src/sys/*.o src/win/*.o src/res3/*.o system3 $(DEPS)
+
+-include $(DEPS)
diff --git a/src/common.h b/src/common.h
index 7dffb41..fd7d1eb 100644
--- a/src/common.h
+++ b/src/common.h
@@ -9,13 +9,13 @@
 
 #include <SDL.h>
 #include <assert.h>
+#include <limits.h>
 
 // tchar.h shim
 typedef char _TCHAR;
 #ifndef _T
 #define _T(s) s
 #endif
-#define _tfopen_s fopen_s
 #define _tcscpy_s strcpy_s
 #define _tcslen strlen
 #define _stprintf_s sprintf_s
@@ -28,6 +28,13 @@ typedef signed char int8;
 typedef signed short int16;
 typedef signed long int32;
 
+#ifndef WIN32
+#define _MAX_PATH PATH_MAX
+#define sscanf_s sscanf
+#define sprintf_s snprintf
+void strcpy_s(char* dst, size_t n, const char* src);
+#endif
+
 // utilities
 uint16 sjis_to_unicode(uint16 sjis);
 
diff --git a/src/fileio.cpp b/src/fileio.cpp
index 605765f..99d2f17 100644
--- a/src/fileio.cpp
+++ b/src/fileio.cpp
@@ -28,17 +28,17 @@ bool FILEIO::Fopen(_TCHAR *filename, int mode)
 	fp = NULL;
 	
 	if(mode == FILEIO_READ_BINARY) {
-		_tfopen_s(&fp, filename, _T("rb"));
+		fp = fopen(filename, _T("rb"));
 	} else if(mode == FILEIO_WRITE_BINARY) {
-		_tfopen_s(&fp, filename, _T("wb"));
+		fp = fopen(filename, _T("wb"));
 	} else if(mode == FILEIO_READ_WRITE_BINARY) {
-		_tfopen_s(&fp, filename, _T("r+b"));
+		fp = fopen(filename, _T("r+b"));
 	} else if(mode == FILEIO_READ_ASCII) {
-		_tfopen_s(&fp, filename, _T("r"));
+		fp = fopen(filename, _T("r"));
 	} else if(mode == FILEIO_WRITE_ASCII) {
-		_tfopen_s(&fp, filename, _T("w"));
+		fp = fopen(filename, _T("w"));
 	} else if(mode == FILEIO_READ_WRITE_ASCII) {
-		_tfopen_s(&fp, filename, _T("r+w"));
+		fp = fopen(filename, _T("r+w"));
 	}
 	return (fp != NULL);
 }
diff --git a/src/linux/mako_linux.cpp b/src/linux/mako_linux.cpp
new file mode 100644
index 0000000..8c3a76e
--- /dev/null
+++ b/src/linux/mako_linux.cpp
@@ -0,0 +1,45 @@
+#include "mako.h"
+#include <fcntl.h>
+#include <unistd.h>
+
+static int midifd = -1;
+
+void MAKO::initialize_midi()
+{
+	midifd = open("/dev/midi1", O_RDWR);
+}
+
+void MAKO::release_midi()
+{
+	if (midifd >= 0)
+		close(midifd);
+}
+
+void MAKO::reset_midi()
+{
+	if (midifd < 0)
+		return;
+	const uint8 gs_reset[11] = {0xf0, 0x41, 0x20, 0x42, 0x12, 0x40, 0x00, 0x7f, 0x00, 0x41, 0xf7};
+	write(midifd, gs_reset, 11);
+}
+
+void MAKO::send_2bytes(uint8 d1, uint8 d2)
+{
+	if (midifd < 0)
+		return;
+	uint8 data[2];
+	data[0] = d1;
+	data[1] = d2;
+	write(midifd, data, 2);
+}
+
+void MAKO::send_3bytes(uint8 d1, uint8 d2, uint8 d3)
+{
+	if (midifd < 0)
+		return;
+	uint8 data[3];
+	data[0] = d1;
+	data[1] = d2;
+	data[2] = d3;
+	write(midifd, data, 3);
+}
diff --git a/src/linux/nact_linux.cpp b/src/linux/nact_linux.cpp
new file mode 100644
index 0000000..e26b2a4
--- /dev/null
+++ b/src/linux/nact_linux.cpp
@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include "nact.h"
+
+void NACT::text_dialog()
+{
+}
+
+void NACT::initialize_console()
+{
+}
+
+void NACT::release_console()
+{
+}
+
+void NACT::output_console(char log[])
+{
+#if defined(_DEBUG_CONSOLE)
+	fputs(log, stderr);
+#endif
+}
diff --git a/src/linux/unicode.cpp b/src/linux/unicode.cpp
new file mode 100644
index 0000000..b4a82b8
--- /dev/null
+++ b/src/linux/unicode.cpp
@@ -0,0 +1,13 @@
+#include "common.h"
+
+uint16 sjis_to_unicode(uint16 code)
+{
+	// TODO: correct impl
+	return code;
+}
+
+void strcpy_s(char* dst, size_t n, const char* src)
+{
+	strncpy(dst, src, n);
+	dst[n - 1] = '\0';
+}