sources/Makefile |   46 ++++++++++++++++++++++++++++++++++++----------
 1 files changed, 36 insertions(+), 10 deletions(-)

diff --git a/sources/Makefile b/sources/Makefile
index 63c774f..8364ba3 100644
--- a/sources/Makefile
+++ b/sources/Makefile
@@ -28,43 +28,69 @@ AR=$(CROSS)ar
 OBJ4TH = errs_4th.o save_4th.o load_4th.o free_4th.o comp_4th.o \
 	name_4th.o dump_4th.o exec_4th.o open_4th.o cgen_4th.o
 
-all: lib4th.a 4th 4tsh # 4thc 4thd 4thx 4thg
+all: 4th 4tsh # 4thc 4thd 4thx 4thg
+
+ifdef SHARED
+MAJOR=0
+MINOR=60
+MICRO=3
+SHARED_LIB=lib4th.so.$(MAJOR).$(MINOR).$(MICRO)
+endif
+
+ifdef STATIC
+STATIC_LIB=lib4th.a
+else
+ifndef SHARED
+STATIC_LIB=lib4th.a
+endif
+endif
+
+lib4th: $(SHARED_LIB) $(STATIC_LIB)
+
+$(SHARED_LIB): $(OBJ4TH)
+	$(CC) -shared -o $@ $(OBJ4TH) -Wl,-soname,lib4th.so.$(MAJOR)
+	ln -sf $@ lib4th.so.$(MAJOR)
+	ln -sf $@ lib4th.so
 
 lib4th.a: $(OBJ4TH)
 	$(AR) r $@ $(OBJ4TH)
 
-4th: lib4th.a 4th.o
+4th: lib4th 4th.o
 	$(CC) $(CFLAGS) -I. -o $@ $@.o -L. -l4th
 
-4tsh: lib4th.a 4tsh.o
+4tsh: lib4th 4tsh.o
 	$(CC) $(CFLAGS) -I. -o $@ $@.o -L. -l4th
 
-4thc: lib4th.a 4thc.o
+4thc: lib4th 4thc.o
 	$(CC) $(CFLAGS) -I. -o $@ $@.o -L. -l4th
 
-4thd: lib4th.a 4thd.o
+4thd: lib4th 4thd.o
 	$(CC) $(CFLAGS) -I. -o $@ $@.o -L. -l4th
 
-4thx: lib4th.a 4thx.o
+4thx: lib4th 4thx.o
 	$(CC) $(CFLAGS) -I. -o $@ $@.o -L. -l4th
 
-4thg: lib4th.a 4thg.o
+4thg: lib4th 4thg.o
 	$(CC) $(CFLAGS) -I. -o $@ $@.o -L. -l4th
 
 mostlyclean:
 	-rm *.o 4th 4tsh # 4th?
 
 clean: mostlyclean
-	-rm lib4th.a
+	-rm -f lib4th.{a,so*}
 
 # Superuser privileges will probably be required for the rest
 
 install: all
-	cp lib4th.a $(LIBRARIES)
+	cp $(SHARED_LIB) $(STATIC_LIB) $(LIBRARIES)
+ifdef SHARED
+	ln -sf $(SHARED_LIB) $(LIBRARIES)/lib4th.so.$(MAJOR)
+	ln -sf $(SHARED_LIB) $(LIBRARIES)/lib4th.so
+endif
 	cp 4th 4tsh $(BINARIES)
 
 uninstall:
-	-rm $(LIBRARIES)/lib4th.a
+	-rm -f $(LIBRARIES)/lib4th.{a,so*}
 	-rm $(BINARIES)/4th $(BINARIES)/4tsh # $(BINARIES)/4thc $(BINARIES)/4thd $(BINARIES)/4thx $(BINARIES)/4thg
 
 .SUFFIXES: