diff -Nurd -x'*~' stfl-0.24.orig/Makefile stfl-0.24/Makefile
--- stfl-0.24.orig/Makefile	2015-02-12 08:14:33.000000000 -0500
+++ stfl-0.24/Makefile	2016-07-28 04:43:33.000000000 -0400
@@ -20,14 +20,14 @@
 
 include Makefile.cfg
 
-export CC = gcc -pthread
-export CFLAGS += -I. -Wall -Os -ggdb -D_GNU_SOURCE -fPIC
-export LDLIBS += -lncursesw
+export CFLAGS += -I. -Wall -Os -ggdb -D_GNU_SOURCE -fPIC $(CPPFLAGS)
+export LDLIBS += $(LDFLAGS) -lncursesw -liconv
 
-SONAME  := libstfl.so.0
+SHLIBEXT:= dylib
+SOEXT   := 0.$(SHLIBEXT)
 VERSION := 0.24
 
-all: libstfl.so.$(VERSION) libstfl.a example
+all: libstfl.$(SOEXT) libstfl.a example
 
 example: libstfl.a example.o
 
@@ -37,9 +37,9 @@
 	ar qc $@ $^
 	ranlib $@
 
-libstfl.so.$(VERSION): public.o base.o parser.o dump.o style.o binding.o iconv.o \
+libstfl.$(SOEXT): public.o base.o parser.o dump.o style.o binding.o iconv.o \
                        $(patsubst %.c,%.o,$(wildcard widgets/*.c))
-	$(CC) -shared -Wl,-soname,$(SONAME) -o $@ $(LDLIBS) $^
+	$(CC) -dynamiclib -install_name $(prefix)/lib/libstfl.$(SOEXT) -o $@ $(LDLIBS) $^
 
 clean:
 	rm -f libstfl.a example core core.* *.o Makefile.deps
@@ -50,11 +50,11 @@
 	rm -f python/stfl_wrap.c python/stfl_wrap.o
 	rm -f ruby/Makefile ruby/stfl_wrap.c ruby/stfl_wrap.o
 	rm -f ruby/stfl.so ruby/build_ok Makefile.deps_new
-	rm -f stfl.pc libstfl.so libstfl.so.*
+	rm -f stfl.pc libstfl.so libstfl.$(SOEXT)
 
 Makefile.deps: *.c widgets/*.c *.h
-	$(CC) -I. -MM *.c > Makefile.deps_new
-	$(CC) -I. -MM widgets/*.c | sed 's,^wt_[^ ]*\.o: ,widgets/&,' >> Makefile.deps_new
+	$(CC) $(CFLAGS) -MM *.c > Makefile.deps_new
+	$(CC) $(CFLAGS) -MM widgets/*.c | sed 's,^wt_[^ ]*\.o: ,widgets/&,' >> Makefile.deps_new
 	mv -f Makefile.deps_new Makefile.deps
 
 install: all stfl.pc
@@ -63,8 +63,8 @@
 	install -m 644 libstfl.a $(DESTDIR)$(prefix)/$(libdir)
 	install -m 644 stfl.h $(DESTDIR)$(prefix)/include/
 	install -m 644 stfl.pc $(DESTDIR)$(prefix)/$(libdir)/pkgconfig/
-	install -m 644 libstfl.so.$(VERSION) $(DESTDIR)$(prefix)/$(libdir)
-	ln -fs libstfl.so.$(VERSION) $(DESTDIR)$(prefix)/$(libdir)/libstfl.so
+	install -m 644 libstfl.$(SOEXT) $(DESTDIR)$(prefix)/$(libdir)
+	ln -fs libstfl.$(SOEXT) $(DESTDIR)$(prefix)/$(libdir)/libstfl.$(SHLIBEXT)
 
 stfl.pc: stfl.pc.in
 	sed 's,@VERSION@,$(VERSION),g' < $< | sed 's,@PREFIX@,$(prefix),g' > $@