Lines of Makefile from check-in 3e44e1def1 that are changed by the sequence of edits moving toward check-in 88f96696b7:

3e44e1def1 2019-05-02    1: CPPFLAGS := -I. -DUSE_TCL_STUBS=1 -DXVFS_MODE_STANDALONE
                         2: CFLAGS   := -fPIC -g3 -ggdb3 -Wall
                         3: LDFLAGS  :=
3e44e1def1 2019-05-02    4: LIBS     := -ltclstub8.6
                         5: 
                         6: all: example.so
                         7: 
                         8: example.c: $(shell find example -type f) $(shell find lib -type f) xvfs.c.rvt xvfs-create Makefile
                         9: 	./xvfs-create --directory example --name example > example.c.new
                        10: 	mv example.c.new example.c
                        11: 
                        12: example.o: example.c xvfs-core.h Makefile
                        13: 	$(CC) $(CPPFLAGS) $(CFLAGS) -o example.o -c example.c
                        14: 
                        15: xvfs-core.o: xvfs-core.c xvfs-core.h Makefile
                        16: 	$(CC) $(CPPFLAGS) $(CFLAGS) -o xvfs-core.o -c xvfs-core.c
                        17: 
                        18: example.so: example.o xvfs-core.o Makefile
                        19: 	$(CC) $(CFLAGS) $(LDFLAGS) -shared -o example.so example.o xvfs-core.o $(LIBS)
                        20: 
                        21: test: example.so
                        22: 	echo 'if {[catch { load ./example.so Xvfs_example; source //xvfs:/example/main.tcl }]} { puts stderr $$::errorInfo; exit 1 }; exit 0' | tclsh
                        23: 
                        24: clean:
                        25: 	rm -f example.so example.o example.c
                        26: 	rm -f xvfs-core.o
                        27: 
                        28: distclean: clean
                        29: 
                        30: .PHONY: all clean distclean test