2 A <unistd.h> for systems lacking it.
13 BUILT_SOURCES += $(UNISTD_H)
15 # We need the following in order to create an empty placeholder for
16 # <unistd.h> when the system doesn't have one.
18 echo '/* Empty placeholder for $@. */' >$@
19 MOSTLYCLEANFILES += unistd.h