Dependencies of foo.$(OBJEXT) are not honoured when building a libtool
library; instead we need to use foo.lo.
cdecl99_SOURCES = src/cdecl99.c
cdecl99_LDADD = libcdecl.la
-src/parse.$(OBJEXT): src/scan.h
-src/scan.$(OBJEXT): src/parse.h
-src/libcdecl.$(OBJEXT): src/scan.h src/parse.h
+src/parse.lo: src/scan.h
+src/scan.lo: src/parse.h
+src/libcdecl.lo: src/scan.h src/parse.h
# These are required to prevent the builtin lex/yacc rules from
# superseding ours...