vhdlpp: update make clean and vpath, add cppcheck target

This patch updates the make clean target and modifies the vpath search to
match what is done in the main ivl Makefile since this one has the same
issues it does. It also adds a cppcheck target and removes the redundant
libmisc build target since the vpath already handles this.

vhdlpp/Makefile.in

@@ -24,7 +24,13 @@ prefix = @prefix@
 exec_prefix = @exec_prefix@
 srcdir = @srcdir@
 
-VPATH = $(srcdir)
+# Look in the appropriate source directory for the C++ files. The one
+# exception to this is if we need to rebuild the lexor_keyword.cc file.
+# If we do, then we want to use the local version instead of the one is
+# $(srcdir).
+vpath lexor_keyword.cc .
+vpath %.cc $(srcdir)/../libmisc
+vpath %.cc $(srcdir)
 
 bindir = @bindir@
 libdir = @libdir@
@@ -61,13 +67,16 @@ all: dep vhdlpp@EXEEXT@
 check: all
 
 clean:
-	rm -f *.o *~
+	rm -f *.o *~ parse.cc parse.h lexor.cc parse.output lexor_keyword.cc
 	rm -rf dep vhdlpp@EXEEXT@
 
 distclean: clean
 	rm -f Makefile config.log
 	rm -f stamp-vhdlpp_config-h vhdlpp_config.h
 
+cppcheck: $(O:.o=.cc)
+	cppcheck --enable=all -f $(INCLUDE_PATH) $^
+
 Makefile: $(srcdir)/Makefile.in
 	cd ..; ./config.status --file=vhdlpp/$@
 
@@ -77,10 +86,6 @@ dep:
 vhdlpp@EXEEXT@: $O
 	$(CXX) -o vhdlpp@EXEEXT@ $(LDFLAGS) $O $(LIBS)
 
-%.o: $(srcdir)/../libmisc/%.cc
-	$(CXX) $(CPPFLAGS) $(CXXFLAGS) @DEPENDENCY_FLAG@ -c $< -o $*.o
-	mv $*.d dep/$*.d
-
 %.o: %.cc vhdlpp_config.h
 	$(CXX) $(CPPFLAGS) $(CXXFLAGS) @DEPENDENCY_FLAG@ -c $< -o $*.o
 	mv $*.d dep/$*.d