Add file/line information to entities and ports

Include the compiler infrastructure to vhdlpp for collecting the
file and line information and attaching it to entities and ports.
Make the parser store the file name during parse.

Create a libmisc library where I can put source files that are
used by multiple programs within the source tree.

vhdlpp/Makefile.in

@@ -40,9 +40,9 @@ LEX = @LEX@
 YACC = @YACC@
 
 ifeq (.,.)
-INCLUDE_PATH = -I. -I..
+INCLUDE_PATH = -I. -I.. -I../libmisc
 else
-INCLUDE_PATH = -I. -I.. -I$(srcdir) -I$(srcdir)/..
+INCLUDE_PATH = -I. -I.. -I$(srcdir) -I$(srcdir)/../libmisc
 endif
 
 CPPFLAGS = $(INCLUDE_PATH) @CPPFLAGS@ @DEFS@
@@ -51,8 +51,10 @@ CXXFLAGS = @WARNING_FLAGS@ @WARNING_FLAGS_CXX@ @CXXFLAGS@
 LDFLAGS = @LDFLAGS@
 LIBS = @LIBS@ @EXTRALIBS@
 
+M = StringHeap.o LineInfo.o
+
 O = main.o compiler.o entity.o entity_elaborate.o \
-    lexor.o lexor_keyword.o parse.o StringHeap.o
+    lexor.o lexor_keyword.o parse.o $M
 
 all: dep vhdlpp@EXEEXT@
 
@@ -73,6 +75,9 @@ dep:
 vhdlpp@EXEEXT@: $O
 	$(CXX) -o vhdlpp@EXEEXT@ $(LDFLAGS) $O $(LIBS)
 
+%.o: $(srcdir)/../libmisc/%.cc
+	$(CXX) $(CPPFLAGS) $(CXXFLAGS) @DEPENDENCY_FLAG@ -c $< -o $*.o
+
 %.o: %.cc vhdlpp_config.h
 	$(CXX) $(CPPFLAGS) $(CXXFLAGS) @DEPENDENCY_FLAG@ -c $< -o $*.o
 	mv $*.d dep/$*.d