# Makefile.in
# this is the Makefile for the Elkhound-based C Parser

# main target: an Elkhound-based C parser
all: cparse

# directories of other software
SMBASE   := @SMBASE@
AST      := @AST@
ELKHOUND := @ELKHOUND@

# stuff inside those other directories
LIBSMBASE   := $(SMBASE)/libsmbase.a
LIBAST      := $(AST)/libast.a
LIBELKHOUND := $(ELKHOUND)/libelkhound.a


# re-create the Makefile if Makefile.in has changed
Makefile: Makefile.in
	./config.status


# ----------------------- compiler configuration -------------------
# C++ preprocessor, compiler and linker
CXX := @CXX@

# flags for the C++ compiler (and preprocessor)
CCFLAGS := @CCFLAGS@ -I$(SMBASE) -I$(AST) -I$(ELKHOUND)

# flags for the linker
libraries := $(LIBELKHOUND) $(LIBAST) $(LIBSMBASE)
LDFLAGS := -g -Wall $(libraries)


# compile .cc in this directory to a .o
%.o: %.cc
	$(CXX) -c -o $@ $< $(CCFLAGS)
	@perl $(SMBASE)/depend.pl -o $@ $< $(CCFLAGS) >$*.d


# ----------------------- lexer2 -------------------
# run flex on the lexer description
lexer1yy.cc: lexer1.lex lexer1.h
	flex lexer1.lex


# modules needed for lexer2 stand-alone
LEXER2_OBJS := \
  lexer1.o \
  lexer1yy.o \
  cc_lang.o

# lexer2 stand-alone binary
lexer2: lexer2.cc lexer2.h $(LEXER2_OBJS)
	$(CXX) -o $@ -DTEST_LEXER2 $(CCFLAGS) lexer2.cc $(LEXER2_OBJS) $(LDFLAGS)


# ------------------------- cparse ---------------------
# run lexer2 stand-alone to generate token list
c.tok: lexer2
	./lexer2 -myparser >$@

# run astgen to generate the AST implementation
c.ast.gen.h c.ast.gen.cc: c.ast
	$(AST)/astgen -oc.ast.gen c.ast


# run elkhound to generate the parser
c.gr.gen.h c.gr.gen.cc c.gr.gen.y: c.gr c.tok
	$(ELKHOUND)/elkhound -tr bison -v -o c.gr.gen c.gr


# list of modules needed for the parser
CPARSE_OBJS := \
  lexer1.o \
  lexer1yy.o \
  cc_lang.o \
  lexer2.o \
  parssppt.o \
  c.ast.gen.o \
  c_env.o \
  cc_flags.o \
  c_type.o \
  cparse.o \
  exprequal.o \
  exprvisit.o \
  paths.o \
  postorder.o \
  stubs.o \
  tcheck.o \
  treeout.o \
  c_variable.o \
  c.gr.gen.o \
  main.o

# parser binary
cparse: $(CPARSE_OBJS)
	$(CXX) -o $@ $(CPARSE_OBJS) $(LDFLAGS)
	./$@ $(ELKHOUND)/c.in/c.in1


# ----------------------- bcparse ---------------------
# NOTE: This target ('bcparse') is not built by default because
# I don't want the default build to require Bison.

# bison parser from the same grammar; the 'sed' is because Bison
# already interpretes 0 as EOF, and if my rule names it explicitly
# then it gets mad
bcparse.y: c.gr.gen.y
	echo '%{' >$@
	echo '#include "bcparse.h"' >>$@
	echo '%}' >>$@
	sed -e 's/File L2_EOF/File/' <c.gr.gen.y >>$@

# run Bison; the 'sed' command is to silence a spurious warning about
# 'yyval' being used uninitialized; I also compile here (instead of
# relying on another pattern rule) because I want to control exactly
# how the compilation happens (to ensure the Bison-parser is compiled
# with flags to make it a fair performance test with my own stuff)
%.tab.c %.tab.o %.tab.h: %.y
	bison -d -v $*.y
	mv $*.tab.c $*.tab.c.orig
	sed -e 's/YYSTYPE yyval;/YYSTYPE yyval = 0;/' \
	    -e 's/__attribute__ ((__unused__))//' \
	  <$*.tab.c.orig >$*.tab.c
	rm $*.tab.c.orig
	$(CXX) -c -g -o $*.tab.o -O2 -DNDEBUG -Wall $(YYDEBUG) $*.tab.c

# C-without-typedefs parser, using Bison
bcparse-deps := bcparse.cc bcparse.tab.o lexer1.o lexer1yy.o lexer2.o cc_lang.o
bcparse: $(bcparse-deps) $(libraries)
	$(CXX) -o $@ $(CCFLAGS) $(bcparse-deps) $(LDFLAGS)
	./$@ $(ELKHOUND)/c.in/c.in1


# -------------------- clean, etc. -------------------
clean:
	rm -f *.o *.d *.gen.* *.tab.* *.output a.out core
	rm -f bcparse.y c.tok
	rm -f lexer2 cparse bcparse

distclean: clean
	rm -f Makefile config.status config.summary

toolclean: clean
	rm -f lexer1yy.cc

check:
	@echo "The C parser doesn't have an independent 'make check'."
