(Message inbox:40)
Date:  	Sat, 30 Jun 90 20:55:22 EDT
From:  Russell Herman <rwh@me.utoronto.ca>
Subject:  Re: flex release 2.3
To:  vern@cs.cornell.edu
Newsgroups:  comp.sources.d
Organization:  none

Kudos on the latest version of Flex.  It was a pleasant surprise to get
a piece of code, push it through a PC compiler, and not get a tonne of
warning messages.  However, it was also an unpleasant unsurprise to
discover that it didn't work due to Microsoft's perpetually buggy
compilers.  Here's a Makefile for one that finally did work; at least,
it ran the test case.  Any idea of a good source to really learn about
the lex/yacc class of tools?

Russ Herman
INTERNET: rwh@me.utoronto.ca  UUCP: ..uunet!utai!me!rwh

============================================================================
# make file for "flex" tool using MSC6 and nmk, derived from
# @(#) $Header: Makefile,v 2.3 89/06/20 17:27:12 vern Exp $ (LBL)
# by rwh@me.utoronto.ca

# **********************************************************************
#	Change SKELETON_FILE and SKELETON DIR to reflect your layout
#	You may also have to add a
#		#define register
#	to flexdef.h - I (rwh) did
# **********************************************************************

# the first time around use "make first_flex" if scan.c absent


YACC=yacc
SKELETON_DIR = e:\\includes
SKELETON_FILE = flexskel.h
SKELFLAGS = -DDEFAULT_SKELETON_FILE=\"$(SKELETON_DIR)\\$(SKELETON_FILE)\"
# Use next flag set for debugging
# CFLAGS =  /AL /DMSC6 /Gt768 /Od /Zi
# /Ox blows up with R6001/R6000 on test case, so fall back some opt-levels
CFLAGS =  /AC /DMSC6 /Gt768 /Oitc
LDFLAGS = /noi /cp:1 /stack:8192

#this null definition prevents a returned error code
MFLAGS =

FLEX_FLAGS =
FLEX = flex
CC = cl

# break obj-list into two because of 128 character command-line limit of
# Microsoft's link and lib utilities.
FLEXOBJS1 = ccl.obj dfa.obj ecs.obj gen.obj main.obj misc.obj nfa.obj parse.obj
FLEXOBJS2 = scan.obj sym.obj tblcmp.obj yylex.obj

FLEX_C_SOURCES = \
	ccl.c \
	dfa.c \
	ecs.c \
	gen.c \
	main.c \
	misc.c \
	nfa.c \
	parse.c \
	scan.c \
	sym.c \
	tblcmp.c \
	yylex.c

# lib is used to get around the 128 character command-line limit of 'link'.
flex.exe: tmplib.lib $(FLEXOBJS2)
	link $(LDFLAGS) $(FLEXOBJS2),$*.exe,,tmplib;
# Use next line for Codeview
#	link $(LDFLAGS) $(FLEXOBJS2),$*.exe,,tmplib /CO;
	-del  tmplib.lib

tmplib.lib: $(FLEXOBJS1)
	lib tmplib $(FLEXOBJS1);

# the second 'make flex.exe' causes scan.l to be RE-flexed.  The resulting
# scan.c is different from initscan.c in that \r\n are added instead of
# just \n.  Since \r\n is DOS language and this is targetted for PCs, and
# since I don't know what would happen for all cases in DOS-land, I went
# ahead and did it.
first_flex:
	copy initscan.c scan.c
	nmk $(MFLAGS) -f makefile.dos flex.exe
	-del scan.c
	nmk -f makefile.dos flex.exe

parse.obj: parse.c parse.h

parse.h parse.c : parse.y
	$(YACC) -d parse.y
	@mv ytab.c parse.c
	@mv ytab.h parse.h

scan.c : scan.l
	$(FLEX) -ist8 $(FLEX_FLAGS) scan.l > scan.c

scan.obj : scan.c parse.h

main.obj : main.c
	$(CC) -c $(CFLAGS) $(SKELFLAGS) main.c

###################
#
# If you have MKS utilities, or other DIFFer
test :
	$(FLEX) -ist8 $(FLEX_FLAGS) scan.l > scan.tst
# Use next line for Codeview
#	cvexe /S /B /X $(FLEX) -ist8 $(FLEX_FLAGS) scan.l > scan.tst
	diff -b scan.c scan.tst
#	-del scan.tst