Merge devo/bfd with GDB's bfd.

[deliverable/binutils-gdb.git] / gdb / Makefile.dist

##Copyright (C) 1989-1991 Free Software Foundation, Inc.

# This file is part of GDB.

# GDB is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 1, or (at your option)
# any later version.

# GDB is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with GDB; see the file COPYING.  If not, write to
# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

# Place to install binaries. 
bindir=/usr/local/bin

# System V: If you compile gdb with a compiler which uses the coff
# encapsulation feature (this is a function of the compiler used, NOT
# of the m-?.h file selected by config.gdb), you must make sure that
# the GNU nm is the one that is used by munch.

# If you are compiling with GCC, make sure that either 1) You use the
# -traditional flag, or 2) You have the fixed include files where GCC
# can reach them.  Otherwise the ioctl calls in inflow.c and readline.c 
# will be incorrectly compiled.  The "fixincludes" script in the gcc
# distribution will fix your include files up.
#CC=cc
#CC=gcc -traditional
GCC=gcc

VPATH=$(srcdir)

# It is also possible that you will need to add -I/usr/include/sys to the
# CFLAGS section if your system doesn't have fcntl.h in /usr/include (which 
# is where it should be according to Posix).

YACC=bison -y
# YACC=yacc
SHELL=/bin/sh
MAKE=make

# Set this up with gcc if you have gnu ld and the loader will print out
# line numbers for undefinded refs.
#CC-LD=gcc -static
CC-LD=${CC}

# define this to be "gmalloc.o" if you want to use the gnu malloc routine
# (useful for debugging memory allocation problems in gdb).  To use your
# system malloc, uncomment the following two lines.
#GNU_MALLOC =
#MALLOC_CFLAGS = -DNO_MALLOC_CHECK
GNU_MALLOC = gmalloc.o mcheck.o mtrace.o
MALLOC_CFLAGS =

# Where is the "include" directory?  Traditionally ../include or ./include
INCLUDE_DIR =  ${srcdir}/../include
INCLUDE_DEP = $$(INCLUDE_DIR)

# Where is the BFD library?  Traditionally ../bfd or ./bfd
BFD_DIR =  ${srcdir}/../bfd
BFD_DEP = $$(BFD_DIR)

# All the includes used for CFLAGS and for lint.
# -I. for config files.
# -I${srcdir} for <obstack.h>, possibly regex.h also.
INCLUDE_CFLAGS = -I. -I${srcdir} -I$(INCLUDE_DIR) -I${srcdir}/vx-share

# {X,T}M_CFLAGS, if defined, has system-dependent CFLAGS.
# CFLAGS for both GDB and readline.
GLOBAL_CFLAGS = -g ${TM_CFLAGS} ${XM_CFLAGS}
#PROFILE_CFLAGS = -pg

CFLAGS = ${GLOBAL_CFLAGS} ${PROFILE_CFLAGS} ${MALLOC_CFLAGS} ${INCLUDE_CFLAGS}
# None of the things in CFLAGS will do any harm, and on some systems
#  (e.g. SunOS4) it is important to use the M_CFLAGS.
LDFLAGS = $(CFLAGS)

# define this to be "obstack.o" if you don't have the obstack library installed
# so that the dependencies work right.  
OBSTACK = obstack.o

# Requires GNU getopt_long features.
GETOPT = getopt.o getopt1.o
# Where is the getopt directory?  Traditionally ../getopt or ./getopt
GETOPT_DIR =  ${srcdir}/../getopt
GETOPT_DEP = $$(GETOPT_DIR)

# Flags that describe where you can find the termcap library.
# You may need to make other arrangements for USG.
TERMCAP = -ltermcap

# You must define REGEX and REGEX1 on USG machines.
# If your sysyem is missing alloca(), or, more likely, it's there but
# it doesn't work, define ALLOCA & ALLOCA1

# {X,T}M_CLIBS, if defined, has system-dependent libs
# For example, -lPW for System V to get alloca().
# FIXME STOPGAP FOR BFD LIBRARY: BFD stuff
CLIBS = ${TERMCAP} $(XM_CLIBS) ${TM_CLIBS} ${BFD_DIR}/libbfd.a
CDEPS = ${XM_CDEPS} ${TM_CDEPS} ${BFD_DIR}/libbfd.a

ADD_FILES = ${OBSTACK} ${REGEX} ${ALLOCA} ${GNU_MALLOC} ${GETOPT}
ADD_DEPS = ${OBSTACK} ${REGEX1} ${ALLOCA1} ${GNU_MALLOC} ${GETOPT}

VERSION = 3.94.3
DIST=gdb-$(VERSION)

LINT=/usr/5bin/lint
LINTFLAGS=

# Source files in the main directory.
# Files which are included via a tconfig/* or xconfig/* file 
# should *not* be specified here; they're in "ALLDEPFILES".
SFILES_MAINDIR = \
	 blockframe.c breakpoint.c command.c core.c \
	 environ.c eval.c expprint.c findvar.c infcmd.c inflow.c infrun.c \
	 main.c printcmd.c \
	 remote.c source.c stack.c symmisc.c symtab.c symfile.c \
	 utils.c valarith.c valops.c valprint.c values.c expread.y \
	 signame.c cplus-dem.c mem-break.c target.c inftarg.c \
	 dbxread.c coffread.c \
	 ieee-float.c 

# Source files in subdirectories (which will be handled separately by
#  'make gdb.tar.Z').
# Files which are included via a tconfig/* or xconfig/* file 
# should *not* be specified here; they're in "ALLDEPFILES".
SFILES_SUBDIR = \
	 ${srcdir}/vx-share/dbgRpcLib.h \
	 ${srcdir}/vx-share/ptrace.h \
	 ${srcdir}/vx-share/reg.h \
	 ${srcdir}/vx-share/vxTypes.h \
	 ${srcdir}/vx-share/vxWorks.h \
	 ${srcdir}/vx-share/wait.h \
	 ${srcdir}/vx-share/xdr_ld.h \
	 ${srcdir}/vx-share/xdr_ptrace.h \
	 ${srcdir}/vx-share/xdr_rdb.h \
	 ${srcdir}/vx-share/xdr_regs.h \
	 ${srcdir}/nindy-share/Makefile \
	 ${srcdir}/nindy-share/VERSION \
	 ${srcdir}/nindy-share/b.out.h \
	 ${srcdir}/nindy-share/block_io.h \
	 ${srcdir}/nindy-share/coff.h \
	 ${srcdir}/nindy-share/demux.h \
	 ${srcdir}/nindy-share/env.h \
	 ${srcdir}/nindy-share/stop.h \
	 ${srcdir}/nindy-share/ttycntl.h

# All source files that go into linking GDB, except config-specified files.
SFILES = $(SFILES_MAINDIR) $(SFILES_SUBDIR)

# All source files that lint should look at
LINTFILES = $(SFILES) expread.tab.c init.c

# Any additional files specified on these lines should also be added to
# the OTHERS = definition below, so they go in the tar files.
SFILES_STAND = $(SFILES) standalone.c
SFILES_KGDB  = $(SFILES) stuff.c kdb-start.c

# Header files that are not named in tconfig/* or xconfig/* go here.
HFILES=	breakpoint.h command.h defs.h environ.h \
	expression.h frame.h gdbcmd.h gdbcore.h \
	getpagesize.h ieee-float.h inferior.h param-no-tm.h param.h \
	signals.h signame.h symfile.h symtab.h \
	target.h tdesc.h terminal.h tm-68k.h tm-i960.h tm-sunos.h \
	value.h

OPCODES = pn-opcode.h np1-opcode.h sparc-opcode.h vax-opcode.h m68k-opcode.h \
	  ns32k-opcode.h convx-opcode.h pyr-opcode.h mips-opcode.h \
	  am29k-opcode.h

REMOTE_EXAMPLES = rem-m68k.shar rem-multi.shar

MALLOCSRC = gmalloc.c mcheck.c mtrace.c mtrace.awk \
	    ansidecl.h stdlib.h gmalloc.h stddef.h
GETOPTSRC = $(GETOPT_DIR)/getopt.c $(GETOPT_DIR)/getopt1.c

POSSLIBS_MAINDIR = obstack.h obstack.c regex.c regex.h alloca.c \
	$(MALLOCSRC)
POSSLIBS = $(POSSLIBS_MAINDIR) $(GETOPTSRC)

TESTS = testbpt.c testfun.c testrec.c testreg.c testregs.c

# tdesc-lib cannot be named simply tdesc, because if if it were GNU make
# would try to make it from tdesc.c.
# tdesc-lib removed from the list due to Motorola copyrights...gnu@cygnus.com
OTHERS = Makefile.dist depend alldeps.mak Makefile.sdir \
	 createtags munch config.gdb config.status \
	 ChangeLog ChangeLog-3.x \
	 README TODO TAGS WHATS.NEW \
	 gdb.texinfo gdbint.texinfo gdbrc.tex threecol.tex \
	.gdbinit COPYING expread.tab.c stab.def \
	 copying.c Projects Convex.notes copying.awk \
	 saber.suppress standalone.c stuff.c kdb-start.c \
	 hp-include # tests

DEPFILES= ${TDEPFILES} ${XDEPFILES}

SOURCES=$(SFILES) $(ALLDEPFILES)
TAGFILES = $(SOURCES) ${HFILES} ${OPCODES} ${ALLPARAM} ${POSSLIBS} 
TAGFILES_MAINDIR = $(SFILES_MAINDIR) $(ALLDEPFILES_MAINDIR) \
             ${HFILES} ${OPCODES} ${ALLPARAM} ${POSSLIBS_MAINDIR} 
TARFILES = ${TAGFILES_MAINDIR} ${OTHERS} ${REMOTE_EXAMPLES}

OBS = main.o blockframe.o breakpoint.o findvar.o stack.o source.o \
    values.o eval.o valops.o valarith.o valprint.o printcmd.o \
    symtab.o symfile.o symmisc.o infcmd.o infrun.o remote.o \
    command.o utils.o expread.o expprint.o environ.o version.o \
    copying.o $(DEPFILES) signame.o cplus-dem.o mem-break.o target.o \
    inftarg.o ieee-float.o putenv.o \
    dbxread.o coffread.o # mipsread.o

RAPP_OBS = rgdb.o rudp.o rserial.o serial.o udp.o $(XDEPFILES)

TSOBS = core.o inflow.o

NTSOBS = standalone.o

TSSTART = /lib/crt0.o

NTSSTART = kdb-start.o

RL_LIB = readline/libreadline.a
RL_LIB_DEP = $(RL_LIB)

# Prevent Sun make from putting in the machine type.  Setting
# TARGET_ARCH to nothing works for SunOS 3, 4.0, but not for 4.1.
.c.o:
	${CC} -c ${CFLAGS} $<

all: gdb

install: gdb
	cp gdb $(bindir)/gdb.new
	mv $(bindir)/gdb.new $(bindir)/gdb
	$(M_INSTALL)

init.c: $(srcdir)/munch $(MUNCH_DEFINE) $(OBS) $(TSOBS)
	$(srcdir)/munch ${MUNCH_DEFINE} $(OBS) $(TSOBS) > init.c

gdb: $(OBS) $(TSOBS) ${ADD_DEPS} ${RL_LIB_DEP} ${CDEPS} init.o
	${CC-LD} $(LDFLAGS) -o gdb init.o $(OBS) $(TSOBS) $(ADD_FILES) \
	${RL_LIB} $(CLIBS)

saber_gdb: $(SFILES) $(GETOPTSRC) $(DEPFILES) copying.c obstack.c version.c
	#setopt load_flags $(CFLAGS) -I$(BFD_DIR)
	#load ./init.c $(SFILES)
	#unload ${srcdir}/expread.y
	#load ${srcdir}/expread.tab.c readline/libreadline.a
	#load copying.c version.c
	#load obstack.c $(GETOPTSRC)
	#load `echo " "$(DEPFILES) | sed -e 's/\.o/.c/g' -e 's, , ../,g'`
	#load ${BFD_DIR}/libbfd.a -ltermcap 
	##void mcheck(a) void (*a)(); { }



# This is useful when debugging GDB, because some Unix's don't let you run GDB
# on itself without copying the executable.  So "make gdb1" will make
# gdb and put a copy in gdb1, and you can run it with "gdb gdb1".
# Removing gdb1 before the copy is the right thing if gdb1 is open
# in another process.
gdb1: gdb
	rm -f gdb1
	cp gdb gdb1

# This is a remote stub which runs under unix and starts up an
# inferior process.  This is at least useful for debugging GDB's
# remote support.
rapp: $(RAPP_OBS)
	rm -f rapp_init.c
	${srcdir}/munch ${RAPP_OBS} > rapp_init.c
	${CC-LD} $(LDFLAGS) -o $@ rapp_init.c $(RAPP_OBS)
	
Makefiles= Makefile.sdir $(M_MAKEFILE) \
	${srcdir}/alldeps.mak ${srcdir}/Makefile.dist

MAKE_MAKEFILE= echo "M_MAKEFILE=$(M_MAKEFILE)" | \
	cat - ${Makefiles} ${srcdir}/depend >Makefile

Makefile: $(Makefiles)
	$(MAKE_MAKEFILE)

alldeps.mak: ${srcdir}/tconfig ${srcdir}/xconfig
	rm -f alldeps.mak alldeps.tmp allparam.tmp allconfig.tmp
	for i in `ls -d ${srcdir}/tconfig/*[0-9A-Za-z] \
          ${srcdir}/xconfig/*[0-9A-Za-z] | grep -v RCS` ; do \
	  echo $$i >>allconfig.tmp; \
	  awk <$$i ' \
	    $$1 == "TDEPFILES=" || $$1 == "XDEPFILES=" { \
	      for (i = 2; i <= NF; i++) \
	        print $$i >> "alldeps.tmp" ; \
            } \
	    $$1 == "TM_FILE=" || $$1 == "XM_FILE=" { \
	      print $$2 >> "allparam.tmp" }' ; \
	done
	sort <alldeps.tmp | uniq | \
	  sed -e 's/arm-convert.o/arm-convert.s/' \
	      -e 's!^Onindy.o!nindy-share/Onindy.c!' \
	      -e 's!^nindy.o!nindy-share/nindy.c!' \
	      -e 's!ttybreak.o!nindy-share/ttybreak.c!' \
	      -e 's!ttyflush.o!nindy-share/ttyflush.c!' \
	      -e 's!xdr_ld.o!vx-share/xdr_ld.c!' \
	      -e 's!xdr_ptrace.o!vx-share/xdr_ptrace.c!' \
	      -e 's!xdr_rdb.o!vx-share/xdr_rdb.c!' \
	      -e 's!xdr_regs.o!vx-share/xdr_regs.c!' \
	      -e 's/\.o/.c/' \
	    >alldeps2.tmp
	echo 'ALLDEPFILES = $$(ALLDEPFILES_MAINDIR) $$(ALLDEPFILES_SUBDIR)' \
	    >>alldeps.mak;
	grep -v / alldeps2.tmp | \
	  awk 'BEGIN {printf "ALLDEPFILES_MAINDIR="} \
	    NR == 0 {printf $$0;} \
	    NR != 0 {printf "\\\n" $$0} \
	    END {printf "\n\n"}' >>alldeps.mak;
	grep / alldeps2.tmp | \
	  awk 'BEGIN {printf "ALLDEPFILES_SUBDIR="} \
	    NR == 0 {printf $$0;} \
	    NR != 0 {printf "\\\n" $$0} \
	    END {printf "\n\n"}' >>alldeps.mak;
	sort <allparam.tmp | uniq | awk 'BEGIN {printf "ALLPARAM="} \
	    NR == 0 {printf $$0;} \
	    NR != 0 {printf "\\\n" $$0} \
	    END {printf "\n\n"}' >>alldeps.mak;
	sort <allconfig.tmp | uniq | awk 'BEGIN {printf "ALLCONFIG="} \
	    NR == 0 {printf $$0;} \
	    NR != 0 {printf "\\\n" $$0} \
	    END {printf "\n\n"}' >>alldeps.mak;
	rm -f alldeps.tmp alldeps2.tmp allparam.tmp allconfig.tmp

# The sed script makes everything which depends on {x,t}m.h depend on
# config.status as well, in case someone reconfigures gdb out from
# under an already compiled gdb.
depend: $(SOURCES) Makefile.dist
	@echo Ignore errors about non-existent system-supplied include files
	@echo for systems other than the one you are using.
	@echo "If xm.h and tm.h don't exist, the error messages saying so"
	@echo can safely be ignored.
	@echo Also ignore parse errors in valops.c, and any errors in
	@echo arm-convert.s.
	-$(GCC) -MM $(CFLAGS) -I$(BFD_DIR) \
	    `ls $(SOURCES) | sort -u` >depend.tmp
	<depend.tmp sed -e 's/ [xt]m.h/& config.status/g'  \
	  -e 's; vx-share/; $${srcdir}/vx-share/;g'  \
	  -e 's; nindy-share/; $${srcdir}/nindy-share/;g'  \
	  -e 's; $(INCLUDE_DIR)/; $(INCLUDE_DEP)/;g'  \
	  -e 's; [a-z0-9./]*bfd/; $(BFD_DEP)/;g'  \
	  -e 's; [a-z0-9./]*getopt/; $(GETOPT_DEP)/;g'  \
	  -e 's; \./; $${srcdir}/;g'  \
	  >depend
	$(MAKE_MAKEFILE)
	rm depend.tmp

config.status:
	@echo "You must configure gdb.  Look at the README file for details."
	@false

# These are not generated by "make depend" because they only are there
# for some machines.
# But these rules don't do what we want; we want to hack the foo.o: tm.h
# dependency to do the right thing.
tm-isi.h tm-sun3.h tm-news.h tm-hp300bsd.h tm-altos.h : tm-68k.h
tm-hp300hpux.h tm-sun2.h tm-3b1.h : tm-68k.h
xm-news1000.h : xm-news.h
xm-i386-sv32.h : xm-i386.h
tm-i386gas.h: tm-i386.h
xm-sun4os4.h : xm-sparc.h
tm-sun4os4.h : tm-sparc.h

kdb : $(NTSSTART) $(OBS) $(NTSOBS) ${ADD_DEPS} ${RL_LIB_DEP}
	rm -f init.c
	$(srcdir)/munch ${MUNCH_DEFINE} $(OBS) $(NTSOBS) > init.c
	$(CC) $(LDFLAGS) -c init.c $(CLIBS) 
	ld -o kdb $(NTSSTART) $(OBS) $(NTSOBS) init.o $(ADD_FILES) \
	${RL_LIB} -lc $(CLIBS)

# Put the proper machine-specific files first.
# createtags will edit the .o in DEPFILES into .c
TAGS: ${TAGFILES}
	$(srcdir)/createtags $(TM_FILE) ${XM_FILE} $(DEPFILES) ${TAGFILES}
tags: TAGS

# FIXME: Get alldeps.mak up to date, config.gdb none, THEN make gdb.tar.Z!
gdb.tar.Z: ${TARFILES}
	rm -f gdb.tar; rm -rf $(DIST)
	cd readline ; make readline.tar
	mkdir $(DIST)
	cd $(DIST) ; for i in ${TARFILES} ; do ln -s ../$$i . ; done
	mkdir $(DIST)/readline
	cd $(DIST)/readline ; tar xf ../../readline/readline.tar
	mkdir $(DIST)/xconfig ${DIST}/tconfig
	cd $(DIST)/tconfig ; \
	  for i in $(ALLCONFIG) ; do ln -s ../../$$i ../$$i ; done
	mkdir $(DIST)/vx-share $(DIST)/nindy-share
	cd $(DIST)/tconfig ; \
	  for i in $(SFILES_SUBDIR) $(ALLDEPFILES_SUBDIR); \
	    do ln -s ../../$$i ../$$i ; done
	tar chf - $(DIST) | compress >gdb.tar.Z
	rm -rf $(DIST)

clean:
	rm -f ${OBS} ${TSOBS} ${NTSOBS} ${ADD_FILES}
	rm -f init.c init.o version.c
	rm -f gdb core gdb.tar gdb.tar.Z make.log
	rm -f gdb[0-9]
	cd readline ; make clean

distclean: clean expread.tab.c TAGS
	rm -f tm.h xm.h config.status
	rm -f y.output yacc.acts yacc.tmp
	rm -f ${TESTS} Makefile

realclean: clean
	rm -f expread.tab.c TAGS
	rm -f tm.h xm.h config.status
	rm -f Makefile

gdb.dvi : gdb.texinfo
	tex gdb.texinfo
	texindex gdb.??
	tex gdb.texinfo

# Make copying.c from COPYING
copying.c : COPYING copying.awk
	awk -f copying.awk < COPYING > copying.c

version.c : Makefile.dist
	echo 'char *version = "$(VERSION)";' >version.c

${srcdir}/expread.tab.c : $(srcdir)/expread.y
	@echo 'Expect 4 shift/reduce conflict.'
	${YACC} $(srcdir)/expread.y
	mv y.tab.c ${srcdir}/expread.tab.c

expread.o : ${srcdir}/expread.tab.c defs.h param.h symtab.h \
            frame.h expression.h
	$(CC) -c ${CFLAGS} `echo ${srcdir}/expread.tab.c | sed 's,^\./,,'`
	mv expread.tab.o expread.o

# dbxread, coffread, mipsread have dependencies on BFD header files.
dbxread.o: ${srcdir}/dbxread.c
	${CC} -c ${CFLAGS} -I$(BFD_DIR) ${srcdir}/dbxread.c

coffread.o: ${srcdir}/coffread.c
	${CC} -c ${CFLAGS} -I$(BFD_DIR) ${srcdir}/coffread.c

mipsread.o: ${srcdir}/mipsread.c
	${CC} -c ${CFLAGS} -I$(BFD_DIR) ${srcdir}/mipsread.c

# Drag in the files that are in another directory.

getopt1.o: $(GETOPT_DIR)/getopt1.c
	${CC} -c ${CFLAGS} $(GETOPT_DIR)/getopt1.c

getopt.o: $(GETOPT_DIR)/getopt.c
	${CC} -c ${CFLAGS} $(GETOPT_DIR)/getopt.c

xdr_ld.o: ${srcdir}/vx-share/xdr_ld.c
	${CC} -c ${CFLAGS} ${srcdir}/vx-share/xdr_ld.c

xdr_ptrace.o: ${srcdir}/vx-share/xdr_ptrace.c
	${CC} -c ${CFLAGS} ${srcdir}/vx-share/xdr_ptrace.c

xdr_rdb.o: ${srcdir}/vx-share/xdr_rdb.c
	${CC} -c ${CFLAGS} ${srcdir}/vx-share/xdr_rdb.c

xdr_regs.o: ${srcdir}/vx-share/xdr_regs.c
	${CC} -c ${CFLAGS} ${srcdir}/vx-share/xdr_regs.c

nindy.o: ${srcdir}/nindy-share/nindy.c
	${CC} -c ${CFLAGS} ${srcdir}/nindy-share/nindy.c

Onindy.o: ${srcdir}/nindy-share/Onindy.c
	${CC} -c ${CFLAGS} ${srcdir}/nindy-share/Onindy.c

ttybreak.o: ${srcdir}/nindy-share/ttybreak.c
	${CC} -c ${CFLAGS} ${srcdir}/nindy-share/ttybreak.c

ttyflush.o: ${srcdir}/nindy-share/ttyflush.c
	${CC} -c ${CFLAGS} ${srcdir}/nindy-share/ttyflush.c

tdesc-lib/libdc.o : force_update
	cd tdesc-lib ; ${MAKE} "SYSV_DEFINE=${SYSV_DEFINE}"

# In LOCAL_INCLUDES, -I${srcdir} is right if srcdir is an absolute path,
# and -I../${srcdir} is right if it is relative (e.g. ".."), so search both.
readline/libreadline.a : force_update
	cd readline ; ${MAKE} "SYSV=${SYSV_DEFINE}"\
		"VPATH=${srcdir}/readline:../${srcdir}/readline"\
		"LOCAL_INCLUDES=-I../ -I${srcdir}/ -I../${srcdir}/"\
		"DEBUG_FLAGS=${GLOBAL_CFLAGS}" "CC=${CC}" libreadline.a

lint: $(LINTFILES)
	$(LINT) $(INCLUDE_CFLAGS) $(LINTFLAGS) $(LINTFILES)

gdb.cxref: $(SFILES)
	cxref -I. $(SFILES) >gdb.cxref

force_update :

# When used with GDB, the demangler should never look for leading underscores
# because GDB strips them off during symbol read-in.  Thus -Dnounderscore.
# Adding "param.h" gets us the USG define without having to edit cplus-dem.c
# (which is used by other programs which may or may not have a "param.h").
# (no newline is added, so line numbers still work right).
cplus-dem.o : cplus-dem.c
	sed <`echo ${srcdir}/cplus-dem.c | sed 's,^\./,,'` \
	  >cplus.tmp.c \
	  '1s,^,#include "param.h" ,'
	${CC} -c ${CFLAGS} -Dnounderscore cplus.tmp.c
	mv cplus.tmp.o cplus-dem.o