gcc problems with HP-UX 10.2

["Coutu, Alain Capt (CF) NSSF/SCOA" <Alain dot Coutu at 1staf dot tyndall dot af dot mil>]

We are trying to compile an application of over 2500 files using gcc on
HP-UX 10.2.  The application was formerly compiled under HP-UX 9.03 using
the HP ANSI C compiler.  The application several Makefiles and when I run
the master makefile I get the following error for all the files being
compiled: cc: cannot specify -o with -c or -S and multiple compilations.
However, when I instantiate a specific Makefile from its directory, it
compile fine.  As soon as I instantiate the parent Makefile, it return the
error mentioned above.  I read through the archive similar problems
encountered using Linux.  Can someone help. 

An example of a parent Makefile is as follows:

#
#	This is a makefile to build the source files of mpl
#
#
SHELL	=	/bin/csh

QUE	=	$(SYSSRC)/mdp/src/mpl/queue
QKER	=	$(SYSSRC)/mdp/src/mpl/que_kernel
SHM	=	$(SYSSRC)/mdp/src/mpl/shm
LOCK	=	$(SYSSRC)/mdp/src/mpl/lock
MPS	=	$(SYSSRC)/mdp/src/mpl/mps
CFP	=	$(SYSSRC)/mdp/src/mpl/cf_parse
VAL	=	$(SYSSRC)/mdp/src/mpl/val
ICZ	=	$(SYSSRC)/mdp/src/mpl/icz_libscs
ERR	=	$(SYSSRC)/mdp/src/mpl/mpe_error_lib
EXEC	=	$(SYSSRC)/mdp/src/mpl/mpe_exec_lib
SIM	=	$(SYSSRC)/mdp/src/mpl/sim_comm
OPTS	=	$(SYSSRC)/mdp/mdp_options

all:		compile

erase:
	@echo Cleanup $(QUE);  rm -f $(QUE)/*.o;  rm -f $(QUE)/core;
	@echo Cleanup $(QKER); rm -f $(QKER)/*.o; rm -f $(QKER)/core;
	@echo Cleanup $(SHM);  rm -f $(SHM)/*.o;  rm -f $(SHM)/core;
	@echo Cleanup $(LOCK); rm -f $(LOCK)/*.o; rm -f $(LOCK)/core;
	@echo Cleanup $(MPS);  rm -f $(MPS)/*.o;  rm -f $(MPS)/core;
	@echo Cleanup $(CFP);  rm -f $(CFP)/*.o;  rm -f $(CFP)/core;
	@echo Cleanup $(VAL);  rm -f $(VAL)/*.o;  rm -f $(VAL)/core;
	@echo Cleanup $(ICZ);  rm -f $(ICZ)/*.o;  rm -f $(ICZ)/core;
	@echo Cleanup $(ERR);  rm -f $(ERR)/*.o;  rm -f $(ERR)/core;
	@echo Cleanup $(EXEC); rm -f $(EXEC)/*.o; rm -f $(EXEC)/core;
	@echo Cleanup $(SIM);  rm -f $(SIM)/*.o;  rm -f $(SIM)/core;

compile:
	@source $(OPTS); make -if $(QUE)/Makefile all
	@source $(OPTS); make -if $(QKER)/Makefile all
	@source $(OPTS); make -if $(SHM)/Makefile all
	@source $(OPTS); make -if $(LOCK)/Makefile all
	@source $(OPTS); make -if $(MPS)/Makefile all
	@source $(OPTS); make -if $(CFP)/Makefile all
	@source $(OPTS); make -if $(VAL)/Makefile all
	@source $(OPTS); make -if $(ICZ)/Makefile all
	@source $(OPTS); make -if $(ERR)/Makefile all
	@source $(OPTS); make -if $(EXEC)/Makefile all
	@source $(OPTS); make -if $(SIM)/Makefile all

 An example of a specific Makefile is as follows for the directory
$(SYSSRC)/mdp/src/mpl/queue of the parent Makefile above :

#
#	Define the object files for the queue routines.
#
QUE_DIR  =	$(SYSSRC)/mdp/src/mpl/queue

QUE_OBJS =	$(QUE_DIR)/L81_create_q.o 	\
		$(QUE_DIR)/L82_delete_q.o 	\
		$(QUE_DIR)/L83_delete_all.o 	\
		$(QUE_DIR)/L87_q_status.o 	\
		$(QUE_DIR)/L89a_enqueue.o 	\
		$(QUE_DIR)/L89b_dequeue.o

DPATH	 =	$(SYSMDP)/TOOLS

LPATH	 =	$(SYSSRC)/mdp/lib
LPATH2	 =	$(SYSSRC)/mdp/lib
QUE_LIB	 =	$(LPATH)/L8_queue_lib.a


IPATH	 =	-I$(SYSSRC)/mdp/inc
DFLAGS	 =	$(MDP_DFLAGS)
CFLAGS	 =	$(MDP_CFLAGS) $(DFLAGS) $(IPATH)


.SUFFIXES:	.o .c

.c.o:	
	@echo Compiling $*.c ...; cc $(CFLAGS) -c $*.c -o $*.o

all:	QUELIB

QUELIB:	$(QUE_OBJS)
	@rm -f $(QUE_LIB)
	@echo Building $(QUE_LIB); \
	ar r $(QUE_LIB) $(QUE_OBJS);


Alain Coutu