Fortran Makefile with 2 executables - makefile

Question

I'm trying to compile 2 F90 files and to execute each one separately using a Makefile. The language used is fortran. I am not used to this so I need your help.
The first file is called HECESE_avec_modif.f90 and the second one is called hecese_seq.f90.
The makefile is below :
# Define dependance for suffix .FFREE
# -----------------------------------
.SUFFIXES: .exe .out .o .f .f90
#
# Compilation options for ifort
# ---------------------------------
# ---------------------------------
#FLAGS_fred = -free -O2 -traceback -mcmodel=large\
# -check overflow -check bounds
#FLAGS_fred = -FR -free -ftz -O3 -fPIC
#F90_COMPILER = /opt/intel/bin/ifort
#---------------------------------------------------------
#
# Compilation options for G95
#
#FLAGS_fred = -C -O3 -ffree-form -ffree-line-length-huge -fzero
#FLAGS_fred = -O5 -ffree-form -ffree-line-length-huge -fzero
#F90_COMPILER = g95
#
# Compilation options for GFortran
FLAGS_fred = -ffree-form -ffree-line-length-none -O3 #-march=native
F90_COMPILER = gfortran -m64
F90_COMPILER7 = gfortran-7 -m64
#FLAGS_fred = -O3
#F90_COMPILER = gfortran
#FLAGS_CPPFOR = -L/usr/local/gfortran/lib/x86_64/
#
#
#FLAGS_fred = -free -O4
#
#
# ***************************************************
# ***************************************************
# ** **
# ** definition of file groups for F. Waymel **
# ** **
# ***************************************************
# ***************************************************
#
# 0.) group of all modules containing common variables
# for multiblocs initialisation
# ----------------------------------------------------
#
MAIN = HECESE_avec_modif.f90
MAIN2 = hecese_seq.f90
#
# Compilation of object files :
# -----------------------------
#
MAIN_OBJ =$(MAIN:.f90=.o)
MAIN_OBJ2 =$(MAIN2:.f90=.o)
# Creation of executable:
# ---------------------------------
#
#DEST1 = ~/bin
EXEC = hecesevfinale.out
EXEC2 = heceseseq.out
all : $(EXEC) $(EXEC2)
$(EXEC):$(MAIN_OBJ)
$(F90_COMPILER) -g $(FLAGS_fred) -o $(EXEC) $(MAIN_OBJ)
$(EXEC2):$(MAIN_OBJ2)
$(F90_COMPILER) -g $(FLAGS_fred) -o $(EXEC2) $(MAIN_OBJ2)
#
%.o : %.mod
.f90.o:
$(F90_COMPILER) -g $(FLAGS_fred) -c $<
# $(F90_COMPILER) -g $(FLAGS_fred) -c $<
%.o : %.mod
.f90.o:
$(F90_COMPILER) -g $(FLAGS_fred) -c $<
# $(F90_COMPILER) -g $(FLAGS_fred) -c $<
clean:
rm -f *.o *.mod *.out
#depend .depend:
# makedepf90 metas.f90 $(SOURCES90_fred1) $(SOURCES90_fred2) $(SOURCES90_mwl) $(SOURCES90_mwl2) > .depend
#include .depend
I think that I made a mistake related to the second file.
The message I get when I execute this makefile is :
gfortran -m64 -g -ffree-form -ffree-line-length-none -O3 -o hecesevfinale.out HECESE_avec_modif.o
make: *** No rule to make target 'hecese_seq.o', needed by 'heceseseq.out'. Stop.
I have another problem when I try to execute make clean.
I get :
makefile:82: warning: overriding recipe for target '.f90.o'
makefile:76: warning: ignoring old recipe for target '.f90.o'
Can you help me, please ?