################################
##### makefile definitions #####
################################
include Makefile.inc
# global source files directory
SRC_DIR  := ./
# binary files directory
BIN_DIR  := bin
# local source files directory
SRC_DIRS := $(shell find $(SRC_DIR) -type d)

# main source, object, and executable files
MAIN_SRC             := working_ex

MAIN_OBJ             := $(foreach program,$(MAIN_SRC),$(program).o)
MAIN_OBJ_FINAL       := $(patsubst %.o,$(BIN_DIR)/%.o,$(MAIN_OBJ))
MAIN_EXE             := main

# initialize c preprocessor flags
CPPFLAGS := -cpp
# set fortran compiler/linker
ifeq ($(compile_link),1)
    FC := gfortran
    FL := gfortran
else ifeq ($(compile_link),2)
    FC := $(MPIDIR)/bin/mpif90
    FL := $(MPIDIR)/bin/mpif90
else ifeq ($(compile_link),3)
    FC := $(TACC_IMPI_BIN)/mpiifort
    FL := $(TACC_IMPI_BIN)/mpiifort
endif
# set gfortran-specific compiler flags
# for info on -march=native, run `gcc -march=native -v -Q --help=target`
ifeq ($(compile_link),2)
    FFLAGS := -g -fopenmp
else ifeq ($(compile_link),3)
    FFLAGS := -O0 -g -debug -mkl=cluster -recursive
endif

# terminal commands
RM := /bin/rm -f

#############################
##### makefile commands #####
#############################
# define targets
.PHONY:     clean new
all:        main_1 main_2
main:       main_1 main_2
clean:      clean1
new:        clean main

print-%: ;    @echo $* = $($*)

main_1: $(MAIN_OBJ)

main_2:
	@echo Linking to executable "'$(MAIN_EXE)'"
	@$(FL) $(FFLAGS) $(MAIN_OBJ_FINAL) $(LCOMBINE) -o $(MAIN_EXE)

%.o : %.f90
	@echo Compiling $<
	@$(FC) $(FFLAGS) $(ICOMBINE) -c $< -o $(BIN_DIR)/$@

clean1:
	@echo Cleaning binaries
	@$(RM) -r $(BIN_DIR)/*

debug:
	@echo $(MAIN_OBJ_FINAL)
	@echo $(CPPFLAGS)
	@echo $(FFLAGS)
	@echo $(FC)
	@echo $(ICOMBINE)