OLD_SHELL := $(SHELL)
SHELL = $(warning Building $@$(if $^, (from $^))$(if $?, ($? newer)))$(OLD_SHELL)

PROJ_DIR  = ..
SRC_DIR   = $(PROJ_DIR)/src
BUILD_DIR = $(PROJ_DIR)/build
LIB_SOURCES =   $(wildcard $(SRC_DIR)/*.cpp)

OBJS=$(patsubst $(SRC_DIR)/%.cpp,$(BUILD_DIR)/%.o,$(LIB_SOURCES) )

CXX=mpicxx

DEPFLAGS = -Wp,-MMD,$(@D)/.$(@F).d,-MT,$@

.SUFFIXES:

all: $(OBJS)

clean:
    rm $(BUILD_DIR)/*.o

$(BUILD_DIR)/%.o: $(SRC_DIR)/%.cpp
    $(CXX) $(DEPFLAGS) -c $< -o $@

#define SOURCE_TEMPLATE
#$$(BUILD_DIR)/$$(shell $$(CXX) -MM $(1))
#endef
#$(foreach SRC,$(LIB_SOURCES),$(eval $(call SOURCE_TEMPLATE,$(SRC))))