Generic C++ Makefile with support for multiple executables

Makefile

APPS       := nmdbg bla

nmdbg_OBJS := blubb.o
nmdbg_LIBS := -lboost_regex

bla_OBJS   := blubb.o

CXX        := g++-6
CXXFLAGS   := -I3rdparty/json/src -Iinclude -Isrc

LD         := g++-6
LDFLAGS    := -Llib

LIBS       := -lboost_filesystem -lboost_system

.PHONY: all clean

all:: bin/ build/ $(addprefix bin/,$(APPS))
		@printf '\033[32mbuilt all\033[0m\n'

clean:
		@printf '\033[31mcleaning\033[0m\n'
		rm -rf bin build

bin/:
		@printf '\033[36mcreating $@\033[0m\n'
		mkdir bin

build/:
		@printf '\033[36mcreating $@\033[0m\n'
		mkdir build

build/%.o: src/%.cpp
		@printf '\033[33mcompiling $@ from $^\033[0m\n'
		$(CXX) -std=c++11 $(CXXFLAGS) -c $< -o $@

.SECONDEXPANSION:

.SECONDARY: build/%.o
.PRECIOUS: build/%.o bin/%

bin/%: build/%.o $$(addprefix build/,$$($$*_OBJS))
		@printf '\033[1;35mlinking $@ from $^\033[0m\n'
		$(LD) -std=c++11 $(LDFLAGS) $^ $($*_LIBS) $(LIBS) -o $@