Makefile: sources inside path with spaces - makefile

Question

I am writing a Makefile for a project where all the cpp files are in subdirectories and some of them contains spaces:
└──  L0/
│ └────  Commodities API/
│ │ └────  commodities_api.h
│ └────  Communication API/
│ │ └────  communication_api.h
│ └────  L0 Base/
│ │ ├────  L0_base.cpp
│ │ └────  L0_base.h
│ └────  Provision API/
│ │ └────  provision_api.h
│ ├────  L0_commodities.cpp
│ ├────  L0_communication.cpp
│ ├────  L0.cpp
│ ├────  L0_enumerations.h
│ ├────  L0_error_manager.h
│ ├────  L0.h
│ ├────  L0_provision.cpp
This is my Makefile 'til now:
CPP = g++
LFLAGS +=
CFLAGS += -g -MMD
INCLUDES +=
CPP_SRCS := $(shell find sources -name '*.cpp' | sort | uniq | sed 's/ /\\\\ /g')
CPP_DIRS := $(shell find sources -name '*.cpp' -printf '%h\n' | sort | uniq | sed 's/ /\\\\ /g')
OBJS := $(CPP_SRCS:.cpp=.o)
OUT_DIR := out
all:
#echo $(CPP_SRCS)
#echo
#echo $(OBJS)
#echo
#echo $(CPP_DIRS)
lib.so: $(OBJS)
%.o: %.cpp Makefile
#echo "[C] $<"
$(CPP) -c $(CFLAGS) $(INCLUDES) "$<"
This is the output from the "all" target, used to print the three variables:
sources/L0/L0\ Base/L0_base.cpp sources/L0/L0_commodities.cpp sources/L0/L0_communication.cpp sources/L0/L0.cpp sources/L0/L0_provision.cpp sources/L1/Crypto\ Libraries/aes256.cpp sources/L1/L1\ Base/L1_base.cpp sources/L1/L1.cpp sources/L1/L1_login_logout.cpp sources/L1/L1_security.cpp sources/L1/L1_sekey.cpp
sources/L0/L0\ Base/L0_base.o sources/L0/L0_commodities.o sources/L0/L0_communication.o sources/L0/L0.o sources/L0/L0_provision.o sources/L1/Crypto\ Libraries/aes256.o sources/L1/L1\ Base/L1_base.o sources/L1/L1.o sources/L1/L1_login_logout.o sources/L1/L1_security.o sources/L1/L1_sekey.o
sources/L0 sources/L0/L0\ Base sources/L1 sources/L1/Crypto\ Libraries sources/L1/L1\ Base
But when I try to launch make lib.so
make: *** No rule to make target 'sources/L0/L0\', needed by 'lib.so'. Stop.
What can I do to solve this problem? Thanks!

Answer 1

Make use spaces as list delimiter, and there is no good way to escape it (pun intended). Your options include:
Replace the spaces with something else, like dash or underscore
Migrate from Make to e.g. CMake or SCons
For Windows you can reference any file or directory by its short path which is guaranteed not having spaces, see https://superuser.com/questions/348079/how-can-i-find-the-short-path-of-a-windows-directory-file.