Sources from subdirectories in Makefile

Question

I have a C++ library built using a Makefile. Until recently, all the sources were in a single directory, and the Makefile did something like this

SOURCES = $(w

Answer 1

You can use several rules in wildcard:

SOURCES := $(wildcard *.cpp */*.cpp)

if you need more depth:

SOURCES := $(wildcard *.cpp */*.cpp */*/*.cpp */*/*/*.cpp)

Unfortunately, and unlike what we sometimes read, glob (**) is not supported by makefile and will be interpreted as normal wildcard (*).

For example **/*.cpp match dir/file.cpp but neither file.cpp nor dir/sub/file.cpp.

If you need infinite depth use shell:

SOURCES := $(shell find . -name "*.cpp")