Gnu make: Generate a list of all subdirectories

Question

I am new to C/C++ and to gnu makefiles especially. Momentarily I have a makefile that automatically generates a list of all sources and headers in one directory in order to make the output binary.

as my project grows I surely do not want to lump all source and header files into one directory. but instead create (nested) subdirectories.......

Is there a way - I guess taking as starting point subdirs := $(wildcard */) - and further involving for... in... ($subdirs) to first only generate a list of the source and header files in the subdirectories and nested subdirectories ? Maybe later with addition of a make call for the sources and headers of every subdirectory ?

Thank you very much.

Yours sincerly von Spotz

Answer 1

You can use $(shell) and script it:

ALL_SOURCES := $(shell find * -name '*.cpp' -print)

(assuming you use .cpp as a C++ source file extension). You should have full and complete documentation of make already installed:

info -f make