Recursive make in subdirectories

Question

How can I order make command in the Makefile to execute recursively in all subdirectories make commands (defined in the Makefile in the subdirectories)

Answer 1

@eldar-abusalimov, the first link you posted assumes the makefile knows what are the subfolders. This is not always true, and I guess thats what @tyranitar would like to know. In that case, such a solution can do the job: (took me some time, but I needed it too)

SHELL=/bin/bash

all:
    @for a in $$(ls); do \
        if [ -d $$a ]; then \
            echo "processing folder $$a"; \
            $(MAKE) -C $$a; \
        fi; \
    done;
    @echo "Done!"