Jul 10, 2010 · The Makefile builds the hello executable if any one of main.cpp, hello.cpp, factorial.cpp changed. The smallest possible Makefile to achieve that specification could have …

Jan 6, 2019 · Running make with the following Makefile will instantly exit: a = $(shell sleep 3) Running make with the following Makefile will sleep for 3 seconds, and then exit: a := $(shell …

If something like HELLO_WORLD = $(HELLO_WORLD) world! were used, recursion would result, which would most likely end the execution of your Makefile. If A := $(A) $(B) were used, the …

Dec 19, 2023 · How to conditionally set Makefile variable to something if it is empty? Related. 985.

Feb 23, 2014 · From make manpage: $@ is: The file name of the target of the rule. If the target is an archive member, then ‘$@’ is the name of the archive file.

Dec 23, 2016 · A makefile is processed sequentially, line by line. Variable assignments are "internalized", and include statements cause the contents of other files to be inserted literally …

Nov 10, 2017 · Makefile.am is a programmer-defined file and is used by automake to generate the Makefile.in file (the .am stands for automake). The configure script typically seen in source …

May 29, 2013 · It means "don't echo this command on the output." So this rule is saying "execute the shell command : and don't echo the output.

I am playing around with makefiles and I came across %.o or %.c. From what I understood, it specify all c or o files. But why this work: %.o: %.c $(CC) -c $^ -o $@ and this doesn't work

Apr 23, 2014 · The linker searches for dependencies in the order they are on the command line. So when you ask the linker to link with a library (with e.g. -lm) then the linker will see if there is …