Is it possible to use a makefile that directs the make process itself to chdir? I want to write a makefile that expects to be executed from the build directory.
Suppose I have a project directory structure that looks like this
project/
├── Makefile
├── include
│ └── Foo.h
├── src
│ └── Foo.cpp
└── test
└── FooTest.cpp
and the first thing the make directory does is make a build directory.
project/
├── Makefile
├── _build
├── include
│ └── Foo.h
├── src
│ └── Foo.cpp
└── test
└── FooTest.cpp
Is it possible to direct the makefile to chdir into _build to simplify my rules?
I want to be able to write (for example)
foo : Foo.o
$(LD) $^ -o $@ $(LDFLAGS)
rather than
_build/foo : _build/Foo.o
$(LD) $^ -o $@ $(LDFLAGS)
I know I can add the build directory to the VPATH in order to affect path resolution, but it seems cleaner to just chdir Make itself. Is there a way to do this (preferably without using guile)?
You can make a simple Makefile that forwards everything:
.DEFAULT_GOAL := all
.PHONY: ${MAKECMDGOALS}
$(filter-out all,${MAKECMDGOALS}) all: .forward-all ; @:
.forward-all:
${MAKE} -C build ${MAKECMDGOALS}
# Never try to remake this makefile.
${MAKEFILE_LIST}: ;
.SUFFIXES: