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I would like to tell (g)make to include some common initializations from a separate file knowing the relative location of the included file with respect to the main Makefile.
However in the manuals I cannot find any built-in variable that would, for example, give you the name of the current Makefile.
For example if I want to include the content of a file in the same directory as the current make file, instead of hard-wiring the location of the include:
# MAIN Makefile : ./scripts/make/TaskA.mk
include ./scripts/make/Common.inc
...
I would like to write something like the following assuming that _MAKEFILE_ contains the TaskA.mk location:
# MAIN Makefile : ./scripts/make/TaskA.mk
MAKEFILE_DIR=$(dirname $(_MAKE_FILE_))
include $(MAKEFILE_DIR)/Common.inc
881
You can use shell function: current_dir = $(shell pwd) . Or shell in combination with notdir , if you need not absolute path: current_dir = $(notdir $(shell pwd)) .
The makefile is a text file that contains the recipe for building your program. It usually resides in the same directory as the sources, and it is usually called Makefile .
That's what abspath does. It creates an absolute path. That means it must be anchored at the root.
Expanded assignment = defines a recursively-expanded variable. := defines a simply-expanded variable.
Doesn't the manual give a recipe based on MAKEFILE_LIST?
Basically
this_makefile := $(lastword $(MAKEFILE_LIST))
before any include directives should do the trick.
75
Look at GNU make - Other Special Variables. MAKEFILE_LIST includes all Makefiles read. So, if you take the first one and extract the directory, you're done.
MAKEFILE_DIR=$(dir $(firstword $(MAKEFILE_LIST)))
include $(MAKEFILE_DIR)Common.inc
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