[bug #64002] Improve MAKEFILE_LIST with include

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?64002>

                 Summary: Improve MAKEFILE_LIST with include
                   Group: make
               Submitter: None
               Submitted: Wed 05 Apr 2023 05:00:15 PM UTC
                Severity: 3 - Normal
              Item Group: Enhancement
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: None
        Operating System: Any
           Fixed Release: None
           Triage Status: None


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Follow-up Comments:


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Date: Wed 05 Apr 2023 05:00:15 PM UTC By: Anonymous
The "include <filepathname>" statement is a way to extend make and re-use
existing code and make less copy paste errors.

Current state:
The MAKEFILE_LIST can be used to detect the name of the current Makefile, e.g.
to allow creation of iterative tests for the Makefiles themselves.
e.g. sh invocation:
for file in (makefiles/*); do make -f $file test; done

Issue:
However as suggested here
https://stackoverflow.com/questions/1400057/getting-the-name-of-the-makefile-from-the-makefile
there is not consise and reliable way to get the name of the current Makefile

Suggestion:
Add one or two automatic variables that allow the running make to determine
which file is being processed.

e.g.
MAKEFILE_LIST would behave unchanged

CURRENT_MAKEFILE Would be the filename filename of the relative to CURDIR e.g.
work/build/Makefile  It would bethe same or similar to:
MAKEFILE_JUSTNAME := $(firstword $(MAKEFILE_LIST))
MAKEFILE_COMPLETE := $(CURDIR)/$(MAKEFILE_JUSTNAME)

CURRENT_SUBMAKE Would be what file(s) the current *line* came from Makefile
Makefile.inc.1 Makefile.inc.1

$(line_num N)
Perhaps a new function, something like $(line_num N) which would expand to the
line where that first expansion occured less N

e.g. (excuse if syntax is not 100%)
warn = $(info Value of $1 at $(line_num $2) is not valid)

DEBUG = $(intcmp $1,$(MAX_DBG),,$(call warn,DBG_LEL,2))$(intcmp
$1,$(CURRENT_DEBUG_LEVEL),$(info $2))
ifneq ($(filter $(DBG_LVL), 0 1 2),)









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