[bug #61955] Remade Makefiles & Phony Targets

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?61955>

                 Summary: Remade Makefiles & Phony Targets
                 Project: make
            Submitted by: None
            Submitted on: Fri 28 Jan 2022 08:56:59 PM UTC
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 4.3
        Operating System: POSIX-Based
           Fixed Release: None
           Triage Status: None

    _______________________________________________________

Details:

Hi!

I am using make v4.3.

I have a Makefile I always want rebuilt, and included.

include test.mk

.PHONY: all
all:
        @echo MAKE_RESTARTS: $(MAKE_RESTARTS)

.PHONY: test.mk
test.mk:
        touch $@


this results in:

make --debug
GNU Make 4.3
Built for x86_64-pc-linux-gnu
Copyright (C) 1988-2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Reading makefiles...
Updating makefiles....
touch test.mk
Updating goal targets....
 File 'all' does not exist.
Must remake target 'all'.
MAKE_RESTARTS:
Successfully remade target file 'all'.


note how test.mk is generated but MAKE_RESTARTS is not set.

Using the FORCE approach documented here:
https://www.gnu.org/software/make/manual/html_node/Force-Targets.html

include test.mk

.PHONY: all
all:
        @echo MAKE_RESTARTS: $(MAKE_RESTARTS)

FORCE:
test.mk: FORCE
        touch $@


results in somewhat expected behavior. test.mk is generated and MAKE_RESTARTS
is set. sometimes Make restarts more than one time, which is unexpected.


➜  test make --debug
GNU Make 4.3
Built for x86_64-pc-linux-gnu
Copyright (C) 1988-2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Reading makefiles...
Updating makefiles....
touch test.mk
Re-executing[1]: make --debug
GNU Make 4.3
Built for x86_64-pc-linux-gnu
Copyright (C) 1988-2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Reading makefiles...
Updating makefiles....
touch test.mk
Updating goal targets....
 File 'all' does not exist.
Must remake target 'all'.
MAKE_RESTARTS: 1
Successfully remade target file 'all'.
➜  test make --debug
GNU Make 4.3
Built for x86_64-pc-linux-gnu
Copyright (C) 1988-2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Reading makefiles...
Updating makefiles....
touch test.mk
Re-executing[1]: make --debug
GNU Make 4.3
Built for x86_64-pc-linux-gnu
Copyright (C) 1988-2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Reading makefiles...
Updating makefiles....
touch test.mk
Re-executing[2]: make --debug
GNU Make 4.3
Built for x86_64-pc-linux-gnu
Copyright (C) 1988-2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Reading makefiles...
Updating makefiles....
touch test.mk
Updating goal targets....
 File 'all' does not exist.
Must remake target 'all'.
MAKE_RESTARTS: 2






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