URL:
<http://savannah.gnu.org/bugs/?45949>
Summary: MAKEFLAGS += -r has no effect for current Makefile
Project: make
Submitted by: None
Submitted on: Sun 13 Sep 2015 07:45:04 AM UTC
Severity: 3 - Normal
Item Group: Documentation
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Component Version: 4.1
Operating System: POSIX-Based
Fixed Release: None
Triage Status: None
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Details:
The 5.7.3 section of the documentation states that:
_The MAKEFLAGS variable can also be useful if you want to have certain
options, such as â-kâ (see Summary of Options), set each time you run
make. You simply put a value for MAKEFLAGS in your environment. You can also
set MAKEFLAGS in a makefile, to specify additional flags that should also be
in effect for that makefile._
This does not seams to be true, at least for the -r flag. Example makefile:
MAKEFLAGS += -r
foo.c:
touch $@
Apparently, _MAKEFLAGS += -r_ does not force make to ignore all implicit rules
for the current makefile:
$ rm foo.* ; make foo.o
touch foo.c
cc -c -o foo.o foo.c
While:
$ rm foo.* ; make -r foo.o
make: *** No rule to make target `foo.o'. Stop.
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