URL:
<https://savannah.gnu.org/bugs/?54675>
Summary: avoid redundant recipe warning for identical recipes
Project: make
Submitted by: boyski
Submitted on: Tue 18 Sep 2018 01:23:09 AM UTC
Severity: 3 - Normal
Item Group: Enhancement
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Component Version: SCM
Operating System: None
Fixed Release: None
Triage Status: None
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Details:
I'm wondering whether it might be reasonable to skip the redundant-recipe
warnings if the recipes are identical anyway. Test case:
% cat makefile
.PHONY: all
all:
foo:; touch $@
foo:; touch $@
% make
makefile:5: warning: overriding recipe for target 'foo'
makefile:4: warning: ignoring old recipe for target 'foo'
make: Nothing to be done for 'all'.
It looks like this might be avoidable with a strcmp in read.c around line 2113
(in current SCM) though I'm not in a position to try it now.
This comes up because I have various macros and helper makefiles which
generate rules to create directory paths. The recipe to create a directory
will in all cases be "mkdir $@" in my use case but when multiple macros end up
generating identical rules these spurious warnings are still printed. Of
course it can be programmed around but I wonder whether it's worth giving the
warning at all here.
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