URL:
<http://savannah.gnu.org/bugs/?47624>
Summary: Suppress unnecessary warning for "include XXX" when
we know how to build XXX
Project: make
Submitted by: stefanb
Submitted on: Tue 05 Apr 2016 08:18:01 AM GMT
Severity: 3 - Normal
Item Group: Enhancement
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Component Version: 4.1
Operating System: None
Fixed Release: None
Triage Status: None
_______________________________________________________
Details:
Over the years I have seen the same useless discussion popping up again and
again, caused by an unnecessary warning generated by GNU make.
SW build user: build log shows "Makefile:NN: xyz: No such file or directory".
Please replace "include" with "-include" in the build templates to remove this
error message from the log.
SW build owner: This is a GNU make warning, not an error. "-include" cannot be
used, because it causes GNU make to ignore _real_ build errors.
Example test makefile:
.PHONY: default
default:
@echo DONE
generated_include1:
touch $@
include generated_include1
include generated_include2
generated_include2:
touch $@
Test run:
$ rm -f generated_include*; /usr/bin/make -f Makefile.test
Makefile.test:11: generated_include1: No such file or directory
Makefile.test:13: generated_include2: No such file or directory
touch generated_include2
touch generated_include1
DONE
The first warning message is unnecessary, because GNU make already knows that
it will be able to generate the file "generated_include1".
With the attached simple patch we suppress the warning for non-existing files
for which GNU make already has parsed a recipe:
$ rm -f generated_include*; ./make -f Makefile.test
Makefile.test:13: generated_include2: No such file or directory
touch generated_include2
touch generated_include1
DONE
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Tue 05 Apr 2016 08:18:01 AM GMT Name: dummy.patch Size: 906B By:
stefanb
Patch to suppress "include X" warning message for X when recipe for
X is already known
<http://savannah.gnu.org/bugs/download.php?file_id=36837>
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