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[bug #60960] Fix/report race problem if having multiple "alias" for the
From: |
anonymous |
Subject: |
[bug #60960] Fix/report race problem if having multiple "alias" for the same target |
Date: |
Thu, 22 Jul 2021 09:49:16 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0 |
URL:
<https://savannah.gnu.org/bugs/?60960>
Summary: Fix/report race problem if having multiple "alias"
for the same target
Project: make
Submitted by: None
Submitted on: Thu 22 Jul 2021 01:49:14 PM UTC
Severity: 3 - Normal
Item Group: Enhancement
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Component Version: 4.2.1
Operating System: None
Fixed Release: None
Triage Status: None
_______________________________________________________
Details:
Our team faced some race problems while building a project with Make.
Precise analysis shows that the problem was in fact, that Make doesn't care if
we have different aliases for the same target.
For example:
```
.PHONY: all ../1/../main.o ../2/../main.o
all: ../1/../main.o ../2/../main.o
../1/../main.o:
ccache gcc -o $@ -c ../main.c
../2/../main.o:
ccache gcc -o $@ -c ../main.c
```
Here, we have 2 targets:
../1/../main.o
../2/../main.o
In fact, this is the same target/file (taking into account relative
directories).
As a result if Make will create several threads (for each target) main.o file
will be written concurrently (race condition).
Make doesn't operate in a wrong way.
Anyway, I think it would be great to have an additional checker in a Makefile
which (at least) will notify the operator about the problem in a Makefile.
P.S. Makefile project, using which it is possible to reproduce the problem is
attached to this ticket.
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Thu 22 Jul 2021 01:49:14 PM UTC Name: build_race.tar Size: 20KiB By:
None
<http://savannah.gnu.org/bugs/download.php?file_id=51680>
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/bugs/?60960>
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- [bug #60960] Fix/report race problem if having multiple "alias" for the same target,
anonymous <=