URL:
<http://savannah.gnu.org/bugs/?54233>
Summary: Infinite loop w/ -j2 & multiple pattern rules
Project: make
Submitted by: alecov
Submitted on: Mon 02 Jul 2018 06:10:19 PM UTC
Severity: 3 - Normal
Item Group: Bug
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Component Version: 4.2.1
Operating System: Any
Fixed Release: None
Triage Status: None
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Details:
Make enters an infinite loop when `-j2` is used in the following situation:
# make -j2
# Try with a single-line recipe for %.elf/%.lnk or .ONESHELL.
#.ONESHELL:
all: a.elf a.dbg
%.elf \
%.lnk: %.c
#$*.elf
#$*.lnk
%.elf \
%.dbg: %.lnk
#$*.elf
#$*.dbg
If either `.ONESHELL:` is omitted or a single-line recipe is used for the
`%.elf/%.lnk` target, make runs fine.
A quick inspection with `make -d` yields:
Considering target file 'all'.
File 'all' does not exist.
Considering target file 'a.elf'.
File 'a.elf' was considered already.
Considering target file 'a.dbg'.
File 'a.dbg' does not exist.
Considering target file 'a.lnk'.
Still updating file 'a.lnk'.
Considering target file 'a.c'.
File 'a.c' was considered already.
Finished prerequisites of target file 'a.dbg'.
The prerequisites of 'a.dbg' are being made.
Finished prerequisites of target file 'all'.
The prerequisites of 'all' are being made.
(...repeats indefinitely...)
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Mon 02 Jul 2018 06:10:19 PM UTC Name: Makefile Size: 169B By: alecov
Test case
<http://savannah.gnu.org/bugs/download.php?file_id=44493>
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