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[bug #61042] Enhance implicit rule search logging
From: |
Dmitry Goncharov |
Subject: |
[bug #61042] Enhance implicit rule search logging |
Date: |
Sun, 15 Aug 2021 00:11:27 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0 |
URL:
<https://savannah.gnu.org/bugs/?61042>
Summary: Enhance implicit rule search logging
Project: make
Submitted by: dgoncharov
Submitted on: Sun 15 Aug 2021 04:11:25 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: Any
Fixed Release: None
Triage Status: None
_______________________________________________________
Details:
Enhance implicit search logging.
Consider this rule
%.o: %.c; $(CC) -o $@ -c $<
When the user wants to make hello.o and hello.c is missing, make gives the
following diagnostics.
$ ls
makefile
$ cat makefile
%.o: %.c; $(CC) -o $@ -c $<
$ ~/src/gmake/make/m64/make -R --debug=implicit hello.o |tail +9
Updating goal targets....
File 'hello.o' does not exist.
Looking for an implicit rule for 'hello.o'.
Trying pattern rule with stem 'hello'.
Trying implicit prerequisite 'hello.c'.
Trying pattern rule with stem 'hello'.
Trying implicit prerequisite 'hello.c'.
Looking for a rule with intermediate file 'hello.c'.
Avoiding implicit rule recursion.
No implicit rule found for 'hello.o'.
Must remake target 'hello.o'.
make: *** No rule to make target 'hello.o'. Stop.
$
The bottom line in this diagnostics is the "No rule found" message.
While the issue is that hello.c is missing.
And the user stares at the makefile and says
"How cannot make find the rule? Here it is."
Preferably make should tell which rule it is trying and why it is rejecting
it
and which prerequisite make is trying and what the outcome is.
_______________________________________________________
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- [bug #61042] Enhance implicit rule search logging,
Dmitry Goncharov <=