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RE: Bug in make-3.81: variable_buffer moves out from under buffer
From: |
Martin Dorey |
Subject: |
RE: Bug in make-3.81: variable_buffer moves out from under buffer |
Date: |
Tue, 20 Jan 2009 19:07:02 -0800 |
Thanks. I was hoping it'd be something like that. Even with that clue,
though, I'm not having any luck making the buffer need reallocating at
the appropriate point. How frustrating.
-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf Of David
Wuertele
Sent: Tuesday, January 20, 2009 15:07
To: address@hidden
Subject: Re: Bug in make-3.81: variable_buffer moves out from under
buffer
Martin Dorey <mdorey <at> bluearc.com> writes:
> In the original makefile, does
> the long rule really not contain any variables or involve any $(eval)
trickery?
Not sure what you mean by trickery, but it definitely involves eval and
variables.
The rule is created with an eval:
$(eval $(call somemacro,many,different,arguments,many,many,many))
somemacro calls other macros:
define somemacro
$(foreach thing,$(filter-out unwanted-stuff,$(wildcard $1/*)),$(call
othermacro,$1,$(thing),$2,$3,and,more,stuff))
endef
othermacro calls yet more functions:
define othermacro
$(patsubst $1/%.x,$3/.y-%,$2): $3/.y-%: $1/%.x; echo blah blah blah
endef
When I unwind these calls and write the expansion out manually, I
invariably
change the order that stuff gets evaluated, which results in
variable_buffer
being large enough to avoid triggering the bug.
Dave
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