URL:
<https://savannah.gnu.org/bugs/?65019>
Summary: Let function segfaults when foreach return empty
list
Group: make
Submitter: ermingol
Submitted: Tue 12 Dec 2023 12:47:49 PM UTC
Severity: 3 - Normal
Item Group: Bug
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Component Version: 4.4
Operating System: None
Fixed Release: None
Triage Status: None
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Follow-up Comments:
-------------------------------------------------------
Date: Tue 12 Dec 2023 12:47:49 PM UTC By: John Olsson <ermingol>
The following Makefile segfaults when the return value from the foreach
function is assigned to the two local variables 'result' and 'rest' AND the
forach function return an empty list.
To reproduce the segmentation fault run the Makefile below in a folder which
does not contain the folder 'fum' with file 'foo.txt'. Once 'fum/foo.txt'
exist there is no segfault.
I have only verified this on CentOS 7.9.
define foobar
$(info foobar: $(1))
$(let file folderlist,$(1) $(2),\
$(info file='$(file)' folderlist='$(folderlist)')
$(let result rest,\
$(foreach folder,$(folderlist),\
$(wildcard $(folder)/$(file))),\
$(info result='$(result)' rest='$(rest)')))
endef
$(call foobar,foo.txt,fum)
.PHONY: all
all:
@:
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