URL:
<https://savannah.gnu.org/bugs/?59662>
Summary: ifdef tracking is confused by define/endef
Project: make
Submitted by: psmith
Submitted on: Fri 11 Dec 2020 12:52:22 PM EST
Severity: 3 - Normal
Item Group: Bug
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Component Version: 3.81
Operating System: Any
Fixed Release: None
Triage Status: None
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Details:
This was reported 5 years ago on StackOverflow but apparently never published
here (even though I suggested it and gave a link :)). In this makefile, make
gets confused by the ifeq that appears inside the define:
ifdef FALSE # 1
$(info outer)
define macro # 2
$(info define)
ifeq ($(1),1)
$(info inner start)
define inner_macro # 3
$(info inner define)
endef # 4
$(info inner end)
endif
$(info if end)
endef
$(info outer end)
endif
all:;
Basically the entirety of the content should be ignored because "ifdef FALSE"
is false. But that's not what happens:
$ make
if end
Makefile:13: *** missing separator. Stop.
It seems that the parsing here gets confused and when the make parser sees the
endef at #4 it matches it with the define at #2 (remember this entire thing
should be ignored, so we shouldn't be tracking define/endef here at all!!) and
the parsing becomes live again.
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