URL:
<https://savannah.gnu.org/bugs/?56206>
Summary: ifndef false positive for exported variable
Project: make
Submitted by: valir
Submitted on: Wed 24 Apr 2019 03:47:58 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: POSIX-Based
Fixed Release: None
Triage Status: None
_______________________________________________________
Details:
Platforms: ArchLinux and Fedora 29
We struggled a bit with this one but here is the test case.
Please check the attached makefiles, after placing them together in the same
directory.
Test case 1:
# With the files as given here:
$ make all
make -f child.mk all
make[1]: Entering directory ....
TEST_VAR=test
make[1]: Leaving directory ....
Now go and modify the files as described in the "child.mk" comments, then run
again:
$ make all
make -f child.mk all
make[1]: Entering directory ...
TEST_VAR=
make[1]: ...
As you can see, the TEST_VAR was now empty.
We are not sure here what's the correct behavior. Does the export from the
main Makefile defines the variable? Either ways, one of the test cases shows
that we are having a bug here.
Thanks,
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Wed 24 Apr 2019 03:47:58 PM UTC Name: Makefile Size: 52B By: valir
<http://savannah.gnu.org/bugs/download.php?file_id=46825>
-------------------------------------------------------
Date: Wed 24 Apr 2019 03:47:58 PM UTC Name: child.mk Size: 260B By: valir
<http://savannah.gnu.org/bugs/download.php?file_id=46826>
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<https://savannah.gnu.org/bugs/?56206>
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