PPPort breaks the build from sources of 5.32 on Ubuntu18.04 (WSLv1)

[vadimkantorov]

I'm running the following script on Ubuntu 18.04 / WSLv1 / case-sensitive mount point. It produces the following error:

chmod 755 ../../lib/auto/Devel/PPPort/PPPort.so
"../../miniperl" "-I../../lib" "-I../../lib" mktests.PL t/01_test.t
t/01_test.t: Permission denied
generating t/01_test.t
Makefile:550: recipe for target 't/01_test.t' failed
make[1]: *** [t/01_test.t] Error 13
make[1]: Leaving directory '/home/vadimkantorov/wipbiber/perl/dist/Devel-PPPort'
make[1]: Entering directory '/home/vadimkantorov/wipbiber/perl/dist/Devel-PPPort'
/home/vadimkantorov/wipbiber/perl/dist/Devel-PPPort/../../miniperl "-I../../lib" -MExtUtils::Command::MM -e 'cp_nonempty' -- PPPort.bs ../../lib/auto/Devel/PPPort/PPPort.bs 644
"../../miniperl" "-I../../lib" "-I../../lib" mktests.PL t/01_test.t
t/01_test.t: Permission denied
generating t/01_test.t
Makefile:550: recipe for target 't/01_test.t' failed
make[1]: *** [t/01_test.t] Error 13
make[1]: Leaving directory '/home/vadimkantorov/wipbiber/perl/dist/Devel-PPPort'
Unsuccessful make(dist/Devel-PPPort): code=512 at make_ext.pl line 588.
makefile:576: recipe for target 'lib/auto/Devel/PPPort/PPPort.so' failed
make: *** [lib/auto/Devel/PPPort/PPPort.so] Error 25

PERL=https://www.cpan.org/src/5.0/perl-5.32.0.tar.gz
EXTR=perl
PREFIX=$PWD/perlprefix

mkdir -p $PREFIX
wget -nc $PERL

mkdir -p perl_
tar -xf $(basename $PERL) --strip-components=1 --directory=perl_
rm -rf $EXTR
cp -r perl_ $EXTR

pushd $EXTR
bash +x ./Configure -sde -Dprefix=$PREFIX
make
#make install
popd

Full log: log.zip

P.S. Can one also configure perl / modules build to skip tests?

Thank you!

[atoomic]

This is strange, I'm not sure why the test need to be executable. @khwilliamson any ideas what went wrong there?

Note that since v5.33.1 dynamic tests from PPPort are not shipped anymore and this file t/01_test.t is not part of the tarball anymore.

[khwilliamson]

No clue. @pali any ideas?

[pali]

I guess that problem is with write permissions. mktests.PL cannot create file t/01_test.t. I have already seen similar issues not related to Perl and it looks like a bug in WSL.

You could try to add permissions: chmod -R a+rw perl

[vadimkantorov]

It generates the object files in-tree without a problem, so it should have write permissions in perl sources directory. But I'll try this out.

[vadimkantorov]

Note that since v5.33.1 dynamic tests from PPPort are not shipped anymore and this file t/01_test.t is not part of the tarball anymore.

The same error is produced on v5.33.1.

after chown and re-launching make, everything works. but this is quite a strange bug.

[pali]

As I said, I have already seen this problem in WSL and I suspect that there is a bug in WSL permission layer.

[vadimkantorov]

Maybe. Just for information, before the build the permissions seem identical:

vadimkantorov@DESKTOP-4UF8FID:~/wipbiber$ ls -lah perl
total 21M
drwxr-xr-x 1 vadimkantorov vadimkantorov 4.0K Oct 19 19:45 .

...

drwxr-xr-x 1 vadimkantorov vadimkantorov 4.0K Oct 19 19:45 t

I wonder if permissions get changed somehow. I'll see if they change after the build

[vadimkantorov]

What happens is:

cd perl/dist/Devel-PPPort # working directory of failing line
"../../miniperl" "-I../../lib" "-I../../lib" mktests.PL t/01_test.t # the failing line
# generating t/01_test.t
# t/01_test.t: Permission denied

From strace:

openat(AT_FDCWD, "t/01_test.t", O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666) = -1 EACCES (Permission denied)
write(2, "t/01_test.t: Permission denied\n", 31t/01_test.t: Permission denied

Indeed, this fails as well: python3 -c 'import os; os.open("t/01_test.t", os.O_WRONLY | os.O_CREAT | os.O_TRUNC | os.O_CLOEXEC, 0o666)'

[vadimkantorov]

This fails as well: python3 -c 'import os; os.open("t/01_test.t", os.O_TRUNC , 0o666)'

[vadimkantorov]

This looks strange enough, reporting to WSL, let's see

[pali]

From strace:

openat(AT_FDCWD, "t/01_test.t", O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666) = -1 EACCES (Permission denied)
write(2, "t/01_test.t: Permission denied\n", 31t/01_test.t: Permission denied

Exactly same issue which I have already seen in other projects.

This looks strange enough, reporting to WSL, let's see

Let us know if you get some information. Thanks!

[vadimkantorov]

A-ha! I found that this file is somehow write-protected:

By that point where it is generated:

vadimkantorov@DESKTOP-4UF8FID:~/wipbiber/perl/dist/Devel-PPPort$ rm t/01_test.t
rm: remove write-protected regular file 't/01_test.t'

[vadimkantorov]

That's why WSL doesn't want to truncate or open it for writing

[vadimkantorov]

Why would it be write-protected?