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Re: [perl #133787] perl-5.29.6 fails to build on Android 8.1 (Oreo)under Termux app environment

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From:
Richard Leach
Date:
February 5, 2019 02:09
Subject:
Re: [perl #133787] perl-5.29.6 fails to build on Android 8.1 (Oreo)under Termux app environment
Message ID:
CADWSe2ew4ssRVHfMbyJO+E=wMBneEvQc4pS5LPv5dVY7rwsaSQ@mail.gmail.com
On Tue, Feb 5, 2019 at 2:01 AM Richard Leach
<rich@hyphen-dash-hyphen.info> wrote:
>
> On Thu, Jan 24, 2019 at 2:33 AM Richard Leach via RT
> <perlbug-followup@perl.org> wrote:
> > Next problem is that although the miniperl executable does get built,
> > @INC contents are duff, preventing the build from getting much
> > further:
> >
> >     ./miniperl -Ilib -f write_buildcustomize.pl
> >     Use of uninitialized value in -x at dist/PathTools/Cwd.pm line 174.
> >     Use of uninitialized value $_[0] in join or string at
> > dist/PathTools/lib/File/Spec/Unix.pm line 87.
> > ...
> >     rm -f pod/perl5296delta.pod
> >     /data/data/com.termux/files/usr/bin/ln -s perldelta.pod
> > pod/perl5296delta.pod
> >     ./miniperl -Ilib autodoc.pl
> >     Can't locate Exporter.pm in @INC (you may need to install the
> > Exporter module) (@INC contains: /cpan/AutoLoader/lib /dist/Carp/lib
> > /dist/PathTools /dist/PathTools/lib /cpan/ExtUtils-Install/lib
> > /cpan/ExtUtils-MakeMaker/lib /cpan/ExtUtils-Manifest/lib
> > /cpan/File-Path/lib /ext/re /dist/Term-ReadLine/lib /dist/Exporter/lib
> > /ext/File-Find/lib /cpan/Text-Tabs/lib /dist/constant/lib
> > /cpan/version/lib /cpan/Getopt-Long/lib /lib
> > /data/data/com.termux/files/home/PerlSource/perl/lib .) at
> > /data/data/com.termux/files/home/PerlSource/perl/lib/File/Compare.pm
> > line 8.
> >     Compilation failed in require at ./regen/regen_lib.pl line 4.
> >     BEGIN failed--compilation aborted at ./regen/regen_lib.pl line 4.
> >     Compilation failed in require at autodoc.pl line 32.
> >     make: *** [makefile:405: pod/perlintern.pod] Error 2
> >
> >
> > The @INC paths are missing the pwd
> > ("/data/data/com.termux/files/home/PerlSource/perl") prefix, but I
> > can't figure out from INSTALL how to fix that at this point of the
> > build process (i.e. prior to install).
>
> This problem arises in write_buildcustomize.pl, where an empty string
> is assigned to $cwd:
>   my $cwd = Cwd::getcwd();
>
> Discussion in https://rt.cpan.org/Ticket/Display.html?id=13851
> suggests that's to be expected when building as a non-root user
> lacking some access to (grand)parent directories. That is in fact what
> the Termux environment seems to give you.

"Modifying the above line to fallback to Cwd::cwd(), as per the
attached patch, works in this instance."

That is to say, it addresses the bulk of errors seen at this stage.
More to do to get the build to run to completion.

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