On 1/22/20 11:04 AM, david wrote: > At 08:05 PM 1/21/2020, you wrote: >> > On 1/21/20 10:10 AM, david wrote: >> >> At 08:52 AM 1/21/2020, David G. Miller wrote: >> >> >> >> >> >>> On 1/21/20 9:35 AM, david wrote: >> >>>> Folks >> >>>> >> >>>> In a test Centos 8 installation as a guest of VirtualBox on Windows >> >>>> 10, I want to install ffmpeg, and support for exfat. They're not in >> >>>> the standard distribution (as far as I know), so I issue as root: >> >>>> >> >>>>  yum -y --enablerepo rpmfusion-free-updates install ffmpeg >> >>>> fuse-exfat exfat-utils >> >>>> >> >>>> and that works just fine. The ffmpeg functionality works; I >> >>>> haven't tested exfat yet. However, later, as part of >> maintenance, >> >>>> I want to get a list of everything that's installed, so I issue >> >>>> >> >>>>  yum list installed >> >>>> >> >>>> and the following diagnostics occur: >> >>>> ------------------------------- >> >>>> Modular dependency problems: >> >>>> >> >>>>  Problem 1: conflicting requests >> >>>>  - nothing provides module(perl:5.26) needed by module >> >>>> perl-App-cpanminus:1.7044:8010020191120175858:a9207fc6-0.x86_64 >> >>>>  Problem 2: conflicting requests >> >>>>  - nothing provides module(perl:5.26) needed by module >> >>>> perl-DBD-MySQL:4.046:8010020191114030811:073fa5fe-0.x86_64 >> >>>>  Problem 3: conflicting requests >> >>>>  - nothing provides module(perl:5.26) needed by module >> >>>> perl-DBD-SQLite:1.58:8010020191114033549:073fa5fe-0.x86_64 >> >>>>  Problem 4: conflicting requests >> >>>>  - nothing provides module(perl:5.26) needed by module >> >>>> perl-DBI:1.641:8010020191113222731:16b3ab4d-0.x86_64 >> >>>>  Problem 5: conflicting requests >> >>>>  - nothing provides module(perl:5.26) needed by module >> >>>> perl-YAML:1.24:8010020191114031501:a5949e2e-0.x86_64 >> >>>> Installed Packages >> >>>> <long list follows> >> >>>> ------------------------------ >> >>>> >> >>>> By the way, cpanm works ok too. >> >>>> >> >>>> >> >>>> My questions are: >> >>>> What do these diagnostics tell me? What am I supposed to do >> about >> >>>> it? >> >>>> >> >>>> Thanks for your help >> >>>> >> >>>> David >> >>>> >> >>>> >> >>> I think its telling you that perl is NOT installed but the listed >> >>> perl modules are installed although it could be looking for >> >>> specifically the 5.26 version of perl (since you mentioned the CPAN >> >>> works). What happens if you issue perl -v? perl gets >> installed as >> >>> a dependency of logwatch as an example so a lot of people don't >> >>> realize that they have perl installed whether they want it or not. >> >>> >> >>> Cheers, >> >>> Dave >> >>> >> >>> -- >> >>> "They that can give up essential liberty to obtain a little >> temporary >> >>> safety deserve neither safety nor liberty." >> >>> >> >>> -- Benjamin Franklin >> >> >> >> >> >> Perl is explicitly installed, "perl -v" identifies v5.26.3, and >> comes >> >> from the standard Centos 8 repositories. So, I suspect your >> >> interpretation doesn't fit the facts. >> >> David K >> >> _______________________________________________ >> >> CentOS mailing list >> >> CentOS at centos.org >> >> https://lists.centos.org/mailman/listinfo/centos >> > Not seeing that here but it appears you are running newer versions >> of at >> > least perl-DBD-MySQL, perl-DBD-SQLite and perl-DBI (snipped from "yum >> > list installed" on my CentOS 8 VM after running "yum update"): >> > >> > perl-DBD-MySQL.x86_64                    >> 4.023-6.el7 @anaconda >> > perl-DBD-SQLite.x86_64                   >> 1.39-3.el7 @anaconda >> > perl-DBI.x86_64                          >> 1.627-4.el7 @anaconda >> > >> > What repo are you pulling the listed packages from? Is it the >> same repo >> > as for perl? I'm getting: >> >> Maybe it's worth to have a look a yum.log to see what happened to >> perl in >> the history of the installation? >> >> Simon > > > Simon and others > Here's a very simple and hopefully reproducible test-case > > Select as your boot ISO: > CentOS-8.1.1911-x86_64-dvd1.iso > Choose to reclaim all space on the disk > Choose 'Minimal Install' as the software selection > Connect yourself to the network (I use a wired connection) > perl-App-cpanminus > Don't bother creating a user, just provide your root password. > complete the install. > > After the reboot, issue as root: > yum -y install perl chrony perl-libwww-perl perl-App-cpanminus gcc > > When that is complete, issue: > yum list installed >nul > and you get conflicting requests as follows: > > ---------------------------- > Modular dependency problems: > > Problem 1: conflicting requests > - nothing provides module(perl:5.26) needed by module > perl-App-cpanminus:1.7044:8010020191120175858:a9207fc6-0.x86_64 > Problem 2: conflicting requests > - nothing provides module(perl:5.26) needed by module > perl-YAML:1.24:8010020191114031501:a5949e2e-0.x86_64 > ---------------------------- > > This doesn't seem like the expected results from a clean install. > No changes were made in the repo files as supplied on the boot disc. > > David > > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos OK. Recreated the issue here. Interestingly, perl-DBI and perl-DBD-SQLite did not have an issue with "nothing provides module(perl:5.26)" until I installed perl-App-cpanimus and perl-YAML which pulled in perl 5.26 (and ~90 other dependencies). They now show up as not being able to find module(perl:5.26) when I do a yum list installed. Also, perl-App-cpanimus and perl-YAML report perl 5.26 as not provided and these are the modules that pulled in perl 5.26. I looked at the appropriate provides and requires for each package with rpm and don't see anything that jumps out at me. Have you tried using these modules in a perl program? Wondering if it's a dnf or rpm dependency coding problem but everything works when you try to use it. A missing dependency should cause the install to fail. Cheers, Dave -- "They that can give up essential liberty to obtain a little temporary safety deserve neither safety nor liberty." -- Benjamin Franklin