cpan Conf::Libconfig failed

[Nitro56]

Hi, I have some problems during cpan Conf::Libconfig

Reading '/root/.cpan/Metadata'
Database was generated on Sat, 22 Apr 2023 11:54:01 GMT
Could not expand [Conf::Libconfigsudo]. Check the module name.
I can suggest names if you install one of Text::Levenshtein::XS, Text::Levenshtein::Damerau::XS, Text::Levenshtein, and Text::Levenshtein::Damerau::PP
and you provide the -x option on invocation.
Skipping Conf::Libconfigsudo because I couldn't find a matching namespace.
Could not expand [cpan]. Check the module name.
Skipping cpan because I couldn't find a matching namespace.
Running install for module 'Conf::Libconfig'
Checksum for /root/.cpan/sources/authors/id/C/CN/CNANGEL/Conf-Libconfig-1.0.0.tar.gz ok
Configuring C/CN/CNANGEL/Conf-Libconfig-1.0.0.tar.gz with Makefile.PL
*** Module::AutoInstall version 1.03
*** Checking for Perl dependencies...
*** Since we're running under CPAN, I'll just let it take care
of the dependency's installation later.
[Core Features]

• Test::Deep ...loaded. (1.204 >= 0.1)
• Test::More ...loaded. (1.302194 >= 0.6)
• Test::Warn ...loaded. (0.37 >= 0.1)
• Test::Exception ...loaded. (0.43 >= 0.25)
• ExtUtils::PkgConfig ...loaded. (1.16)
• XSLoader ...loaded. (0.30 >= 0.05)
  *** Module::AutoInstall configuration finished.
  Checking if your kit is complete...
  Looks good
  Generating a Unix-style Makefile
  Writing Makefile for Conf::Libconfig
  Writing MYMETA.yml and MYMETA.json
  CNANGEL/Conf-Libconfig-1.0.0.tar.gz
  /usr/bin/perl Makefile.PL INSTALLDIRS=site -- OK
  Running make for C/CN/CNANGEL/Conf-Libconfig-1.0.0.tar.gz
  cp lib/Conf/Libconfig.pm blib/lib/Conf/Libconfig.pm
  Running Mkbootstrap for Libconfig ()
  chmod 644 "Libconfig.bs"
  "/usr/bin/perl" "-Iinc" -MExtUtils::Command::MM -e 'cp_nonempty' -- Libconfig.bs blib/arch/auto/Conf/Libconfig/Libconfig.bs 644
  "/usr/bin/perl" "-Iinc" "/usr/share/perl/5.32/ExtUtils/xsubpp" -typemap '/usr/share/perl/5.32/ExtUtils/typemap' -typemap '/root/.cpan/build/Conf-Libconfig-1.0.0-3/typemap' Libconfig.xs > Libconfig.xsc
  Please specify prototyping behavior for Libconfig.xs (see perlxs manual)
  mv Libconfig.xsc Libconfig.c
  x86_64-linux-gnu-gcc -c -D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fwrapv -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -g -DVERSION="1.0.0" -DXS_VERSION="1.0.0" -fPIC "-I/usr/lib/x86_64-linux-gnu/perl/5.32/CORE" Libconfig.c
  Libconfig.xs: In function ‘sv2addarray’:
  Libconfig.xs:365:19: warning: implicit declaration of function ‘av_count’ [-Wimplicit-function-declaration]
  365 | int avlen = (int)av_count(av);
  | ^~~~~~~~
  Libconfig.xs:391:4: error: label at end of compound statement
  391 | default:
  | ^~~~~~~
  Libconfig.xs: In function ‘sv2addobject’:
  Libconfig.xs:430:5: error: label at end of compound statement
  430 | default:
  | ^~~~~~~
  Libconfig.xs:452:5: error: label at end of compound statement
  452 | default:
  | ^~~~~~~
  Libconfig.xs: In function ‘set_general_value’:
  Libconfig.xs:486:5: error: label at end of compound statement
  486 | default:
  | ^~~~~~~
  Libconfig.xs:510:5: error: label at end of compound statement
  510 | default:
  | ^~~~~~~
  Libconfig.xs:532:5: error: label at end of compound statement
  532 | default:
  | ^~~~~~~
  Libconfig.xs:554:5: error: label at end of compound statement
  554 | default:
  | ^~~~~~~
  Libconfig.xs: In function ‘get_general_value’:
  Libconfig.xs:663:4: error: a label can only be part of a statement and a declaration is not a statement
  663 | const char *val = config_setting_get_string(elem);
  | ^~~~~
  make: *** [Makefile:346 : Libconfig.o] Erreur 1
  CNANGEL/Conf-Libconfig-1.0.0.tar.gz
  /usr/bin/make -- NOT OK

[yrutschle]

I ran into this myself last week -- it's not really conf2struct-related, it seems like Debian 11's gcc changed behaviour somehow and Conf::Libconfig no longer compiles on it. I'm unclear on how to fix this nor how to contribute to CPAN, but I'll look into it.

I created an issue on Conf::Libconfig's github cnangel/Conf-Libconfig#4

[yrutschle]

I pushed a fix in my (experimental) fork here: https://github.com/yrutschle/Conf-Libconfig
I haven't tried if it installed, but hopefully following the steps in the README should work, basically:

perl Makefile.PL
make
make test   # they don't all work
make install

I don't have time to try on a clean Debian 11 right now, and won't for a couple of weeks I'm afraid. Let me know if this helps!

[yrutschle]

I just had time to try it, and it in fact crashes Perl. So I guess this does not help.

[yrutschle]

Ok, I was looking in the wrong place: the Perl Module was very recently updated for libconfig-1.7.3, and that's what seems to break the build (on Debian, or on older libconfigs, or... I am not sure yet).
What works for me on a recent Debian:

git clone https://github.com/cnangel/Conf-Libconfig.git
cd Conf-Libconfig
git checkout 3049596d86ba0b9f40cd1c139edf73c92867a8ad
perl Makefile.PL
make
make test
sudo make install

This will install an older version. Let me know if this helps! (I'll try to find what the later changes break)