in reply to How to add path to @INC

However TryCatch is installed but in a path that is not in @INC, TryCatch is in ~/.cpan/build/TryCatch-1.003002-0KBiDH/lib!

As others have stated, it is not installed there - that is where it was built.
And, if any of the tests failed, then it won't be installed at all unless you use force: 
cpan -fi TryCatch

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Adding ~/.cpan/build/TryCatch-1.003002-0KBiDH/lib to @INC will probably not work.
It will enable TryCatch.pm to be found, but then the TryCatch loadable object (.so or .dll, depending upon platform) will not be found. For the loadable object to be found you probably need to also add ~/.cpan/build/TryCatch-1.003002-0KBiDH/blib/arch to @INC.
This assumes that ~/.cpan/build/TryCatch-1.003002-0KBiDH/blib/arch/auto/TryCatch/TryCatch.so (or .dll) exists, and this is not necessarily the case.
The existence of ~/.cpan/build/TryCatch-1.003002-0KBiDH/ indicates that an attempt to build and install TryCatch was made, but it doesn't tell us if it succeeded, or at what stage the process failed (if it did not succeed).

Could you please run: 
cpan -i TryCatch

[download]
and post the output.

Cheers,
Rob

Replies are listed 'Best First'.
Re^2: How to add path to @INC
by TSN (Acolyte) on May 21, 2016 at 01:24 UTC
[reply]
[d/l]
      First problem occurs when building Scope::Upper (which is a TryCatch prerequisite): 
      Upper.xs:1331:11: error: ‘CXt_LOOP_FOR’ undeclared (first use in this 
+function)
      case CXt_LOOP_FOR:

      [download]
      Therefore Scope::Upper fails to build and does not get installed.
      Versions of perl prior to 5.24.0 define CXt_LOOP_FOR in cop.h, but not perl-5.24.0.
      But it's worse than that - see the bug report.
      That thread contains a patch which might solve your issue if you wish to apply it.

      TryCatch therefore fails its tests because Scope::Upper cannot be found.
      Therefore, TryCatch fails to install. You could force the installation but that won't help because TryCatch.pm needs to load Scope/Upper.pm and there's no way of installing a loadable Scope::Upper when it fails to build.

      I would take this up with the authors of these 2 modules.
      Does TryCatch *really* need to use Scope::Upper ?
      Maybe the Scope::Upper author would agree to upload a devel version of Scope::Upper that at least builds (despite his reservations about the mileage that would provide). It could be that the broken aspects of Scope::Upper don't impact on TryCatch.pm and it's just a matter of installing the patched version.

      Or you could consider using something else .... or revert to perl-5.22.x or earlier.

      Cheers,
      Rob
[reply]
[d/l]
        That thread contains a patch which might solve your issue if you wish to apply it.
        That patch was just a work-in-progress proof of concept; I wouldn't recommend using it in production. I'm still working writing proper fixes for Scope::Upper.

        Dave.

[reply]
        Thank you Rob

        I had a earlier version of Perl however I needed update it due to a software (CLUMPAK) that asks for modules that only work in Perl 5.24! Really everything worked fine in earlier version but in this one I have problems like that! Even more others modules have problems too: 

        cpan[7]> install GraphViz
Running install for module 'GraphViz'
Checksum for /home/uce/.cpan/sources/authors/id/R/RS/RSAVAGE/GraphViz-
+2.20.tgz ok
Configuring R/RS/RSAVAGE/GraphViz-2.20.tgz with Build.PL
Can't exec "dot": Ficheiro ou directoria inexistente at Build.PL line 
+14.
Please install Graphviz from http://www.graphviz.org/.
No 'Build' created  RSAVAGE/GraphViz-2.20.tgz
  /usr/local/bin/perl Build.PL --installdirs site -- NOT OK
Failed during this command:
 RSAVAGE/GraphViz-2.20.tgz                    : writemakefile NO -- No
+ 'Build' created

        [download]

        or 

        cpan[6]> install DB_File
Running install for module 'DB_File'
Checksum for /home/uce/.cpan/sources/authors/id/P/PM/PMQS/DB_File-1.83
+8.tar.gz ok
Configuring P/PM/PMQS/DB_File-1.838.tar.gz with Makefile.PL
Parsing config.in...
Looks Good.
Checking if your kit is complete...
Looks good
'EXPATINCPATH' is not a known MakeMaker parameter name.
'EXPATLIBPATH' is not a known MakeMaker parameter name.
Warning (mostly harmless): No library found for -ldb
Generating a Unix-style Makefile
Writing Makefile for DB_File
Writing MYMETA.yml and MYMETA.json
  PMQS/DB_File-1.838.tar.gz
  /usr/local/bin/perl Makefile.PL EXPATLIBPATH=/non-standard/lib EXPAT
+INCPATH=/non-standard/include -- OK
Running make for P/PM/PMQS/DB_File-1.838.tar.gz
cp DB_File.pm blib/lib/DB_File.pm
Running Mkbootstrap for DB_File ()
chmod 644 "DB_File.bs"
"/usr/local/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- DB_F
+ile.bs blib/arch/auto/DB_File/DB_File.bs 644
cc -c  -I/usr/local/BerkeleyDB/include -fwrapv -fno-strict-aliasing -p
+ipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE -D_FIL
+E_OFFSET_BITS=64 -O2   -DVERSION=\"1.838\" -DXS_VERSION=\"1.838\" -fP
+IC "-I/usr/local/lib/perl5/5.24.0/x86_64-linux/CORE"  -D_NOT_CORE  -D
+mDB_Prefix_t=size_t -DmDB_Hash_t=u_int32_t   version.c 
version.c:30:16: fatal error: db.h: Ficheiro ou directoria inexistente
 #include <db.h>
                ^
compilation terminated.
make: ** [version.o] Erro 1
  PMQS/DB_File-1.838.tar.gz
  /usr/bin/make -- NOT OK
Failed during this command:
 PMQS/DB_File-1.838.tar.gz                    : make NO

        [download]

        summing up, all these modules required for Bio:SeIO fail 

        cpan[5]> install Bio::SeqIO
Running install for module 'Bio::SeqIO'
Checksum for /home/uce/.cpan/sources/authors/id/C/CJ/CJFIELDS/BioPerl-
+1.6.924.tar.gz ok
Scanning cache /home/uce/.cpan/build for sizes
......................................................................
+......DONE
Configuring C/CJ/CJFIELDS/BioPerl-1.6.924.tar.gz with Build.PL
Checking prerequisites...
  recommends:
    *  DB_File is not installed
    *  GraphViz is not installed
    *  SOAP::Lite is not installed

Checking optional features...
Bio::DB::GFF Tests....disabled
  requires:
    ! DBI is not installed
DB_File Tests.........disabled
  requires:
    ! DB_File is not installed
EntrezGene............disabled
  requires:
    ! Bio::ASN1::EntrezGene is not installed
MySQL Tests...........disabled
  requires:
    ! DBD::mysql is not installed
    ! DBI is not installed
Pg Tests..............disabled
  requires:
    ! DBD::Pg is not installed
    ! DBI is not installed
SQLite Tests..........disabled
  requires:
    ! DBD::SQLite is not installed
    ! DBI is not installed

ERRORS/WARNINGS FOUND IN PREREQUISITES.  You may wish to install the v
+ersions
of the modules indicated above before proceeding with this installatio
+n

Install [a]ll BioPerl scripts, [n]one, or choose groups [i]nteractivel
+y? [a] ^CWarning: No success on command[/usr/local/bin/perl Build.PL 
+--installdirs site]
  CJFIELDS/BioPerl-1.6.924.tar.gz
  /usr/local/bin/perl Build.PL --installdirs site -- NOT OK
Failed during this command:
 CJFIELDS/BioPerl-1.6.924.tar.gz              : writemakefile NO '/usr
+/local/bin/perl Build.PL --installdirs site' returned status 2

        [download]

        However I installed BioPerl-1.6.924 (Bio::SeqIO) from "outside" (without cpan), after to adding the path at PERL5LIB, and it works just fine! When I run all tests everything sounds good! 

        All tests successful.
Files=334, Tests=21522, 120 wallclock secs ( 3.39 usr  0.47 sys + 107.
+39 cusr  4.43 csys = 115.68 CPU)
Result: PASS

        [download]

        What you think about all this?

        Best, TSN

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