Re^5: How to add path to @INC

Can't exec "dot": Ficheiro ou directoria inexistente at Build.PL line 14.

On Ubuntu, I also don't have "dot":

$ dot --help
The program 'dot' is currently not installed. You can install it by ty
+ping:
sudo apt-get install graphviz
$
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Not sure what the intent of Build.PL is, but if I wanted to install GraphViz then I would first install "dot".
I think that should enable installation of that module.

version.c:30:16: fatal error: db.h: Ficheiro ou directoria inexistente #include <db.h>

db.h is not being found - you can fix this by adding the location of db.h to the CPATH environment variable:

export CPATH=/wherever/it/is:$CPATH
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I think you'll subsequently find that the DB library is also unlocatable - which will result in unresolved symbols when you try to run the module (eg during 'make test' stage of the build).
That being so, I would try adding the location of the DB library's .so file to the LD_LIBRARY_PATH environment variable:

export LD_LIBRARY_PATH=/wherever/it/is:$LD_LIBRARY_PATH
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Or maybe you need to add the location of the static DB library (.a) to the LIBRARY_PATH environment variable.
I'm a little unsure as I've never managed to properly understand the way linking is effected on Linux - I just usually stuff around with things until I find something that works.
Maybe someone else can chime in here with some more definitive advice.

Cheers,
Rob

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Re^6: How to add path to @INC by TSN (Acolyte) on May 22, 2016 at 03:08 UTC
One more question Rob Now I have this: `cpan[3]> install DB_File Running install for module 'DB_File' PMQS/DB_File-1.838.tar.gz Has already been unwrapped into directory /home/uce/.cpan/build/DB_F +ile-1.838-yBmp3Q PMQS/DB_File-1.838.tar.gz Has already been prepared PMQS/DB_File-1.838.tar.gz Could not make: Unknown error` [download] What can I do to fix it? Best, TSN	[reply] [d/l]
Re^7: How to add path to @INC by syphilis (Archbishop) on May 22, 2016 at 03:47 UTC
Has already been unwrapped into directory /home/uce/.cpan/build/DB_File-1.838-yBmp3Q Not sure ... I'm not at all that familiar with these cpan* shells. However, I think it means that it wouldn't unpack PMQS/DB_File-1.838.tar.gz into /home/uce/.cpan/build/DB_File-1.838-yBmp3Q because that directory already exists. That being so, removing that DB_File-1.838-yBmp3Q directory should work. (Or perhaps opening a new instance of the CPAN shell and re-running the same command will unpack into a different location and therefore succeed.) Cheers, Rob	[reply]