Anyone knows the paths of guile module searched by "load-extension"?

[Shujing Ke]

Hi, 

Anyone know is there a file or somewhere that specify the paths that "load-extension" will search? I am adding a new module , it always says "ERROR: In procedure dynamic-link: file: "libguile-patternminer", message: "file not found"". 

libguile-patternminer.so is in build/opencog/learning/PatternMiner/

patternminer.scm is in build/opencog/scm/opencog/learning/

When I load patternminer.scm manually from guile shell, it gives the above error. 

I look at the other existing modules, I cannot find the place to specify the path. In files cogserver.scm and atom_types.scm, they say:

; libguile-cogserver.so is located in /usr/local/lib/opencog

; libnlp-types.so is in /usr/local/lib/opencog/modules

But libguile-cogserver.so and libnlp-types.so are not there.

Anyone can help? 

Thanks,

Shujing

[Linas Vepstas]

they should all be in /usr/local/lib/opencog

Did you run 'make install'?  I'm pretty sure that none of the scheme modules work, until you install them.

--linas

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[Shujing Ke]

Thanks, Linas, it works. I forgot that OpenCog does make install now.

Shujing

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[Shujing Ke]

Actually, it still doesn't work.... 

After I did make install, I found libguile-patternminer.so in /usr/local/lib/opencog/ but  when I load patternminer.scm in guile manually , it still cannot find the so file:

guile> (load "opencog/scm/opencog/learning/patternminer.scm")

....ERROR: In procedure dynamic-link: file: "libguile-patternminer", message: "file not found"

Also I cannot find the place to add pre-load scm modules... When I do (use-modules (opencog patternminer)), it gives error:

....ERROR: no code for module (opencog patternminer)

[AmeBel]

Place  https://github.com/opencog/docker/blob/master/opencog/base/scripts/.guile in your home directory, or or execute the second line in your guile shell.

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[Shujing Ke]

Thanks Amen. 

I found that ADD_GUILE_MODULE (xxxxx.scm) will install xxxxx.scm to 

/usr/local/share/opencog/scm/opencog/xxxxx's dictionary, like patternminer.scm is installed in: /usr/local/share/opencog/scm/opencog/learning/ , but this dictionary will not be searched by guile (use-modules (opencog xxxxx)), even I added this path to config.scm in cogserver folder or I do 

guile> (add-to-load-path "/usr/local/share/opencog/scm/opencog/learning")

It still cannot be found.Only if I copy patternminer.scm to i/usr/local/share/opencog/scm/opencog/ , then it will be found by guile. 

When I do  (use-modules (opencog patternminer)),  it won't say "no code for opencog patternminer" any more; but it still cannot find libguile-patternminer.so, even libguile-patternminer.so is right located in /usr/local/lib/opencog/ . 

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[Shujing Ke]

Let me make the problem more clearly:

I start cogserver, and enter guile by rlwrap telnet localhost 17001

If I do  (load-extension "libguile-cogserver" "opencog_cogserver_init") , it works, but If I do (load-extension "libguile-patternminer.so" "opencog_patternminer_init") , it gives the below error:

In ice-9/boot-9.scm:

 157: 10 [catch #t #<catch-closure 2047b20> ...]

In unknown file:

   ?: 9 [apply-smob/1 #<catch-closure 2047b20>]

In ice-9/boot-9.scm:

 157: 8 [catch #t #<catch-closure 212ce40> ...]

In unknown file:

   ?: 7 [apply-smob/1 #<catch-closure 212ce40>]

   ?: 6 [call-with-input-string "(load-extension \"libguile-patternminer.so\" \"opencog_patternminer_init\")\n" ...]

In ice-9/boot-9.scm:

2320: 5 [save-module-excursion #<procedure 209cf30 at ice-9/eval-string.scm:65:9 ()>]

In ice-9/eval-string.scm:

  44: 4 [read-and-eval #<input: string 205fb60> #:lang ...]

  37: 3 [lp (load-extension "libguile-patternminer.so" "opencog_patternminer_init")]

In unknown file:

   ?: 2 [load-extension "libguile-patternminer.so" "opencog_patternminer_init"]

In ice-9/boot-9.scm:

 102: 1 [#<procedure 209dd40 at ice-9/boot-9.scm:97:6 (thrown-k . args)> misc-error ...]

In unknown file:

   ?: 0 [apply-smob/1 #<catch-closure 212ce00> misc-error ...]

ERROR: In procedure apply-smob/1:

ERROR: In procedure dynamic-link: file: "libguile-patternminer.so", message: "file not found"

ABORT: misc-error

libguile-patternminer.so is right in /usr/local/lib/opencog , the same as libguile-cogserver.so and other modules. Why guile cannot find it?

Thanks,

Shujing

[AmeBel]

On Wednesday, March 29, 2017 at 6:02:24 PM UTC+8, shujingke wrote:

Thanks Amen. 

I found that ADD_GUILE_MODULE (xxxxx.scm) will install xxxxx.scm to 

/usr/local/share/opencog/scm/opencog/xxxxx's dictionary, like patternminer.scm is installed in: /usr/local/share/opencog/scm/opencog/learning/ , but this dictionary will not be searched by guile (use-modules (opencog xxxxx)), even I added this path to config.scm in cogserver folder or I do 

guile> (add-to-load-path "/usr/local/share/opencog/scm/opencog/learning")

It still cannot be found.Only if I copy patternminer.scm to i/usr/local/share/opencog/scm/opencog/ , then it will be found by guile. 

When I do  (use-modules (opencog patternminer)),  it won't say "no code for opencog patternminer" any more; but it still cannot find libguile-patternminer.so, even libguile-patternminer.so is right located in /usr/local/lib/opencog/ . 

yes that is a correct behavior, A brief intro on how guile module's file-system structure work, https://www.gnu.org/software/guile/manual/guile.html#Modules-and-the-File-System 

See https://github.com/opencog/opencog/blob/master/opencog/openpsi/CMakeLists.txt for an example.

The openpsi.scm file has the same name as the directory and has the define-module content. So when it is installed it is copied to /usr/local/share/opencog/scm/opencog/openpsi.scm while the rest of the files are copied to  /usr/local/share/opencog/scm/opencog/openpsi/other-files.scm

[Shujing Ke]

Thanks Amen. It turned out to be a dependency problem, not really cannot find the lib file, but cannot find another lib that this lib depends on. Guile gives a wrong error message.

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