Dear Guile Users!
I wonder if one of you might be able to help me understand how
GUILE_EXTENSIONS_PATH is supposed to find shared libraries. My understanding
from reading the docs is that using the GUILE_EXTENSIONS_PATH variable is the
preferred way to do this as of guile 3.0.6
From the docs:
Unless library denotes an absolute file name or otherwise contains a directory
separator (/, and also \ on Windows), Guile will search for the library in the
directories listed in search-paths. The default search path has three
components, which can all be overridden by colon-delimited (semicolon on
Windows) environment variables:
I'm using `guile-3.0.9` from `guix` and my program doesn't seem to be able to
locate the shared library. Initially I thought it might have to do with guile
not picking up the GUILE_EXTENSION_PATH variable correctly from the environment.
At the moment, I'm just trying to run a very simple program:
(use-modules (system foreign-library))
(load-foreign-library "libpd")
To be clear, it seems to work fine if I set the variable and start an
interactive bash session and from there launch guile. However, I'd like to be
able to run the program directly like the following:
guix shell -m manifest -- guile -s src/main.scm
This seems to _not_ pick up the GUILE_EXTENSION_PATH variable as expected.
Probably I'm missing something obvious about how guile starts up from within
a guix shell. I tried the invocation:
guix shell -m manifest -- \
env GUILE_EXTENSION_PATH=$GUIX_ENVIRONMENT/lib \
guile
-s src/main.scm
And was surprised to see that it doesn't pick up GUIX_ENVIRONMENT - I guess this
makes sense as the environment probably hasn't been loaded yet?
So back in guile land, I tried to set the GUILE_EXTENSION_PATH variable from an
interactive guile session:
scheme@(guile-user)> (setenv "GUILE_EXTENSIONS_PATH" (string-append (getenv
"GUIX_ENVIRONMENT") "/lib"))
And tried to load the libary:
scheme@(guile-user)> (use-modules (system foreign-library))
scheme@(guile-user)> (load-foreign-library "libpd")
ice-9/boot-9.scm:1685:16: In procedure raise-exception:
In procedure dlopen: file "libpd.so", message "libpd.so: cannot open shared object
file: No such file or directory"
But it's definitely there:
scheme@(guile-user)> (load-foreign-library (string-append (getenv
"GUILE_EXTENSIONS_PATH") "/libpd"))
$3 = #<<foreign-library> filename:
"/gnu/store/25m9fzb29dqi5r3pvigpcdvv2hrz8w8b-profile/lib/libpd" handle: #<pointer
0x19d60c60>>
Anyway, I can probably find a workaround for this, but I'm just wondering if I
miss something? Any help would be much appreciated!
Regards,
Adam
--
Adam McCartney - https://admccartney.mur.at
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