[Gambas-user] Cannot find proprietary shared libraries.

[PICCORO McKAY Lenz]

yes you can using multiarch in DEBIAN, see apt manpage, in my venenux the
multiarch are set automatically i cannot remenber how right now but yes it
can be done!

Lenz McKAY Gerardo (PICCORO)
http://qgqlochekone.blogspot.com

2018-06-05 13:38 GMT-04:00 ML <d4t4full at gmail.com>:

> On 05/06/18 09:10, Benoît Minisini wrote:
> > Le 05/06/2018 à 14:02, ML a écrit :
> >> Guys, need help accessing proprietary shared libs from Gambas
> >> (v3.11.2) from PPA in Ubuntu 16.04 x64.
> >> I've been given -after signing an NDA with a company- a couple of
> >> development .so files.
> >> I placed these .so files in a subfolder inside my home folder.
> >> I've put this path inside a .conf file, put this .conf file inside
> >> /etc/ld.so.conf.d and ran ldconfig as superuser.
> >> I verified the libs and their location are in the cache by grepping
> >> the output from ldconfig -p: They are both there.
> >> But alas! Gambas cannot find them. I have this sample code (sorry,
> >> cannot give real code details 'cos of the NDA):
> >> Lib call declaration in a module (say it is called modLib):
> >>
> >>    'The call name used is the actual call name, respecting
> >> upper/lowercase, ie: no need for EXEC.
> >>    Public Extern SomeLib_GetVersion(versionStrPtr As Pointer) In
> >> "libName"
> >>
> >> I also have a form with -appx- the following code:
> >>
> >>    Public Sub Form_Open()
> >>      Dim libVersion As String = String(128, " ")
> >>      Dim strPtr As Pointer = VarPtr(libVersion)
> >>      Try modLibrary.SomeLib_GetVersion(strPtr)
> >>      If (Error.Code) Then
> >>        Message.Error(Error.Text)
> >>      End If
> >>    End
> >>
> >> When I call this from a form, I get the following error:
> >> Cannot find dynamic library 'libName.so': libName.so: cannot open
> >> shared object file: No such file or directory
> >> Now, I've seen lib names with a trailing colon and (version?) number.
> >> I don't know how or where can I get this info from, or if I need them.
> >> How can I get Gambas able to find and use these .so files?
> >> Regarding these trailing ":<number>" in EXTERN declarations: How do I
> >> find these out, and how do I know whether I need them or not?
> >
> > The name of the library is directly passed to the dlopen() function,
> > and the error you get is the error returned by dlopen().
> > The "<number>" after the colon is just the version number of the
> > shared library. You find it in the name of the shared library symbolic
> > link. You have to specify it only if you have multiple versions of the
> > same library, or if you requested a specific feature of a specific
> > version of the library.
> > Regards,
>
> Benoît,
>
> Thanks a ton for the tips.
> Further investigation led me to find the root of all evil (this means I
> wrote and compiled a quick&dirty C 'hello world' targeting the libraries
> and compiled 32 and 64 bit versions; 32bit worked and 64bit did not
> giving the same error as Gambas).
> Libs are 32bit, my OS is 64bit. Using a virtual Ubuntu (32bit) inside my
> Ubuntu (64bit), the 32bit virtual Gambas version works as expected.
>
> Beware, probably stupid question: Is there a way I can install a 32bit
> Gambas alongside a 64bit Gambas in my 64bit OS?
>
>
>
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>
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