Thanks for taking the time to check it. The hint about the virtual
'layer' class is valuable.
I will look into it.
Best Regards,
V.Nikolaidis
PS I am tempted to set up a Debian test platform to speed up fixing the
package.
(Or abandon submitting the package to CRAN alltogether.)
Στις 2023-02-20 22:06, Dirk Eddelbuettel έγραψε:
On 20 February 2023 at 21:41, Vasileios Nikolaidis wrote:
| Oh yes thank you. I just realized I did not mention the repo on my
| previous reply. It is
| https://github.com/VNNikolaidis/nnlib2Rcpp
Thanks for that -- I can confirm the error.
The packages compiles all source files without issue or warnings (under
my
default flags), links and then fails to load with the error you
reported:
** testing if installed package can be loaded from temporary location
Error: package or namespace load failed for ‘nnlib2Rcpp’ in
dyn.load(file, DLLpath = DLLpath, ...):
unable to load shared object
'/tmp/rcpp/lib/00LOCK-nnlib2Rcpp/00new/nnlib2Rcpp/libs/nnlib2Rcpp.so':
/tmp/rcpp/lib/00LOCK-nnlib2Rcpp/00new/nnlib2Rcpp/libs/nnlib2Rcpp.so:
undefined symbol: _ZTIN6nnlib25layerE
Error: loading failed
Execution halted
ERROR: loading failed
Now, `c++filt` on that symbol reveals
$ c++filt _ZTIN6nnlib25layerE
typeinfo for nnlib2::layer
$
and a glance at your header nnlib2::layer reveals that the class is
virtual.
I don't have time right to do more digging but if I had to guess you
may have
a slip up somewhere in your classes: something that worked beforehand
with
your virtual (abstract) classes and derived (concrete) classes now
seems to
want an concrete instance of 'layer'. And if I had to guess some more
the
reason this works in Windows is that the linker there is more lenient.
Maybe you can try an earlier version of nnlib2Rcpp and then bisect the
changes. rhub gives you (fairly) easy access to Linux machines for
builds
outside of your main Windows machine.
Sorry I cannot be of more help right now.
Dirk
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