Interface.so: undefined symbol: sv_nv

[jplesnik]

The tests are failing because the deprecated C functions were removed in Perl 5.37.1.
More information could be found on perl5371delta.pod#Deprecations

#   Failed test 'use SDLx::App;'
#   at t/00-load.t line 88.
#     Tried to use 'SDLx::App'.
#     Error:  Can't load '/home/cpansand/.cpan/build/2022100913/SDL-2.548-0/blib/arch/auto/SDLx/Controller/Interface/Interface.so' for module SDLx::Controller::Interface: /home/cpansand/.cpan/build/2022100913/SDL-2.548-0/blib/arch/auto/SDLx/Controller/Interface/Interface.so: undefined symbol: sv_nv at /opt/perl-5.37.4/lib/5.37.4/x86_64-linux/DynaLoader.pm line 206.
#  at /home/cpansand/.cpan/build/2022100913/SDL-2.548-0/blib/lib/SDLx/Controller.pm line 10.
# Compilation failed in require at /home/cpansand/.cpan/build/2022100913/SDL-2.548-0/blib/lib/SDLx/Controller.pm line 10.
# BEGIN failed--compilation aborted at /home/cpansand/.cpan/build/2022100913/SDL-2.548-0/blib/lib/SDLx/Controller.pm line 10.
# Compilation failed in require at /opt/perl-5.37.4/lib/5.37.4/base.pm line 137.
# 	...propagated at /opt/perl-5.37.4/lib/5.37.4/base.pm line 159.
# BEGIN failed--compilation aborted at /home/cpansand/.cpan/build/2022100913/SDL-2.548-0/blib/lib/SDLx/App.pm line 23.
# Compilation failed in require at t/00-load.t line 88.
# BEGIN failed--compilation aborted at t/00-load.t line 88.
Bailout called.  Further testing stopped:  Test failed.  BAIL OUT!.
t/00-load.t ..................... 
Dubious, test returned 255 (wstat 65280, 0xff00)
Failed 1/43 subtests 

[jplesnik]

The definition of sv_nv in mathoms.c (Perl 5.36) is:

=for apidoc_section $SV
=for apidoc sv_nv

A private implementation of the C<SvNVx> macro for compilers which can't
cope with complex macro expressions.  Always use the macro instead.

=cut
*/

NV
Perl_sv_nv(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_NV;

    if (SvNOK(sv))
        return SvNVX(sv);
    return sv_2nv(sv);
}  

I tried to use SvNVX instead of sv_nv and it worked for me.

[ppisar]

Indeed. Perl removed sv_nv macro from embed.h in:

commit 7008caa915ad99e650acf2aea40612b5e48b7ba2
Author: Karl Williamson <khw@cpan.org>
Date:   Sat May 28 15:30:19 2022 -0600

    Remove deprecated functions
    
    Most of these have been deprecated for a long time; and we've never
    bothered to follow through in removing them.  This commit does that.

Which happened between Perl v5.37.0 and v5.37.1.