zdm has asked for the wisdom of the Perl Monks concerning the following question:

Hey, maybe somebody can help me to understand. why this error occurs. I am trying to build C++ code, that use <sstream> using Inline::CPP. Here is the example: 
#!/usr/bin/env perl

package main v0.1.0;

use strict;
use warnings;

use Inline(
    CPP => <<'CPP',
#undef seekdir

#include <sstream>
CPP
    # ccflags           => '-std=c++11',
    ccflags           => '-std=gnu++11',
    clean_after_build => 0,
    clean_build_area  => 0,
);

1;
__END__

[download]
This code compiled without errors under linux, but under strawberry perl 5.26.2 x64 it produce following error: 
D:\devel\perl\perl\lib\CORE/perl.h:3544:45: error: expected ')' before
+ '*' token
 #    define PERL_GET_THX  ((PerlInterpreter *)PERL_GET_CONTEXT)
                                             ^
D:\devel\perl\perl\lib\CORE/perl.h:3544:45: error: expected ')' before
+ '*' token
D:\devel\perl\perl\lib\CORE/perl.h:3544:45: error: expected ')' before
+ '*' token
D:\devel\perl\perl\lib\CORE/perl.h:3544:45: error: expected ')' before
+ '*' token
D:\devel\perl\perl\lib\CORE/perl.h:3544:29: error: expected ';' at end
+ of member declaration
 #    define PERL_GET_THX  ((PerlInterpreter *)PERL_GET_CONTEXT)

... and so on ...

[download]
Maybe somebody already solved similar problems?

Replies are listed 'Best First'.
Re: strawberry perl + Inline::CPP + <sstream> compilation error
by syphilis (Archbishop) on Jun 04, 2018 at 00:49 UTC
    Maybe somebody already solved similar problems?

    Or maybe not ?
    The failing script can be reduced to: 
    use strict;
use warnings;

use Inline CPP => <<'CPP';

#include <sstream>

CPP

1;

    [download]
    which (I think) still produces the same errors.

    This would suggest that there's some fundamental incompatibility between perl.h and the sstream header with mingw-w64 compilers.
    But it's not clear to me just what that incompatibility is. (We might need someone with some C++ insights to chime in.)

    Do you really need to include sstream ?

    UPDATE: For those interested, the original post has been cross-posted to stackoverflow.

    Cheers,
    Rob
[reply]
[d/l]
      <sstream> is used by dlib (dlib.net). I am using dlib in my project.
[reply]
        <sstream> is used by dlib (dlib.net). I am using dlib in my project

        I guess that means you'll need sstream ;-)

        There's a reply on stackoverflow that indicates that the problem is that one of the standard perl headers defines "setbuf".
        I find that the following compiles ok for me: 
        use strict;
use warnings;

use Inline CPP => <<'CPP';

#undef seekdir
#ifdef _WIN32
#undef setbuf
#endif
#include <sstream>

CPP

1;

        [download]
        So see how that works for you.

        Cheers,
        Rob
[reply]
[d/l]
Re: strawberry perl + Inline::CPP + <sstream> compilation error
by Anonymous Monk on Jun 03, 2018 at 22:02 UTC
    what compiler?
[reply]
      gcc 7.1 x64
[reply]

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