Re: GIT version: missing linking flag

[Hans Aberg]

On 21 Jan 2011, at 17:02, Ludovic Courtès wrote:

> > > Can you post the exact link command line and error message?
> >
> >
> > $ make
> > gcc parser.o lexer.o driver.o guile++.o guile.o exception.o tuple.o
> > guile-config link` -lstdc++ -o guile++
>
> This line was mangled by your mailer, I think (missing backquote,
> newline inserted).

By your mailer, I would think: when I send it to myself, it comes out  
right.

> Furthermore, if you’re linking C++ code, then you should link with g+ 
> +,
> not gcc, and omit -lstdc++.

I do not think it matters: the linker typically supplied by the  
platform, is a C linker on UNIX, and gcc mangles the names of C++ into  
it C.

By contrast, g++ compiles also C files as C++.

> > Undefined symbols:
> >  "_GC_register_finalizer_no_order", referenced from:
> >      _make_c_exception in exception.o
> >      _make_exception in exception.o
> >      _make_tuple in tuple.o
> > ld: symbol(s) not found
>
> Oooh, I finally got your point about SCM_NEWSMOB.  It introduces a
> direct dependency from your app on libgc, which can require -lgc,
> depending on the linker.

Right.

> I’ll look into it.  I think the GC_REGISTER_FINALIZER_NO_ORDER call
> should be buried in a function akin to scm_i_new_smob_with_mark_proc.

If it is needed at all, by the comment in gc/gc.h something that it is  
for Java code.