From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 10442 invoked by alias); 7 May 2006 22:53:00 -0000 Received: (qmail 10434 invoked by uid 22791); 7 May 2006 22:53:00 -0000 X-Spam-Check-By: sourceware.org Received: from nf-out-0910.google.com (HELO nf-out-0910.google.com) (64.233.182.186) by sourceware.org (qpsmtpd/0.31) with ESMTP; Sun, 07 May 2006 22:52:57 +0000 Received: by nf-out-0910.google.com with SMTP id a4so75348nfc for ; Sun, 07 May 2006 15:52:54 -0700 (PDT) Received: by 10.49.92.2 with SMTP id u2mr707492nfl; Sun, 07 May 2006 15:52:54 -0700 (PDT) Received: by 10.49.92.6 with HTTP; Sun, 7 May 2006 15:52:54 -0700 (PDT) Message-ID: <5b7094580605071552x7d5b5c50ue777a374b2a308a8@mail.gmail.com> Date: Sun, 07 May 2006 22:53:00 -0000 From: "Brian Budge" To: "Perry Smith" Subject: Re: gcc linking and address of template function Cc: gcc-help In-Reply-To: <6FFD3C7B-3315-4FDE-8C09-508D3979C604@easesoftware.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Content-Disposition: inline References: <5b7094580605051429j3b4577c5o7d46dfb7f36fbc17@mail.gmail.com> <6FFD3C7B-3315-4FDE-8C09-508D3979C604@easesoftware.com> X-IsSubscribed: yes Mailing-List: contact gcc-help-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-help-owner@gcc.gnu.org X-SW-Source: 2006-05/txt/msg00079.txt.bz2 Hi Perry - Here are the errors I'm getting: test/tester.o: In function `STLocate2, double, CCStencil, BSphere >::operator()(BSphere const&, bool)': tester.cc:(.gnu.linkonce.t._ZN9STLocate2IN8OpenMesh21PolyMesh_ArrayKernelTI= NS0_13DefaultTraitsEEEd22CCStencil7BSphereIdLi2ENS0_10FaceHandleEEEclERKS7_= b+0x30e): undefined reference to `ll_uv_f(gsl_vector const*, void*, gsl_vector*)' tester.cc:(.gnu.linkonce.t._ZN9STLocate2IN8OpenMesh21PolyMesh_ArrayKernelTI= NS0_13DefaultTraitsEEEd22CCStencil7BSphereIdLi2ENS0_10FaceHandleEEEclERKS7_= b+0x318): undefined reference to `ll_uv_df(gsl_vector const*, void*, gsl_matrix*)' tester.cc:(.gnu.linkonce.t._ZN9STLocate2IN8OpenMesh21PolyMesh_ArrayKernelTI= NS0_13DefaultTraitsEEEd22CCStencil7BSphereIdLi2ENS0_10FaceHandleEEEclERKS7_= b+0x322): undefined reference to `ll_uv_fdf(gsl_vector const*, void*, gsl_vector*, gsl_matrix*)' Note I've only instantiated my classes with the template type =3D CCStencil, so there aren't any errors regarding BSStencil. When I do an nm on one of my .o files (which is on the link line), I get th= is: 00000000 W _Z7ll_uv_fI21BSStencilEiPK10gsl_vectorPvPS1_ 00000000 W _Z7ll_uv_fI22CCStencilEiPK10gsl_vectorPvPS1_ 00000000 W _Z8ll_uv_dfI21BSStencilEiPK10gsl_vectorPvP10gsl_matrix 00000000 W _Z8ll_uv_dfI22CCStencilEiPK10gsl_vectorPvP10gsl_matrix 00000000 W _Z9ll_uv_fdfI21BSStencilEiPK10gsl_vectorPvPS1_P10gsl_matrix 00000000 W _Z9ll_uv_fdfI22CCStencilEiPK10gsl_vectorPvPS1_P10gsl_matrix nm --demangle gives: 00000000 W int ll_uv_f(gsl_vector const*, void*, gsl_vector*) 00000000 W int ll_uv_f(gsl_vector const*, void*, gsl_vector*) 00000000 W int ll_uv_df(gsl_vector const*, void*, gsl_matrix*) 00000000 W int ll_uv_df(gsl_vector const*, void*, gsl_matrix*) 00000000 W int ll_uv_fdf(gsl_vector const*, void*, gsl_vector*, gsl_matrix*) 00000000 W int ll_uv_fdf(gsl_vector const*, void*, gsl_vector*, gsl_matrix*) Thanks! Brian On 5/7/06, Perry Smith wrote: > I may be right in front of my face but I don't see it. Can you send > a couple lines of what the link's error messages are like? > > On May 5, 2006, at 4:29 PM, Brian Budge wrote: > > > Hi all - > > > > I'm attempting to use gsl (gnu scientific library) from my C++ > > program. gsl is a C program, and I need to pass function pointers to > > gsl to make it do it's magic on my data. > > > > The problem I'm having stems from the fact that I need my functions to > > be template functions. > > > > I can get everything to compile, but I can't get it to link. > > > > The gist is like this: > > > > template > > int ll_uv_f(const gsl_vector *x, void *params, gsl_vector *f){ > > LL_uv_data *lld =3D static_cast< LL_uv_data* > > > (params); > > const real a =3D gsl_vector_get(x,0); > > const real b =3D gsl_vector_get(x,1); > > Vec v =3D lld->ll->eval(a, b) - lld->pt; > > for(int i =3D 0; i < 2; ++i){ > > gsl_vector_set(f, i, v[i]); > > } > > return GSL_SUCCESS; > > } > > > > template > > int ll_uv_df(const gsl_vector *x, void *params, gsl_matrix *J){...} > > > > template > > int ll_uv_fdf(const gsl_vector *x, void *params, gsl_vector *f, > > gsl_matrix *J){...} > > > > The calling function then contains the code: > > > > LL_uv_data dat(Vec(u,v), this); > > gsl_multiroot_function_fdf f =3D {ll_uv_f, > > ll_uv_df, > > ll_uv_fdf, > > 2, &dat}; > > > > I also explicitly instantiate the template functions for several > > instances in a .cc file: > > > > //explicit instantiation of template functions > > template int ll_uv_fdf(const gsl_vector *x, void *params, > > gsl_vector *f, gsl_matrix *J); > > template int ll_uv_fdf(const gsl_vector *x, void *params, > > gsl_vector *f, gsl_matrix *J); > > . > > . > > . > > template int ll_uv_df(const gsl_vector *x, void *params, > > gsl_matrix *J); > > template int ll_uv_df(const gsl_vector *x, void *params, > > gsl_matrix *J); > > . > > . > > . > > template int ll_uv_f(const gsl_vector *x, void *params, > > gsl_vector *f); > > template int ll_uv_f(const gsl_vector *x, void *params, > > gsl_vector *f); > > . > > . > > . > > > > The program compiles fine, and the functions int ll_uv_*() are found > > by the nm utility to be in a .o file. > > > > The program still won't link. Anyone have any ideas? Is this > > something I'm doing wrong? The gcc version is 3.4.5-r1, and this is > > on a xeon box running linux. > > > > Thanks, > > Brian > > > >