Hi Perry -
Here are the errors I'm getting:
test/tester.o: In function
`STLocate2<OpenMesh::PolyMesh_ArrayKernelT<OpenMesh::DefaultTraits>,
double, CCStencil, BSphere<double, 2, OpenMesh::FaceHandle>
::operator()(BSphere<double, 2, OpenMesh::FaceHandle> const&, bool)':
tester.cc:(.gnu.linkonce.t._ZN9STLocate2IN8OpenMesh21PolyMesh_ArrayKernelTINS0_13DefaultTraitsEEEd22CCStencil7BSphereIdLi2ENS0_10FaceHandleEEEclERKS7_b+0x30e):
undefined reference to `ll_uv_f(gsl_vector const*, void*,
gsl_vector*)'
tester.cc:(.gnu.linkonce.t._ZN9STLocate2IN8OpenMesh21PolyMesh_ArrayKernelTINS0_13DefaultTraitsEEEd22CCStencil7BSphereIdLi2ENS0_10FaceHandleEEEclERKS7_b+0x318):
undefined reference to `ll_uv_df(gsl_vector const*, void*,
gsl_matrix*)'
tester.cc:(.gnu.linkonce.t._ZN9STLocate2IN8OpenMesh21PolyMesh_ArrayKernelTINS0_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 =
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 this:
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<BSStencil>(gsl_vector const*, void*, gsl_vector*)
00000000 W int ll_uv_f<CCStencil>(gsl_vector const*, void*, gsl_vector*)
00000000 W int ll_uv_df<BSStencil>(gsl_vector const*, void*, gsl_matrix*)
00000000 W int ll_uv_df<CCStencil>(gsl_vector const*, void*, gsl_matrix*)
00000000 W int ll_uv_fdf<BSStencil>(gsl_vector const*, void*,
gsl_vector*, gsl_matrix*)
00000000 W int ll_uv_fdf<CCStencil>(gsl_vector const*, void*,
gsl_vector*, gsl_matrix*)
Thanks!
Brian
On 5/7/06, Perry Smith <pedz@xxxxxxxxxxxxxxxx> 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<class Stencil>
> int ll_uv_f(const gsl_vector *x, void *params, gsl_vector *f){
> LL_uv_data<Stencil> *lld = static_cast< LL_uv_data<Stencil>* >
> (params);
> const real a = gsl_vector_get(x,0);
> const real b = gsl_vector_get(x,1);
> Vec v = lld->ll->eval(a, b) - lld->pt;
> for(int i = 0; i < 2; ++i){
> gsl_vector_set(f, i, v[i]);
> }
> return GSL_SUCCESS;
> }
>
> template<class Stencil>
> int ll_uv_df(const gsl_vector *x, void *params, gsl_matrix *J){...}
>
> template<class Stencil>
> 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<BaseStencil> dat(Vec(u,v), this);
> gsl_multiroot_function_fdf f = {ll_uv_f<BaseStencil>,
> ll_uv_df<BaseStencil>,
> ll_uv_fdf<BaseStencil>,
> 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<CCStencil>(const gsl_vector *x, void *params,
> gsl_vector *f, gsl_matrix *J);
> template int ll_uv_fdf<BSStencil>(const gsl_vector *x, void *params,
> gsl_vector *f, gsl_matrix *J);
> .
> .
> .
> template int ll_uv_df<CCStencil>(const gsl_vector *x, void *params,
> gsl_matrix *J);
> template int ll_uv_df<BSStencil>(const gsl_vector *x, void *params,
> gsl_matrix *J);
> .
> .
> .
> template int ll_uv_f<CCStencil>(const gsl_vector *x, void *params,
> gsl_vector *f);
> template int ll_uv_f<BSStencil>(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
>
