Re: testing for library via C++ class

[Vladimir Panov]

tom fogal wrote:

> I can't seem to find the appropriate way to determine if a user has a
> particular library by trying to link with a class and a class method in
> that library.
>
> There is a certain static function in a library named 'vtkCommon' that
> I would like to check for. I'd like to have autoconf generate a program
> like:
>
> #include <vtk/vtkRectilinearGrid.h>
> int main() { vtkRectilinearGrid::New(); }
>
> and if it compiled/linked, then assume -lvtkCommon is in a std include
> path, add it to LIBS, etc. Unfortunately
>
> AC_CHECK_LIB(vtkCommon,[vtkRectilinearGrid::New()],,AC_MSG_ERROR(...))
>
> is failing because one needs to include the appropriate header or else
> compilation fails.
>
> How could I get behavior similar to AC_CHECK_LIB but with an additional
> include / other specified line? Maybe I'm making the wrong assumption
> that this should be 'easy', and I must AC_DEFINE my own macro to be
> testing this sort of thing...
>
> Thanks for any help/insights,
>
> -tom
>
>
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Hi, Tom.

For C++ libraries, you should use AC_LINK_IFELSE:

AC_LINK_IFELSE(
               [AC_LANG_PROGRAM(
                   [#include <vtk/vtkRectilinearGrid.h>],
                   [vtkRectilinearGrid::New()])],
               [],
               [AC_MSG_ERROR(...)])

Vlado