Hi Tommy,
* Tommy Nordgren wrote on Fri, Jul 22, 2005 at 08:37:20PM CEST:
> I am trying co set up an open source library based on the GNU
> Autotools, so it will build a C++ version of the
> library as well.
This sounds like a rather bad idea. Why do you want to do it?
You can call your C library functions from C++ code.
> I wonder what is necessary to do to support this. My
> C++ files are defined like this:
> //File test.cp
> #define LIB_COMPILE_AS_CPLUSPLUS
> #include "test.c"
>
> Then in the headers I changed the following:
>
> #ifdef __cpluplus
> #define BEGIN_DECLS extern "C" {
> #define END_DECLS }
> #else
>
> To this:
> #ifdef __cpluplus
> # ifdef LIB_COMPILE_AS_CPLUSPLUS
> # define BEGIN_DECLS
> # define END_DECLS
> # else
> # define BEGIN_DECLS extern "C" {
> # define END_DECLS }
> # endif
> #else
If you need C++ functions to make use of some C++ features, it is
generally advisable to write (a) wrapper class(es) to encapsulate
the C functions, if possible.
> Now I wan't to do necessary modifications to the build
> infrastrucuture to support this. I obviously need to modify
> configure.ac and the several instances of Makefile.am to do this. By
> the way, the library I'm trying to build this way is the GSL
> numerical library.
If you write a C++ wrapper for it (given that none exists already, be
sure to check!), the GSL people would probably be happy to include it
in their software distribution.
Cheers,
Ralf
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