Re: Do we need "DEFINES=-DWIN32 -DGSL_DLL" in the Makefile of the gsl package?

[Julien Bect]

Le 05/09/2016 à 15:47, Michael Goffioul a écrit :
> The necessity of GSL_DLL macro is to deal with DLL-exported variables 
> (not functions) and MSVC compiler (and other compilers that use the 
> same dynamic linking rules).
>
> A DLL-exported function can be found by the linker using 2 symbols: 
> NAME and _imp_NAME. A DLL-exported variable can only be found by the 
> linker with _imp_VAR. When using MSVC, if the variable is not 
> decorated with __declspec(dllimport), the linker will fail. When using 
> GCC, the linker uses some magic bootstrap to make the variable be 
> found by the linker with VAR symbol only.
>
> Keeping the define's is harmless with GCC (as GCC can deal with MSVC 
> conventions).

Hi Michael,

Thank you for the explanation.

Would someone using MSVC tools be able to run the configure script 
(which is need to create config.h and to determine @MKOCTFILE@ and 
@canonical_host_type@ in Makefile.in) ?

@++
Julien