c:\msys\1.0\local the right location ? Really ? it seems a odd location
anyway just add the include directores to the CXXFLAGS before starting dosbox.

dosbox uses the default search path of the compiler.......

OK, thanks! I've added the option "-I/usr/local/include" (this is the "C:\Msys\1.0\local\include" path under MSys environment) and it works now. But I'm wondering why it gets the SDL and SDL_net includes from that location without explicitly adding the path...

well it's always a bugger to get going.

SDL paths are detected through the sdl-config tool SDL installs which the configure tool runs.

Thanks a lot for all your answers. Just only one more question: assumed that you use MinGW to compile DOSBox... what did you do to compile against the SDL_sound library ? I get a bunch of errors when building the library related to string.h and math.h definition conflicts (duplicated definitions):

../.libs/libSDL_sound.a(libmpglib_la-interface.lo)(.text+0x50): In function `_isnan':
C:/MSYS/mingw/bin/../lib/gcc/mingw32/3.4.2/../../../../include/math.h:338: multiple definition of `__isnan'

I've seen out there that it's a common problem (not only mine) with latest MinGW, but I didn't find any solution.

well the trouble is sdl_sound itself.

it has a lot of problem and we had to modify it source.

I recall that you have to modify the file sdl_sound_internal.h
and look for a undefinition of inline

that is wrong and should be a defintion.

> I recall that you have to modify the file sdl_sound_internal.h
> and look for a undefinition of inline that is wrong and should
> be a defintion.

It was just the opposite 🙄 (change a #define into an #undef) so it now works 😊 . Thanks again!