On 06/15/2017 12:20 PM, Philipp Stephani wrote:
> we might even compile emacs-modules.c as C++ unconditionally. I guess 
> by now every system that has a C compiler and supports shared 
> libraries also has a C++ compiler.

Although C++ compilers may be available, they (or their libraries) are 
not necessarily installed properly, and this can be a problem at runtime 
as well as at compile-time. So it may be better to stick with C if it works.

> (i.e. this doesn't even need --enable-gcc-warnings)
>

Ah, that's key. Although 'configure' suppresses that false alarm if 
--enable-gcc-warnings is specified, it also needs to suppress it when 
--enable-gcc-warnings is *not* specified. I installed the attached, 
which I hope fixes the warnings that were annoying you (assuming we are 
not using -save-temps, which is a reasonable assumption).