[fluid-dev] Current code overrides getopt.h declarations on Windows

[Carlo Bramini]

Hello,
when compiling Fluidsynth on Windows, the compiler prints these messages into 
the console:

[ 97%] Building C object src/CMakeFiles/fluidsynth.dir/fluidsynth.c.o
/home/Carlo/fluidsynth/src/fluidsynth.c:67:14: warning: 'optarg' redeclared 
with out dllimport attribute: previous dllimport ignored [-Wattributes]
 extern char *optarg;
              ^~~~~~
/home/Carlo/fluidsynth/src/fluidsynth.c:68:12: warning: 'optind' redeclared 
with out dllimport attribute: previous dllimport ignored [-Wattributes]
 extern int optind, opterr, optopt;
            ^~~~~~
/home/Carlo/fluidsynth/src/fluidsynth.c:68:20: warning: 'opterr' redeclared 
with out dllimport attribute: previous dllimport ignored [-Wattributes]
 extern int optind, opterr, optopt;
                    ^~~~~~
/home/Carlo/fluidsynth/src/fluidsynth.c:68:28: warning: 'optopt' redeclared 
with out dllimport attribute: previous dllimport ignored [-Wattributes]
 extern int optind, opterr, optopt;
                            ^~~~~~

and actually it is right, because inside src/fluidsynth.c these variables are 
re-declarated and the dllimport attribute applied to them inside getopt.h is 
lost.
Is there a particular reason for doing this thing?

Sincerely,

Carlo Bramini.