https://dlang.org/spec/attribute.html#gshared
However, you should be using the module system for accessing
globals, rather than redeclaring them.
If the module system is dumped, and evrything put into one file,
works perfectly.
With or without __gshared in from of 'int xvar'.
int xvar;
void main() {
import std.stdio;
writeln("Entering: main");
xvar = 1;
writeln("xvar=", xvar);
testsub();
writeln("xvar=", xvar);
writeln("Leaving: main");
}
void testsub() {
import std.stdio;
writeln("Entering: testsub");
writeln("xvar=", xvar);
xvar = 2;
writeln("xvar=", xvar);
writeln("Leaving: testsub");
}
