On Saturday, 24 December 2016 at 19:58:45 UTC, Jake Pittis wrote:
I'm posting this in Learn because I'm assuming I've done
something wrong rather than discovered a bug.
You need to pass all modules you use to the linker somehow.
Easiest is to `dmd main.d linking_succeeds.d linking_fails.d`
just pass them all to dmd at once.
Alternatively, you can compile all separately with `dmd -c` then
you link them all with `dmd main.o linking_succeeds.o
linking_fails.o` or put them in a lib etc.
In the `linking_fails.d` file, if I replace the stdio import
with `import std.algorithm`, running `dmd -main main.d`
succeeds. Somehow stdio is causing the linker to fail.
You should pass all at once, but the reason why it sometimes
works and sometimes doesn't is that std.stdio has a module
constructor and algorithm doesn't. Since the module constructor
is there, it becomes a load time dependency and requires the
module info be present even with nothing else used.
