Example requires setting wasm_multi_value

[plicease]

This example doesn't work without setting the wasm_multi_value option on the config object.

[alexcrichton]

In theory this is no longer needed since #1667, were you testing with an older version of the wasmtime C API though?

[plicease]

Originally I was trying it will 0.16.0, but I get the same thing with 8f2d442

helix% gcc -I/Users/ollisg/opt/wasmtime/dev-8f2d442/include examples/multi.c -L/Users/ollisg/opt/wasmtime/dev-8f2d442/lib -lwasmtime
helix% ./a.out 
Initializing...
Compiling module...
error: failed to compile module
invalid result arity: func type returns multiple values (at offset 41)

[alexcrichton]

Hm so testing master I can get the panic you reproted in #1716, but I don't get invalid result arity: func type returns multiple values (at offset 41). Are you sure there wasn't a mixup of which version of wasmtime was installed where?

[alexcrichton]

(also if you're linking dynamically, are you sure that the library at link-time is also selected at load-time?)

[plicease]

(also if you're linking dynamically, are you sure that the library at link-time is also selected at load-time?)

Ah yes. I updated the flags to the compiler but forgot to update the dynamic linker path.

[plicease]

This was my goof, but it would have been easier to diagnose if the version information were available in the dynamic library (and the .h file for C/C++). I'd love to see something implemented for #986