We should support both 1 and 2, not hard, just hasn't been done yet.

But first, let me ask about your use case: the "no memory base was
imported" message is too general (we should fix that), but it is there
because if there isn't a memory base, then memory isn't relocatable, and we
can't merge memories. So that can only work if the modules don't have
memory segments. Is that the case for you, it's just code, not data?

If you don't have data, then as a temporary workaround you can just import
the relocatable offsets, adding

  (import "env" "memoryBase" (global $memoryBase i32))
  (import "env" "tableBase" (global $tableBase i32))

But we should also make it work if those don't exist, assuming there is no
data.


On Wed, Nov 22, 2017 at 2:20 AM, <[email protected]> wrote:

> Hi,
>
> Our Faust compiler (faust.grame.fr) can directly generate wasm modules
> from the Faust DSP source code. We typically generate modules that need
> mathematical functions (log, sin, pow...) which are imported from the JS
> context (by generating the appropriate module "import" section).
>
> We would like to test our Faust generated wasm code using more
> optimized mathematical functions (so using a fast_log, fast_sin, fast_pow
> versions of the functions). Those functions are coded in a C++ file, then
> compiled as a wasm module using emcc -O3 -s WASM=1 -s
> SIDE_MODULE=1 fastmath.cpp -o fastmath.wasm.
>
> Then we tried to link the fastmath.wasm module using the wasm-merge tool,
> so doing (for a given pre-compiled Faust DSP filterBank.wasm module) : 
> wasm-merge
> filterBank.wasm fastmath.wasm, but we get the error : "Fatal: no memory
> base was imported"
>
> 1) is the wasm-merge tool ready for that kind of use case? If yes how it
> should be used?
>
> 2) will the wasm-merge code be part of the binaryen.js library, so that
> liking wasm modules could possibly dynamically be done in a Web page, or
> used in nodejs context for instance ?
>
> Thanks.
>
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