Regarding the shell quoting issue with EXPORTED_RUNTIME_METHODS/EXPORTED_FUNCTIONS, these days you can avoid all the quotes and just use simple comma separated lists:
e.g: -sEXPORTED_FUNCTIONS=_int_sqrt -sEXPORTED_RUNTIME_METHODS=ccall,cwrap On Fri, Jul 2, 2021 at 6:53 PM Gary Stuart <[email protected]> wrote: > So I figured out that Module was not defined. > > And after a lot of failed examples, found this code that works... > <script type="module"> > import Module from '../cpp/sqrt2/example.js' > Module().then(function(mymod) { > console.log("Module Loaded") > const int_sqrt = mymod.cwrap('int_sqrt', 'number', ['number']); > console.log(int_sqrt(64)); > }); > </script> > > when compiled with: > emcc example.cpp -o example.js -s EXPORTED_FUNCTIONS="['_int_sqrt']" -s > EXPORTED_RUNTIME_METHODS="['ccall', 'cwrap']" -s EXPORT_ES6=1 -s > MODULARIZE=1 > > Now I just need to figure out how to split it up. > I want the call to int_sqrt to be callable from a javascript function > > Thanks > > > On Friday, July 2, 2021 at 3:21:28 PM UTC-6 Gary Stuart wrote: > >> Okay, so I took an example: >> >> #include <math.h> >> extern "C" { >> int int_sqrt(int x) { >> return sqrt(x); >> } >> } >> >> and put it in the file hello_function.cpp >> >> I ran their command, in an emcmdprompt, and it produced errors: >> emcc hello_function.cpp -o function.html -s >> EXPORTED_FUNCTIONS='["_int_sqrt"]' >> -s EXPORTED_RUNTIME_METHODS='["ccall","cwrap"]' >> >> I found that swapping the double and single quotes solved that problem: >> emcc hello_function.cpp -o function.html -s >> EXPORTED_FUNCTIONS="['_int_sqrt']" -s >> EXPORTED_RUNTIME_METHODS="['ccall','cwrap']" >> >> I put this line in the html file: >> <script type="text/javascript" src="/cpp/sqrt/function.js"></script> >> >> When I load the html file I get lots of errors: >> Uncaught (in promise) TypeError: Cannot read property 'apply' of undefined >> at Module._emscripten_stack_init (function.js:1832) >> at stackCheckInit (function.js:2104) >> at run (function.js:2116) >> at runCaller (function.js:2095) >> at removeRunDependency (function.js:1451) >> at receiveInstance (factorial.js:1) >> at receiveInstantiationResult (factorial.js:1) >> >> Module._emscripten_stack_init @ function.js:1832 >> stackCheckInit @ function.js:2104 >> run @ function.js:2116 >> runCaller @ function.js:2095 >> removeRunDependency @ function.js:1451 >> receiveInstance @ factorial.js:1 >> receiveInstantiationResult @ factorial.js:1 >> function.js:1477 Uncaught (in promise) RuntimeError: abort(Assertion >> failed: undefined) at Error >> at jsStackTrace (function.js:1755) >> at stackTrace (function.js:1772) >> at abort (function.js:1471) >> at assert (function.js:678) >> at removeRunDependency (function.js:1438) >> at receiveInstance (function.js:1630) >> at receiveInstantiationResult (function.js:1647) >> at abort (function.js:1477) >> at assert (function.js:678) >> at removeRunDependency (function.js:1438) >> at receiveInstance (function.js:1630) >> at receiveInstantiationResult (function.js:1647) >> >> >> As to setup `Module['onRuntimeInitialized']` early on >> I'm not sure of the proper syntax. I tried >> >> <script> >> Module['onRuntimeInitialized'] = onRuntimeInitializedFactorial; >> </script> >> >> and I get the error: >> Uncaught ReferenceError: Module is not defined >> >> I feel like I'm missing something really basic that the rest of you just >> take for granted.... >> >> I look forward to more clarification >> >> On Friday, July 2, 2021 at 2:53:15 PM UTC-6 [email protected] wrote: >> >>> Also, I believe you need to setup `Module['onRuntimeInitialized']` early >>> on, like at the top level of your script, preferably even before the module >>> JS file is imported. IIUC, you need to make sure you register this >>> callback before the module is actually initialized, otherwise it might >>> never be called. >>> >>> On Fri, Jul 2, 2021 at 1:05 PM Alon Zakai <[email protected]> wrote: >>> >>>> To use cwrap(), you must export it. See >>>> >>>> >>>> https://emscripten.org/docs/api_reference/preamble.js.html?highlight=cwrap >>>> >>>> You can also run an example from the tutorial, which I verified now, >>>> >>>> >>>> https://emscripten.org/docs/porting/connecting_cpp_and_javascript/Interacting-with-code.html?highlight=cwrap#interacting-with-an-api-written-in-c-c-from-nodejs >>>> >>>> It does have one typo which I'll fix now, the require should be of >>>> "api_example.js". >>>> >>>> On Fri, Jul 2, 2021 at 11:25 AM Gary Stuart <[email protected]> >>>> wrote: >>>> >>>>> Hi, >>>>> >>>>> I am trying to use emscripten on Windows 10. >>>>> I have an existing Javascript client application that works. >>>>> I want to connect in c++ code, and be able to call those c++ functions >>>>> when needed. >>>>> I have spent 1.5 days and can't even make a simple example work. >>>>> >>>>> I am using emcc version: 2.0.25 (Online the latest version seems to be >>>>> 2.0.21???) >>>>> I am using Chrome >>>>> >>>>> My example: >>>>> function factorial() >>>>> { >>>>> console.log("MT:F") >>>>> Module.onRuntimeInitialized = _ => { >>>>> console.log("A") >>>>> >>>>> const factorialCpp = Module.cwrap('factorial', 'number', >>>>> ['number']); >>>>> console.log(factorialCpp) >>>>> var result = factorialCpp(10); >>>>> console.log(result) >>>>> }; >>>>> console.log("MT:F-E") >>>>> } >>>>> >>>>> When I call this function, I get only the "MT:F" and "MT:F-E", and no >>>>> errors in browser console. >>>>> >>>>> My compile line: >>>>> emcc -O3 -s WASM=1 -s EXPORTED_RUNTIME_METHODS='["cwrap"]' -s >>>>> EXPORTED_FUNCTIONS="['_factorial']" factorial.cpp factorial-service.cpp -o >>>>> factorial.js >>>>> >>>>> If optimization is -O0, it complains about the cwrap export >>>>> >>>>> I have also tried: >>>>> function factorial2() >>>>> { >>>>> Module['onRuntimeInitialized'] = onRuntimeInitializedFactorial; >>>>> >>>>> const factorialCpp = Module.cwrap('factorial', 'number', ['number']); >>>>> >>>>> function onRuntimeInitializedFactorial() >>>>> { >>>>> console.log("MT:F") >>>>> console.log("A") >>>>> var result = factorialCpp(10); >>>>> console.log(result) >>>>> console.log("MT:F-E") >>>>> } >>>>> } >>>>> >>>>> and: >>>>> function factorial3() >>>>> { >>>>> var factorialCpp = Module.cwrap("factorial", "number", ["number"]); >>>>> var result = factorialCpp(10); >>>>> } >>>>> >>>>> Both produce an error: Uncaught TypeError: Module.cwrap is not a >>>>> function >>>>> >>>>> I have found over 20 examples, that say just do this or that, but >>>>> nothing works. >>>>> Maybe my environment has a config issue? >>>>> >>>>> I would appreciate any any guidance on this. >>>>> Thanks, >>>>> Gary >>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "emscripten-discuss" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/emscripten-discuss/56840ae5-46b1-458d-b30f-27ee5433fd39n%40googlegroups.com >>>>> <https://groups.google.com/d/msgid/emscripten-discuss/56840ae5-46b1-458d-b30f-27ee5433fd39n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "emscripten-discuss" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> >>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/emscripten-discuss/CAEX4NpQ21Yoyvy_xzrLkBTWmvEQoyVWc0fG3kAMmgx%3DmrhxE9g%40mail.gmail.com >>>> <https://groups.google.com/d/msgid/emscripten-discuss/CAEX4NpQ21Yoyvy_xzrLkBTWmvEQoyVWc0fG3kAMmgx%3DmrhxE9g%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- > You received this message because you are subscribed to the Google Groups > "emscripten-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/emscripten-discuss/673eb80c-f9b7-45a9-a73b-5080ba61dfccn%40googlegroups.com > <https://groups.google.com/d/msgid/emscripten-discuss/673eb80c-f9b7-45a9-a73b-5080ba61dfccn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/emscripten-discuss/CAL_va2_O2r_uq%2BHvkvrCp5usJTtPnF449Sdc9Pd%3D9kP7qXM24w%40mail.gmail.com.
