The docs are shown with `emcc --help`, also available here https://emscripten.org/docs/tools_reference/emcc.html
The syntax is a space, so --pre-js FILE.js See the test suite for working examples of all this stuff, can search for `--pre-js` in tests/*.py. If you want the function to be exportable on Module, then it's better to use `--js-library`, btw. Such functions are just normal JS system libraries, exportable in the usual way. On Wed, Apr 3, 2019 at 5:19 PM Brian Craft <[email protected]> wrote: > On review, this isn't quite correct. It wasn't --pre-js that fixed the > build error, it was moving the export from EXPORTED_FUNCTIONS to > EXTRA_EXPORTED_RUNTIME_METHODS. So, I don't have any evidence that it's > finding the methods in the --pre-js file. Adding random names to the > runtime method list doesn't generate any build-time error. > > On Wednesday, April 3, 2019 at 4:39:03 PM UTC-7, Brian Craft wrote: >> >> I haven't been able to find docs or examples for --pre-js. Can anyone >> point in the right direction? >> >> I worked out that it's "--pre-js=foo.js", not "--pre-js foo.js". I don't >> understand the module system, though, and can't access the functions >> defined in the file. >> >> I was expecting that I would add the functions >> to EXTRA_EXPORTED_RUNTIME_METHODS, and they would appear on Module. This >> seems to sort of half work: if I add a function >> to EXTRA_EXPORTED_RUNTIME_METHODS but fail to set --pre-js, the build will >> cough up an error, like >> >> shared:ERROR: undefined exported function: "fradixSortL16_64" >> >> After adding --pre-js, this build error disappears, so it seems to be >> finding the function during build, but the function is not available at run >> time on Module. >> > -- > 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]. > For more options, visit https://groups.google.com/d/optout. > -- 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]. For more options, visit https://groups.google.com/d/optout.
