Hi Benjamin, I would be happy if Emscripten had something like what you propose, but just let me share how we deal with these issues:
If you use cmake then the Emscripten toolchain file defines EMSCRIPTEN_VERSION ( https://github.com/emscripten-core/emscripten/blob/ceacba11/cmake/Modules/Platform/Emscripten.cmake#L128), which you can use to direct compilation through cmake=>preprocessor defines. You unfortunately still have to check the changelog or Emscripten history manually to find out when each feature was introduced/changed. For the find event target behavior change in particular, we have the following in our code: if (EMSCRIPTEN_VERSION VERSION_GREATER_EQUAL "1.39.5") set(EMSCRIPTEN_HAS_NEW_DOM_ELEMENT_LOOKUP_BEHAVIOUR ON) else() set(EMSCRIPTEN_HAS_NEW_DOM_ELEMENT_LOOKUP_BEHAVIOUR OFF) endif() Which is later exposed to the C++ preprocessor using configure_file and a #cmakedefine01. András On Fri, Apr 10, 2020 at 12:39 PM Benjamin Golinvaux <[email protected]> wrote: > Hello, > > I am writing a library using Emscripten and I stumbled on issues related > to users using different values for > DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR when building our lib. > > I was about to add a note that mentions the mandatory usage of -s > DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR=1 but I thought it would be > more elegant to have the library adapt itself (the client of the library > have to build it on their own) > > I was wondering if I could somehow introspect the settings at compile time > (with a #define macro) to find out the value of this flag or, if no macro > is provided, at runtime (worse, but sufficient for my needs) > > I think I could use an awful hack where I examine the dom and try to > register a dummy event callback and check its value, but I would like to > avoid that if possible. > > Thanks in advance for any information on this topic. > > > Benjamin > > -- > 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/0f9d5629-8597-4a76-a1e2-d03db349de16%40googlegroups.com > <https://groups.google.com/d/msgid/emscripten-discuss/0f9d5629-8597-4a76-a1e2-d03db349de16%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/CANPdQvK_XEopA0eqrWNT%3Dvn3jgrVC%3D9UCLZb4w-biX2p%3DNGxOw%40mail.gmail.com.
