Missing dso_handle

[Mintyboi]

@kripken I hit into this error when running my build.

external function '___dso_handle' is missing. perhaps a side module was not linked in? if this symbol was expected to arrive from a system library, try to build the MAIN_MODULE with EMCC_FORCE_STDLIBS=1 in the environment

This is because after setting EXPORT_ALL to false in #7371 , this function gets excluded in

emscripten/src/jsifier.js

Line 372 in 5247935

if ((EXPORT_ALL || (finalName in EXPORTED_FUNCTIONS)) && !noExport) {

I'm not sure how to reproduce this issue in a smaller test case. However, this function appears to be a standard library function that I am not explicit using.
Do you think it make sense to add it into the shared.Settings.EXPORTED_FUNCTIONS in emcc.py? And if so under which conditions do you think it falls best under

[kripken]

I think we need to understand that better first. What uses it in your codebase? If you can't share the code, can investigate that in llvm IR using llvm-dis.

[pmp-p]

Hi, i get the same when using some various combinations and linking with -ldl for dlopen/ffi goals

only -s EXPORT_ALL=1 -ldl looks valid
https://gist.github.com/pmp-p/68b823a6149d2d6f707cda0a35b0a0dd#file-build-sh

test conditions :
PATH += /opt/sdk/emsdk/clang/e1.38.25_64bit
PATH += /opt/sdk/emsdk/node/8.9.1_64bit/bin
PATH += /opt/sdk/emsdk/emscripten/1.38.25

[Mintyboi]

Sorry for the late update.
I managed to reproduce this issue in a small testapp (using a fastcomp build, 1.39.6-fastcomp) by using a thread_local static variable and setting the profiling flag in my build.

However, because I'm not seeing this in LLVM backend (1.39.6), I'll be closing this thread.

Thanks to all who tried helping!