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I get the error:

wasm-ld: error: lto.tmp: undefined symbol: main

Because I try to compile a C or C++ file with Clang compiler to wasm32-wasi. I have defined:

-Wl,--no-entry

But it still insists of there being main() function present. The only way I can stop that is by doing:

-nostdlib

Which works, but then I can't include any library headers or use anything. I was wondering why I can't disable the main entry point without disabling support for the standard library? This goes both for C and C++. My full command is:

zig c++ ./WebAssemblyCompilationTesting.cpp -o myoutput.wasm --target=wasm32-wasi -Wl,--no-entry -g0 -Wl,--strip-all -O3 -nostdlib
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  • zig isn't Clang - and C++ isn't zig - so please explain your command-line for us. Commented Aug 24 at 0:49
  • Also, as far as Google will take me, I'm only seeing --target=wasm32-wasi as an option for Rust - not for Zig or Clang. I honestly don't know what's going on here. Commented Aug 24 at 0:52
  • @Dai I'm pretty sure they're the same. zig c++ is using clang++. And I got it to work with -g0 -Wl,--strip-all. Actually I'm not sure the -g0 is necessary, -Wl,--stripall did it. Made it go from 700kb to 300 bytes. Commented Aug 24 at 3:03
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