[boost-*] Boost linking failure for WASM

[amakhno]

Operating system

WASM

Compiler

emscripten 3.1.8

Steps to reproduce the behavior

Clone https://github.com/amakhno/boost-iostream-wasm

Install `emscripten 3.1.8` with `emsdk`, but I think it's the same for all versions

Run commands listed in `build.ps1`

Failure logs

em++: error: /Users/artemmahno/Projects/boost-iostream-wasm/vcpkg/installed/wasm32-emscripten/lib/libboost_regex.a: Unknown format, not a static library!
make[2]: *** [webgl_test.js] Error 1
make[1]: *** [CMakeFiles/webgl_test.dir/all] Error 2
make: *** [all] Error 2

Additional context

The problem happens with all libboost_*.a files. file output for boost dependencies

./vcpkg/installed/wasm32-emscripten/lib/libboost_iostreams.a: WebAssembly (wasm) binary module version 0x1 (MVP)
./vcpkg/installed/wasm32-emscripten/lib/libboost_regex.a: WebAssembly (wasm) binary module version 0x1 (MVP)

Other, non-boost, installed libraries are

libz.a: current ar archive

The install log file is attached

install-wasm32-emscripten-dbg-out.log

There are similar issues

• Boost libs built with emscripten is in unknown format emscripten-core/emscripten#17052 with a different libraries type
• [boost-thread] build failure #35316 with potentially different triplet to be used for boost build configuration

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