OpenSSL build segfaults when building for Emscripten on Windows

[Kurtaga]

I'm trying to build cesium-native for the web with Emscripten on Windows. I'm new to Emscripten and build stack, so I don't want to guess at the root cause. I'm posting the exact environment, steps, and failure.

Environment:

• Windows 11,
• emsdk 4.0.13,

Steps:

git clone --recurse-submodules https://github.com/CesiumGS/cesium-native.git
cd cesium-native
emcmake cmake -B build-web -S . -DCMAKE_BUILD_TYPE=Release

Tested with both Release and Debug, same result.

Log output:

-- EZVCPKG Building/Verifying package openssl using triplet wasm32-emscripten-cesium
CMake Error at cmake/ezvcpkg/ezvcpkg.cmake:83 (message):
  EZVCPKG failed with error 1
Call Stack (most recent call first):
  cmake/ezvcpkg/ezvcpkg.cmake:194 (EZVCPKG_CHECK_RESULTS)
  cmake/ezvcpkg/ezvcpkg.cmake:286 (EZVCPKG_BUILD)
  cmake/ezvcpkg/ezvcpkg.cmake:300 (EZVCPKG_FETCH_IMPL)
  CMakeLists.txt:174 (ezvcpkg_fetch)

...

CMake Error at scripts/cmake/vcpkg_execute_required_process.cmake:127 (message):
    Command failed: D:/.ezvcpkg/afc0a2e01ae104a2474216a2df0e8d78516fd5af/downloads/tools/msys2/7c55719f9ca5acf6/usr/bin/bash.exe --noprofile --norc --debug -c "V=1 ./../src/nssl-3.6.0-a2eab2a5bb.clean/vcpkg/configure  \"D:/.ezvcpkg/afc0a2e01ae104a2474216a2df0e8d78516fd5af/downloads/tools/msys2/f08f440edf60c8a9/usr/bin/perl.exe\" \"D:/.ezvcpkg/afc0a2e01ae104a2474216a2df0e8d78516fd5af/buildtrees/openssl/src/nssl-3.6.0-a2eab2a5bb.clean/Configure\" \"linux-x32\" \"enable-static-engine\" \"enable-capieng\" \"no-tests\" \"no-docs\" \"no-shared\" \"no-module\" \"no-apps\" \"no-engine\" \"no-asm\" \"no-sse2\" \"no-srtp\" \"--cross-compile-prefix=\" \"--openssldir=/etc/ssl\" \"--libdir=lib\" \"--disable-silent-rules\" \"--verbose\" \"--disable-shared\" \"--enable-static\" \"--debug\" \"--prefix=/D/.ezvcpkg/afc0a2e01ae104a2474216a2df0e8d78516fd5af/installed/wasm32-emscripten-cesium/debug\""
    Working Directory: D:/.ezvcpkg/afc0a2e01ae104a2474216a2df0e8d78516fd5af/buildtrees/openssl/wasm32-emscripten-cesium-dbg
    Error code: 139
    See logs for more information:
      D:\.ezvcpkg\afc0a2e01ae104a2474216a2df0e8d78516fd5af\buildtrees\openssl\config-wasm32-emscripten-cesium-dbg-out.log
      D:\.ezvcpkg\afc0a2e01ae104a2474216a2df0e8d78516fd5af\buildtrees\openssl\config-wasm32-emscripten-cesium-dbg-err.log

...

*** Content of log file: D:\.ezvcpkg\afc0a2e01ae104a2474216a2df0e8d78516fd5af\buildtrees\openssl\config-wasm32-emscripten-cesium-dbg-out.log:
Configuring OpenSSL version 3.6.0 for target linux-x32
Using os-specific seed configuration

*** Content of log file: D:\.ezvcpkg\afc0a2e01ae104a2474216a2df0e8d78516fd5af\buildtrees\openssl\config-wasm32-emscripten-cesium-dbg-err.log:
+ D:/.ezvcpkg/afc0a2e01ae104a2474216a2df0e8d78516fd5af/downloads/tools/msys2/f08f440edf60c8a9/usr/bin/perl.exe D:/.ezvcpkg/afc0a2e01ae104a2474216a2df0e8d78516fd5af/buildtrees/openssl/src/nssl-3.6.0-a2eab2a5bb.clean/Configure linux-x32 enable-static-engine enable-capieng no-tests no-docs no-shared no-module no-apps no-engine no-asm no-sse2 no-srtp --cross-compile-prefix= --openssldir=/etc/ssl --libdir=lib --debug --prefix=/D/.ezvcpkg/afc0a2e01ae104a2474216a2df0e8d78516fd5af/installed/wasm32-emscripten-cesium/debug
./../src/nssl-3.6.0-a2eab2a5bb.clean/vcpkg/configure: line 31:   449 Segmentation fault      "${INTERPRETER}" ${OUT_OPTIONS[@]}

CMake Error at cmake/ezvcpkg/ezvcpkg.cmake:102 (message):
Call Stack (most recent call first):
  cmake/ezvcpkg/ezvcpkg.cmake:194 (EZVCPKG_CHECK_RESULTS)
  cmake/ezvcpkg/ezvcpkg.cmake:286 (EZVCPKG_BUILD)
  cmake/ezvcpkg/ezvcpkg.cmake:300 (EZVCPKG_FETCH_IMPL)
  CMakeLists.txt:174 (ezvcpkg_fetch)


-- Configuring incomplete, errors occurred!
emcmake: error: 'cmake -B build-web -S . -DCMAKE_BUILD_TYPE=Release '-DCMAKE_TOOLCHAIN_FILE=D:\Tools\emsdk\upstream\emscripten\cmake\Modules\Platform\Emscripten.cmake' -DCMAKE_CROSSCOMPILING_EMULATOR=D:/Tools/emsdk/node/22.16.0_64bit/bin/node.exe -G Ninja' failed (returned 1)

I'd appreciate some guidance.