Use CMake detection for Emscripten due to a bug in vcpkg.

When installing for wasm32 with vcpkg, CMake's try_run does not end up running
with the correct compiler. This issue has been mention in a few existing vcpkg
portfiles.

Alternatively, we could check the VCPKG_TARGET_ARCHITECTURE variable for wasm32
but instead we check for EMSCRIPTEN CMake variable.

diff --git a/cmake/detect-arch.cmake b/cmake/detect-arch.cmake
index 6f29c4a1023e088418888dc018eeffbbbd48a3c7..21c237d61a3af01290370af7d56adccae9dd7d18 100644 (file)
--- a/cmake/detect-arch.cmake
+++ b/cmake/detect-arch.cmake
@@ -16,6 +16,8 @@ elseif(MSVC)
     elseif ("${MSVC_C_ARCHITECTURE_ID}" STREQUAL "ARM64")
         set(ARCH "aarch64")
     endif()
+elseif(EMSCRIPTEN)
+    set(ARCH "wasm32")
 elseif(CMAKE_CROSSCOMPILING)
     set(ARCH ${CMAKE_C_COMPILER_TARGET})
 else()