[wasm] configure failed when building qt-5.14 wasm with emscripten 1.39.0

    I build qt 5.14 wasm from git with emscripten 1.39.0 with the follow command:

./configure -opensource -confirm-license -xplatform wasm-emscripten -feature-thread -nomake examples -nomake tests -skip qt3d -skip qtdeclarative -skip qtmultimedia -skip qttools -skip qtxmlpatterns -prefix /usr/local/qt5-wasm

    I can successfully built qt-wasm from the latest 5.14 branch about one month ago, but today I pull the latest code from 5.14 branch and configure failed:

Running configuration tests...
Checking for valid makespec... Note: Also available for Linux: linux-clang linux-icc

ERROR: Cannot compile a minimal program. The toolchain or QMakeSpec is broken.

Check config.log for details.

The content of config.log is as follows:

Command line: -opensource -confirm-license -xplatform wasm-emscripten -feature-thread -nomake examples -nomake tests -skip qt3d -skip qtdeclarative -skip qtmultimedia -skip qttools -skip qtxmlpatterns -prefix /usr/local/qt5-wasm
executing config test verifyspec
+ cd /home/jl/sdk/qt/qt5/config.tests/verifyspec && /home/jl/sdk/qt/qt5/qtbase/bin/qmake "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += static warn_off console single_arch" -early "CONFIG += cross_compile" /home/jl/sdk/qt/qt5/qtbase/config.tests/verifyspec
> Project WARNING: You should use the recommended Emscripten version 1.38.27 with this Qt. You have 1.39.0 closure
> Project WARNING: This Qt was built with Emscripten version . You have 1.39.0 closure. The difference may cause issues.
+ cd /home/jl/sdk/qt/qt5/config.tests/verifyspec && MAKEFLAGS= /usr/bin/make
> em++ -c -pipe -O3 -std=gnu++11 -w -I/home/jl/sdk/qt/qt5/qtbase/config.tests/verifyspec -I. -I/home/jl/.emscripten_ports/openssl/include -I/home/jl/sdk/qt/qt5/qtbase/mkspecs/wasm-emscripten -o verifyspec.o /home/jl/sdk/qt/qt5/qtbase/config.tests/verifyspec/verifyspec.cpp
> sed -e s/@APPNAME@/verifyspec/g /usr/local/qt5-wasm/plugins/platforms/wasm_shell.html > /home/jl/sdk/qt/qt5/config.tests/verifyspec/verifyspec.html
> cp -f /usr/local/qt5-wasm/plugins/platforms/qtloader.js /home/jl/sdk/qt/qt5/config.tests/verifyspec
> cp -f /usr/local/qt5-wasm/plugins/platforms/qtlogo.svg /home/jl/sdk/qt/qt5/config.tests/verifyspec
> em++ -s "BINARYEN_TRAP_MODE='clamp'" -s WASM=1 -s FULL_ES2=1 -s USE_WEBGL2=1 -s NO_EXIT_RUNTIME=0 -s ERROR_ON_UNDEFINED_SYMBOLS=1 --bind -O3 -o ./verifyspec.js verifyspec.o
> shared:ERROR: BINARYEN_TRAP_MODE is not supported by the LLVM wasm backend
> Makefile:68: recipe for target 'verifyspec.js' failed
> make: *** [verifyspec.js] Error 1

     How can I build qt-5.14 wasm with emscripten 1.39.0?