Emulation of older Desktop OpenGL API features

**Version of emscripten/emsdk:**
`3.1.37`
**Version of qt:**
`6.6`

**Failing command line in full:**
```
10:47:03: 正在启动 "C:\Qt\Tools\mingw1120_64\bin\mingw32-make.exe" -j8

C:\Qt\6.6.1\mingw_64\bin\qmake6.exe -install sed -e s/@APPNAME@/Cpp-QtWidgetsApplication-Test/g -e s/@PRELOAD@//g C:/Qt/6.6.1/wasm_singlethread/plugins/platforms/wasm_shell.html > C:/Users/14240/桌面/ZYF.Code/build-Cpp-QtWidgetsApplication-Test-WebAssembly_Qt_6_6_1_single_threaded-Debug/Cpp-QtWidgetsApplication-Test.html
copy /y C:\Qt\6.6.1\wasm_singlethread\plugins\platforms\qtloader.js C:\Users\14240\桌面\ZYF.Code\build-Cpp-QtWidgetsApplication-Test-WebAssembly_Qt_6_6_1_single_threaded-Debug
copy /y C:\Qt\6.6.1\wasm_singlethread\plugins\platforms\qtlogo.svg C:\Users\14240\桌面\ZYF.Code\build-Cpp-QtWidgetsApplication-Test-WebAssembly_Qt_6_6_1_single_threaded-Debug
1 file(s) copied.
1 file(s) copied.
em++ -s 'ASYNCIFY_IMPORTS=qt_asyncify_suspend_js,qt_asyncify_resume_js' -s WASM=1 -s MAX_WEBGL_VERSION=2 -s ERROR_ON_UNDEFINED_SYMBOLS=1 --bind -s FETCH=1 -s MODULARIZE=1 -s EXPORT_NAME=createQtAppInstance -s WASM_BIGINT=1 -s STACK_SIZE=5MB -s LEGACY_GL_EMULATION=1 -g2 -s WASM=1 -s MAX_WEBGL_VERSION=2 -s ERROR_ON_UNDEFINED_SYMBOLS=1 --bind -s FETCH=1 -s MODULARIZE=1 -s EXPORT_NAME=createQtAppInstance -s WASM_BIGINT=1 -s STACK_SIZE=5MB -s DEMANGLE_SUPPORT=1 --profiling-funcs -s EXPORTED_RUNTIME_METHODS=UTF16ToString,stringToUTF16,JSEvents,specialHTMLTargets,FS -sALLOW_MEMORY_GROWTH -s INITIAL_MEMORY=50MB C:/Qt/6.6.1/wasm_singlethread/lib/libQt6BundledFreetype.a C:/Qt/6.6.1/wasm_singlethread/lib/libQt6BundledLibpng.a -o .\Cpp-QtWidgetsApplication-Test.js @object_script.Cpp-QtWidgetsApplication-Test.js
wasm-ld: error: main.obj: undefined symbol: glVertex3d
wasm-ld: error: main.obj: undefined symbol: glVertex3d
wasm-ld: error: main.obj: undefined symbol: glVertex3d
wasm-ld: error: main.obj: undefined symbol: glVertex3d
wasm-ld: error: main.obj: undefined symbol: glVertex3d
wasm-ld: error: main.obj: undefined symbol: glVertex3d
em++: error: 'C:/emsdk-main/upstream/bin\wasm-ld.exe -o .\Cpp-QtWidgetsApplication-Test.wasm C:/Qt/6.6.1/wasm_singlethread/lib/libQt6BundledFreetype.a C:/Qt/6.6.1/wasm_singlethread/lib/libQt6BundledLibpng.a main.obj cpp-qtwidgetsapplication-test.js_plugin_import.obj C:/Qt/6.6.1/wasm_singlethread/lib/objects-Release/QWasmIntegrationPlugin_resources_1/.rcc/qrc_wasmfonts.cpp.o C:/Qt/6.6.1/wasm_singlethread/lib/objects-Release/QWasmIntegrationPlugin_resources_2/.rcc/qrc_wasmwindow.cpp.o C:/Qt/6.6.1/wasm_singlethread/lib/objects-Release/Gui_resources_1/.rcc/qrc_qpdf.cpp.o C:/Qt/6.6.1/wasm_singlethread/lib/objects-Release/Gui_resources_2/.rcc/qrc_gui_shaders.cpp.o C:/Qt/6.6.1/wasm_singlethread/plugins/platforms/libqwasm.a C:/Qt/6.6.1/wasm_singlethread/plugins/iconengines/libqsvgicon.a C:/Qt/6.6.1/wasm_singlethread/plugins/imageformats/libqgif.a C:/Qt/6.6.1/wasm_singlethread/plugins/imageformats/libqicns.a C:/Qt/6.6.1/wasm_singlethread/plugins/imageformats/libqico.a C:/Qt/6.6.1/wasm_singlethread/plugins/imageformats/libqjpeg.a C:/Qt/6.6.1/wasm_singlethread/lib/libQt6BundledLibjpeg.a C:/Qt/6.6.1/wasm_singlethread/plugins/imageformats/libqsvg.a C:/Qt/6.6.1/wasm_singlethread/lib/libQt6Svg.a C:/Qt/6.6.1/wasm_singlethread/plugins/imageformats/libqtga.a C:/Qt/6.6.1/wasm_singlethread/plugins/imageformats/libqtiff.a C:/Qt/6.6.1/wasm_singlethread/plugins/imageformats/libqwbmp.a C:/Qt/6.6.1/wasm_singlethread/plugins/imageformats/libqwebp.a C:/Qt/6.6.1/wasm_singlethread/lib/objects-Release/Widgets_resources_1/.rcc/qrc_qstyle.cpp.o C:/Qt/6.6.1/wasm_singlethread/lib/objects-Release/Widgets_resources_2/.rcc/qrc_qstyle1.cpp.o C:/Qt/6.6.1/wasm_singlethread/lib/objects-Release/Widgets_resources_3/.rcc/qrc_qmessagebox.cpp.o C:/Qt/6.6.1/wasm_singlethread/lib/libQt6OpenGLWidgets.a C:/Qt/6.6.1/wasm_singlethread/lib/libQt6Widgets.a C:/Qt/6.6.1/wasm_singlethread/lib/libQt6OpenGL.a C:/Qt/6.6.1/wasm_singlethread/lib/libQt6Gui.a C:/Qt/6.6.1/wasm_singlethread/lib/libQt6BundledHarfbuzz.a C:/Qt/6.6.1/wasm_singlethread/lib/libQt6BundledFreetype.a C:/Qt/6.6.1/wasm_singlethread/lib/libQt6BundledLibpng.a C:/Qt/6.6.1/wasm_singlethread/lib/libQt6Core.a C:/Qt/6.6.1/wasm_singlethread/lib/libQt6BundledZLIB.a C:/Qt/6.6.1/wasm_singlethread/lib/libQt6BundledPcre2.a -LC:\emsdk-main\upstream\emscripten\cache\sysroot\lib\wasm32-emscripten --whole-archive -lfetch -lembind-rtti --no-whole-archive -lGL-emu-webgl2 -lal -lhtml5 -lstubs-debug -lnoexit -lc-debug -ldlmalloc -lcompiler_rt -lc++-noexcept -lc++abi-debug-noexcept -lsockets -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr C:\Users\14240\AppData\Local\Temp\tmpp490mddhlibemscripten_js_symbols.so --export-if-defined=main --export-if-defined=__start_em_asm --export-if-defined=__stop_em_asm --export-if-defined=__start_em_lib_deps --export-if-defined=__stop_em_lib_deps --export-if-defined=__start_em_js --export-if-defined=__stop_em_js --export-if-defined=__main_argc_argv --export-if-defined=fflush --export=emscripten_stack_get_end --export=emscripten_stack_get_free --export=emscripten_stack_get_base --export=emscripten_stack_get_current --export=emscripten_stack_init --export=__cxa_demangle --export=stackSave --export=stackRestore --export=stackAlloc --export=__errno_location --export=malloc --export=free --export=__wasm_call_ctors --export-table -z stack-size=5242880 --initial-memory=52428800 --no-entry --max-memory=2147483648 --stack-first' failed (returned 1)
mingw32-make: *** [Makefile:69: .\Cpp-QtWidgetsApplication-Test.js] Error 1
10:47:05: 进程"C:\Qt\Tools\mingw1120_64\bin\mingw32-make.exe"退出，退出代码 2 。
Error while building/deploying project Cpp-QtWidgetsApplication-Test (kit: WebAssembly Qt 6.6.1 (single-threaded))
When executing step "Make"
```

There is a teaching program written with qt opengl low version before, want to transplant to the web, but the oepngl library, Mingw environment with the system opengl library can be used, Emscripten environment I should use which.