Internal compiler errors with em++ under clang64 environment

[vittorioromeo]

Description / Steps to reproduce the issue

In clang64 environment with git, ninja, emscripten:

git clone --depth=1 https://github.com/vittorioromeo/VRSFML
cd VRSFML
cmake --preset vrdev_emcc # might need to run multiple times to correctly fetch dependencies
cd build_vrdev_emcc
ninja

Expected behavior

clang++ doesn't crash

Actual behavior

clang++ crashes with internal errors such as:

FAILED: src/SFML/Window/CMakeFiles/sfml-window.dir/Glad.cpp.o
C:\msys64\clang64\lib\emscripten\em++.bat -DDOCTEST_CONFIG_SUPER_FAST_ASSERTS -DSFML_BUILD_AUDIO -DSFML_BUILD_EXAMPLES -DSFML_BUILD_GRAPHICS -DSFML_BUILD_IMGUI -DSFML_BUILD_NETWORK -DSFML_BUILD_TEST_SUITE -DSFML_BUILD_WINDOW -DSFML_ENABLE_LIFETIME_TRACKING -DSFML_ENABLE_STACK_TRACES -DSFML_OPENGL_ES -DSFML_STATIC -D_GLIBCXX_ASSERTIONS=1 -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D_LIBCPP_REMOVE_TRANSITIVE_INCLUDES -IC:/OHWorkspace/SFML/include -IC:/OHWorkspace/SFML/src -isystem C:/OHWorkspace/SFML/extlibs/headers/glad/include -isystem C:/OHWorkspace/SFML/extlibs/headers/vulkan -Wall -Wextra -Wpedantic -Wno-ignored-attributes -Wno-unused-command-line-argument -g -std=c++20 -fansi-escape-codes -fcolor-diagnostics -g3 -gsource-map -O0 -pthread --shell-file=C:/OHWorkspace/SFML/emscripten/shell.html -Wall -Wextra -Wshadow -Wnon-virtual-dtor -Wcast-align -Wunused -Woverloaded-virtual -Wconversion -Wsign-conversion -Wdouble-promotion -Wformat=2 -Wimplicit-fallthrough -Wsuggest-override -Wnull-dereference -Wold-style-cast -Wpedantic -Wno-c++20-extensions -Wno-unknown-warning-option -MD -MT src/SFML/Window/CMakeFiles/sfml-window.dir/Glad.cpp.o -MF src\SFML\Window\CMakeFiles\sfml-window.dir\Glad.cpp.o.d -o src/SFML/Window/CMakeFiles/sfml-window.dir/Glad.cpp.o -c C:/OHWorkspace/SFML/src/SFML/Window/Glad.cpp
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: C:/msys64/clang64/opt/emscripten-llvm/bin/clang++.exe -target wasm32-unknown-emscripten -fignore-exceptions -mno-nontrapping-fptoint -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --sysroot=C:/msys64/clang64/lib/emscripten/cache/sysroot -D__EMSCRIPTEN_SHARED_MEMORY__=1 -DEMSCRIPTEN -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -DDOCTEST_CONFIG_SUPER_FAST_ASSERTS -DSFML_BUILD_AUDIO -DSFML_BUILD_EXAMPLES -DSFML_BUILD_GRAPHICS -DSFML_BUILD_IMGUI -DSFML_BUILD_NETWORK -DSFML_BUILD_TEST_SUITE -DSFML_BUILD_WINDOW -DSFML_ENABLE_LIFETIME_TRACKING -DSFML_ENABLE_STACK_TRACES -DSFML_OPENGL_ES -DSFML_STATIC -D_GLIBCXX_ASSERTIONS=1 -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D_LIBCPP_REMOVE_TRANSITIVE_INCLUDES -IC:/OHWorkspace/SFML/include -IC:/OHWorkspace/SFML/src -isystem C:/OHWorkspace/SFML/extlibs/headers/glad/include -isystem C:/OHWorkspace/SFML/extlibs/headers/vulkan -Wall -Wextra -Wpedantic -Wno-ignored-attributes -Wno-unused-command-line-argument -g3 -std=c++20 -fansi-escape-codes -fcolor-diagnostics -g3 -g -O0 -pthread -Wall -Wextra -Wshadow -Wnon-virtual-dtor -Wcast-align -Wunused -Woverloaded-virtual -Wconversion -Wsign-conversion -Wdouble-promotion -Wformat=2 -Wimplicit-fallthrough -Wsuggest-override -Wnull-dereference -Wold-style-cast -Wpedantic -Wno-c++20-extensions -Wno-unknown-warning-option -MD -MT src/SFML/Window/CMakeFiles/sfml-window.dir/Glad.cpp.o -MF src\\SFML\\Window\\CMakeFiles\\sfml-window.dir\\Glad.cpp.o.d -c C:/OHWorkspace/SFML/src/SFML/Window/Glad.cpp -o src/SFML/Window/CMakeFiles/sfml-window.dir/Glad.cpp.o
1.      C:/OHWorkspace/SFML/extlibs/headers/glad/include/gl
ad/gl.h:4986:119: current parser token ')'
Exception Code: 0x80000003
 #0 0x00007ff6fe3d0a18 clang::ASTContext::DecodeTypeStr(char const*&, clang::ASTContext const&, clang::ASTContext::GetBuiltinTypeError&, bool&, bool) const (C:\msys64\clang64\opt\emscripten-llvm\bin\clang++.exe+0xec0a18)

[...]

See message.txt for a full log.

Verification

• I have verified that my MSYS2 is up-to-date before submitting the report (see https://www.msys2.org/docs/updating/)

Windows Version

MINGW64_NT-10.0-26120

MINGW environments affected

• MINGW64
• MINGW32
• UCRT64
• CLANG64
• CLANGARM64

Are you willing to submit a PR?

No response