i can`t use x86_64-w64-mingw32-g++ build the project in the linux

[li-yun-xian]

main.cpp: In function ‘int main(int, char**)’:
main.cpp:5:10: error: ‘mutex’ is not a member of ‘std’
5 | std::mutex s;
| ^~~~~
main.cpp:2:1: note: ‘std::mutex’ is defined in header ‘’; did you forget to ‘#include ’?
1 | #include
+++ |+#include

[ArthurSonzogni]

Hello,
Could you please provide the steps to reproduce?

[li-yun-xian]

i create a toolchain.cmake file for cmake to build it

toolchaim.cmake 👇
`
set(CMAKE_SYSTEM_NAME Windows)
set(CMAKE_SYSTEM_PROCESSOR x86_64)

set(TOOLCHAIN_PREFIX x86_64-w64-mingw32)

set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}-gcc)
set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}-g++)

`

Then enter the following two commands
cmake -S .. -B build -DCMAKE_TOOLCHAIN_FILE=./toolchain.cmake
cmake --build build --target all

if i include mutex in other program and use mingw compile it ,will occur the same error,linux mingw maybe not support mutex

[cole-io]

Are you compiling with --std=c++23?