On 2/2/26 8:55 AM, Mark Cave-Ayland wrote:
On 02/02/2026 15:42, Cornelia Huck wrote:
On Mon, Feb 02 2026, Peter Maydell <[email protected]> wrote:
On Mon, 2 Feb 2026 at 04:04, Richard Henderson
<[email protected]> wrote:
On 1/30/26 04:41, Pierrick Bouvier wrote:
On 1/29/26 9:37 AM, Pierrick Bouvier wrote:
contrib/plugins: add empty cpp plugin
Hi; this fails to build for me on Linux (Ubuntu 24.04) with clang:
In file included from ../../contrib/plugins/cpp.cpp:33:
/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/coroutine:38:3:
error: "the <coroutine> header requires -fcoroutines"
38 | # error "the <coroutine> header requires -fcoroutines"
| ^
1 error generated.
Fails for me as well on Fedora 42 (x86_64) with gcc:
In file included from ../qemu/contrib/plugins/cpp.cpp:33:
/usr/include/c++/15/coroutine:43:3: error: #error "the <coroutine> header requires
-fcoroutines"
43 | # error "the <coroutine> header requires -fcoroutines"
| ^~~~~
(It works for me on an aarch64 RHEL 9 system.)
Is this with a clean build? I had exactly the same error message
earlier, but I was able to fix it by destroying my build/ directory,
then re-running configure followed again by make.
ATB,
Mark.
Thanks for the reports everyone.
I tried it on ubuntu LTS and didn't encounter this problem.
What is happening is that meson unfortunately caches default_options
set, including the C++ standard version in our case.
Thus, you indeed need to clean and rebuild once.
The solution for this would be to not use default_options and add the
flag to qemu_cflags instead. It's the same limitation if we change the
default warning level, or any other option set with default_options.
Let me know if cleaning solved the problem for you Cornelia and Peter,
and sorry for the noise it created.
Regards,
Pierrick
