Re: [oe] [PATCH] assimp: use CXXFLAGS to suppress GCC 16 unused-but-set-variable error

On Tue, Aug 11, 2026 at 2:13 AM Ashwin Prabhakar via lists.openembedded.org
<[email protected]> wrote:

> The CMake option -DASSIMP_WARNINGS_AS_ERRORS=OFF is not reliably honored
> by the upstream build system, so the build still fails with GCC 16.
> Instead, pass -Wno-error=unused-but-set-variable via CXXFLAGS to
> directly override the compiler behavior regardless of how upstream
> manages -Werror.
>

It seems you have root caused it to a certain extent, I would encourage to
report it upstream as well. We don't want to disable more than what
upstream allows us to


>
> Signed-off-by: Ashwin Prabhakar <[email protected]>
> ---
>  meta-oe/recipes-graphics/assimp/assimp_git.bb | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/meta-oe/recipes-graphics/assimp/assimp_git.bb
> b/meta-oe/recipes-graphics/assimp/assimp_git.bb
> index 4cf2d1f787..32c5cdebb1 100644
> --- a/meta-oe/recipes-graphics/assimp/assimp_git.bb
> +++ b/meta-oe/recipes-graphics/assimp/assimp_git.bb
> @@ -17,10 +17,11 @@ PV = "5.x+git${SRCPV}"
>
>  inherit cmake
>
> +CXXFLAGS += "-Wno-error=unused-but-set-variable"
> +
>  EXTRA_OECMAKE = "\
>      -DASSIMP_BUILD_ASSIMP_TOOLS=OFF \
>      -DASSIMP_BUILD_TESTS=OFF \
> -    -DASSIMP_WARNINGS_AS_ERRORS=OFF \
>      -DASSIMP_LIB_INSTALL_DIR=${baselib} \
>      -DCMAKE_INSTALL_PREFIX=${prefix} \
>      -DCMAKE_INSTALL_LIBDIR=${baselib} \
> --
> 2.43.0
>
>
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