Re: [Qemu-devel] [PATCH 2/2] qga-win: fix VSS build breakage due to unintended gnu99 C++ flag

["Daniel P. Berrangé" <berrange@redhat.com>]

On Tue, Feb 12, 2019 at 03:29:17PM -0600, Michael Roth wrote:
> Commit 7be41675f7c set -std=gnu99 for C code via QEMU_CFLAGS. Currently
> we generate a "custom" QEMU_CXXFLAGS for VSS DLL C++ build by
> filtering out some options from QEMU_CFLAGS and adding some others.
> Since we don't filter out -std=gnu99 currently this breaks builds when
> VSS support is enabled.
> 
> We could keep the existing approach, filter out -std=gnu99 from
> QEMU_CFLAGS, and add -std=gnu++98, like configure currently does for
> QEMU_CXXFLAGS, but as it turns out our resulting QEMU_CXXFLAGS would
> be exactly what configure already generates, just with these filtered
> out:
> 
>   -fstack-protector-all -fstack-protector-strong
> 
> and these added:
> 
>   -Wno-unknown-pragmas -Wno-delete-non-virtual-dtor
> 
> So fix the issue by re-using configure-generated QEMU_CXXFLAGS and
> just handling these specific changes.
> 
> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
> ---
>  qga/vss-win32/Makefile.objs | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>


Regards,
Daniel
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