Re: [PATCH] libvhost-user: add a link-static option

[Paolo Bonzini <pbonzini@redhat.com>]

On 12/12/20 10:08, marcandre.lureau@redhat.com wrote:
> From: Marc-André Lureau <marcandre.lureau@redhat.com>
> 
> Fix linking vhost-user binaries with with ./configure -static.
> 
> Fixes: 0df750e9d3a5fea5e1 ("libvhost-user: make it a meson subproject")
> Reported-by: Peter Maydell <peter.maydell@linaro.org>
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> ---
>   configure                                   | 1 +
>   subprojects/libvhost-user/meson.build       | 3 ++-
>   subprojects/libvhost-user/meson_options.txt | 5 +++++
>   3 files changed, 8 insertions(+), 1 deletion(-)
>   create mode 100644 subprojects/libvhost-user/meson_options.txt
> 
> diff --git a/configure b/configure
> index 18c26e0389..465f7bb150 100755
> --- a/configure
> +++ b/configure
> @@ -7014,6 +7014,7 @@ NINJA=$ninja $meson setup \
>           -Diconv=$iconv -Dcurses=$curses -Dlibudev=$libudev\
>           -Ddocs=$docs -Dsphinx_build=$sphinx_build -Dinstall_blobs=$blobs \
>           -Dvhost_user_blk_server=$vhost_user_blk_server \
> +        -Dlibvhost-user:link-static=$(if test "$static" = yes; then echo true; else echo false; fi) \
>           $cross_arg \
>           "$PWD" "$source_path"
>   
> diff --git a/subprojects/libvhost-user/meson.build b/subprojects/libvhost-user/meson.build
> index c5d85c11d7..5a9cc8675e 100644
> --- a/subprojects/libvhost-user/meson.build
> +++ b/subprojects/libvhost-user/meson.build
> @@ -2,7 +2,8 @@ project('libvhost-user', 'c',
>           license: 'GPL-2.0-or-later',
>           default_options: ['c_std=gnu99'])
>   
> -glib = dependency('glib-2.0')
> +link_static = get_option('link-static')
> +glib = dependency('glib-2.0', static: link_static)
>   inc = include_directories('../../include', '../../linux-headers')
>   
>   vhost_user = static_library('vhost-user',
> diff --git a/subprojects/libvhost-user/meson_options.txt b/subprojects/libvhost-user/meson_options.txt
> new file mode 100644
> index 0000000000..03fe088e36
> --- /dev/null
> +++ b/subprojects/libvhost-user/meson_options.txt
> @@ -0,0 +1,5 @@
> +option('link-static',
> +  type: 'boolean',
> +  value: false,
> +)
> +

No, this is wrong.  We need to use the results of the configure test 
uniformly until we can move it to meson.build.

Ask yourself if you'd like to have this option in a standalone project, 
the answer most likely is no...  Can you use override_dependency from 
the toplevel meson.build instead?  It's usually meant for 
sub->superproject, but we can use it in this case as well I think.

Paolo