Sorry, I wrote all this thinking that pixman was mandatory. We could
already move the code to detect pixman to meson.build (see
docs/devel/build-system.rst), but unless I see a patch for that in 1-2 days
I will queue this one.

Paolo

Il mar 25 ago 2020, 18:26 Thomas Huth <thuth@redhat.com> ha scritto:

> When pixman is not installed (or too old), but virglrenderer is available
> and "configure" has been run with "--disable-system", the build currently
> aborts when trying to compile vhost-user-gpu (since it requires pixman).
> Let's add a proper CONFIG_PIXMAN switch so we can skip the build of
> vhost-user-gpu when pixman is not installed or too old.
>
> Fixes: 9b52b17ba5 ("configure: Allow to build tools without pixman")
> Reported-by: Rafael Kitover <rkitover@gmail.com>
> Reported-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  configure                          | 20 +++++++++++++-------
>  contrib/vhost-user-gpu/meson.build |  3 ++-
>  meson.build                        | 12 +++++++-----
>  3 files changed, 22 insertions(+), 13 deletions(-)
>
> diff --git a/configure b/configure
> index b1e11397a8..bddda91477 100755
> --- a/configure
> +++ b/configure
> @@ -3925,15 +3925,18 @@ fi
>  ##########################################
>  # pixman support probe
>
> -if test "$softmmu" = "no"; then
> -  pixman_cflags=
> -  pixman_libs=
> -elif $pkg_config --atleast-version=0.21.8 pixman-1 > /dev/null 2>&1; then
> +if $pkg_config --atleast-version=0.21.8 pixman-1 > /dev/null 2>&1; then
> +  pixman="yes"
>    pixman_cflags=$($pkg_config --cflags pixman-1)
>    pixman_libs=$($pkg_config --libs pixman-1)
>  else
> +  pixman="no"
> +  pixman_cflags=
> +  pixman_libs=
> +fi
> +if test "$softmmu" = "yes" && test "$pixman" = "no"; then
>    error_exit "pixman >= 0.21.8 not present." \
> -      "Please install the pixman devel package."
> +      "Please install the pixman devel package or use --disable-system."
>  fi
>
>  ##########################################
> @@ -8054,8 +8057,11 @@ fi
>
>  done # for target in $targets
>
> -echo "PIXMAN_CFLAGS=$pixman_cflags" >> $config_host_mak
> -echo "PIXMAN_LIBS=$pixman_libs" >> $config_host_mak
> +if test "$pixman" = "yes"; then
> +  echo "CONFIG_PIXMAN=y" >> $config_host_mak
> +  echo "PIXMAN_CFLAGS=$pixman_cflags" >> $config_host_mak
> +  echo "PIXMAN_LIBS=$pixman_libs" >> $config_host_mak
> +fi
>
>  if [ "$fdt" = "git" ]; then
>    subdirs="$subdirs dtc"
> diff --git a/contrib/vhost-user-gpu/meson.build
> b/contrib/vhost-user-gpu/meson.build
> index 6c1459f54a..142daebfd7 100644
> --- a/contrib/vhost-user-gpu/meson.build
> +++ b/contrib/vhost-user-gpu/meson.build
> @@ -1,5 +1,6 @@
>  if 'CONFIG_TOOLS' in config_host and 'CONFIG_VIRGL' in config_host \
> -    and 'CONFIG_GBM' in config_host and 'CONFIG_LINUX' in config_host
> +    and 'CONFIG_GBM' in config_host and 'CONFIG_LINUX' in config_host \
> +    and 'CONFIG_PIXMAN' in config_host
>    executable('vhost-user-gpu', files('vhost-user-gpu.c', 'virgl.c',
> 'vugbm.c'),
>               link_with: libvhost_user,
>               dependencies: [qemuutil, pixman, gbm, virgl],
> diff --git a/meson.build b/meson.build
> index 7fbb7ab2fb..9eecea549c 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -113,8 +113,11 @@ if 'CONFIG_GNUTLS' in config_host
>    gnutls = declare_dependency(compile_args:
> config_host['GNUTLS_CFLAGS'].split(),
>                                link_args:
> config_host['GNUTLS_LIBS'].split())
>  endif
> -pixman = declare_dependency(compile_args:
> config_host['PIXMAN_CFLAGS'].split(),
> -                            link_args: config_host['PIXMAN_LIBS'].split())
> +pixman = not_found
> +if 'CONFIG_PIXMAN' in config_host
> +  pixman = declare_dependency(compile_args:
> config_host['PIXMAN_CFLAGS'].split(),
> +                              link_args:
> config_host['PIXMAN_LIBS'].split())
> +endif
>  pam = not_found
>  if 'CONFIG_AUTH_PAM' in config_host
>    pam = cc.find_library('pam')
> @@ -1095,9 +1098,7 @@ if have_tools
>    if 'CONFIG_VHOST_USER' in config_host
>      subdir('contrib/libvhost-user')
>      subdir('contrib/vhost-user-blk')
> -    if 'CONFIG_LINUX' in config_host
> -      subdir('contrib/vhost-user-gpu')
> -    endif
> +    subdir('contrib/vhost-user-gpu')
>      subdir('contrib/vhost-user-input')
>      subdir('contrib/vhost-user-scsi')
>    endif
> @@ -1278,6 +1279,7 @@ summary_info += {'SDL image support':
> sdl_image.found()}
>  # TODO: add back version
>  summary_info += {'GTK support':       config_host.has_key('CONFIG_GTK')}
>  summary_info += {'GTK GL support':
> config_host.has_key('CONFIG_GTK_GL')}
> +summary_info += {'pixman support':
> config_host.has_key('CONFIG_PIXMAN')}
>  # TODO: add back version
>  summary_info += {'VTE support':       config_host.has_key('CONFIG_VTE')}
>  summary_info += {'TLS priority':      config_host['CONFIG_TLS_PRIORITY']}
> --
> 2.18.2
>
>