On Thu, Dec 17, 2020 at 1:40 PM Paolo Bonzini <pbonzini@redhat.com> wrote:

> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

---
>  chardev/meson.build |  2 +-
>  configure           | 32 ++++----------------------------
>  meson.build         | 20 +++++++++++++++++---
>  meson_options.txt   |  2 ++
>  4 files changed, 24 insertions(+), 32 deletions(-)
>
> diff --git a/chardev/meson.build b/chardev/meson.build
> index 4e19722c5e..32377af383 100644
> --- a/chardev/meson.build
> +++ b/chardev/meson.build
> @@ -29,7 +29,7 @@ softmmu_ss.add(files('msmouse.c', 'wctablet.c',
> 'testdev.c'))
>
>  chardev_modules = {}
>
> -if config_host.has_key('CONFIG_BRLAPI')
> +if brlapi.found()
>    module_ss = ss.source_set()
>    module_ss.add(when: [brlapi], if_true: [files('baum.c'), pixman])
>    chardev_modules += { 'baum': module_ss }
> diff --git a/configure b/configure
> index 74eebfd692..42b39544d4 100755
> --- a/configure
> +++ b/configure
> @@ -306,7 +306,7 @@ for opt do
>    esac
>  done
>
> -brlapi="$default_feature"
> +brlapi="auto"
>  curl="$default_feature"
>  iconv="auto"
>  curses="auto"
> @@ -1105,9 +1105,9 @@ for opt do
>    ;;
>    --enable-xen-pci-passthrough) xen_pci_passthrough="enabled"
>    ;;
> -  --disable-brlapi) brlapi="no"
> +  --disable-brlapi) brlapi="disabled"
>    ;;
> -  --enable-brlapi) brlapi="yes"
> +  --enable-brlapi) brlapi="enabled"
>    ;;
>    --disable-kvm) kvm="disabled"
>    ;;
> @@ -3425,26 +3425,6 @@ for drv in $audio_drv_list; do
>      esac
>  done
>
> -##########################################
> -# BrlAPI probe
> -
> -if test "$brlapi" != "no" ; then
> -  brlapi_libs="-lbrlapi"
> -  cat > $TMPC << EOF
> -#include <brlapi.h>
> -#include <stddef.h>
> -int main( void ) { return brlapi__openConnection (NULL, NULL, NULL); }
> -EOF
> -  if compile_prog "" "$brlapi_libs" ; then
> -    brlapi=yes
> -  else
> -    if test "$brlapi" = "yes" ; then
> -      feature_not_found "brlapi" "Install brlapi devel"
> -    fi
> -    brlapi=no
> -  fi
> -fi
> -
>  ##########################################
>  # curl probe
>  if test "$curl" != "no" ; then
> @@ -6134,10 +6114,6 @@ if test "$curl" = "yes" ; then
>    echo "CURL_CFLAGS=$curl_cflags" >> $config_host_mak
>    echo "CURL_LIBS=$curl_libs" >> $config_host_mak
>  fi
> -if test "$brlapi" = "yes" ; then
> -  echo "CONFIG_BRLAPI=y" >> $config_host_mak
> -  echo "BRLAPI_LIBS=$brlapi_libs" >> $config_host_mak
> -fi
>  if test "$gtk" = "yes" ; then
>    echo "CONFIG_GTK=y" >> $config_host_mak
>    echo "GTK_CFLAGS=$gtk_cflags" >> $config_host_mak
> @@ -6971,7 +6947,7 @@ NINJA=$ninja $meson setup \
>          -Dcocoa=$cocoa -Dmpath=$mpath -Dsdl=$sdl -Dsdl_image=$sdl_image \
>          -Dvnc=$vnc -Dvnc_sasl=$vnc_sasl -Dvnc_jpeg=$vnc_jpeg
> -Dvnc_png=$vnc_png \
>          -Dgettext=$gettext -Dxkbcommon=$xkbcommon -Du2f=$u2f
> -Dvirtiofsd=$virtiofsd \
> -        -Dcapstone=$capstone -Dslirp=$slirp -Dfdt=$fdt \
> +        -Dcapstone=$capstone -Dslirp=$slirp -Dfdt=$fdt -Dbrlapi=$brlapi \
>          -Diconv=$iconv -Dcurses=$curses -Dlibudev=$libudev\
>          -Ddocs=$docs -Dsphinx_build=$sphinx_build -Dinstall_blobs=$blobs \
>          -Dvhost_user_blk_server=$vhost_user_blk_server \
> diff --git a/meson.build b/meson.build
> index bb198f792a..70f81121d7 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -570,8 +570,21 @@ if have_system and not get_option('curses').disabled()
>  endif
>
>  brlapi = not_found
> -if 'CONFIG_BRLAPI' in config_host
> -  brlapi = declare_dependency(link_args:
> config_host['BRLAPI_LIBS'].split())
> +if not get_option('brlapi').auto() or have_system
>

with some new legit conditional check, ok


> +  brlapi = cc.find_library('brlapi', has_headers: ['brlapi.h'],
> +                         required: get_option('brlapi'),
> +                         static: enable_static)
> +  if brlapi.found() and not cc.links('''
> +     #include <brlapi.h>
> +     #include <stddef.h>
> +     int main(void) { return brlapi__openConnection (NULL, NULL, NULL);
> }''', dependencies: brlapi)
> +    brlapi = not_found
> +    if get_option('brlapi').enabled()
> +      error('could not link brlapi')
> +    else
> +      warning('could not link brlapi, disabling')
> +    endif
> +  endif
>  endif
>
>  sdl = not_found
> @@ -854,6 +867,7 @@
> config_host_data.set_quoted('CONFIG_QEMU_LOCALSTATEDIR',
> get_option('prefix') /
>  config_host_data.set_quoted('CONFIG_QEMU_MODDIR', get_option('prefix') /
> qemu_moddir)
>  config_host_data.set_quoted('CONFIG_SYSCONFDIR', get_option('prefix') /
> get_option('sysconfdir'))
>
> +config_host_data.set('CONFIG_BRLAPI', brlapi.found())
>  config_host_data.set('CONFIG_COCOA', cocoa.found())
>  config_host_data.set('CONFIG_LIBUDEV', libudev.found())
>  config_host_data.set('CONFIG_MPATH', mpathpersist.found())
> @@ -2164,7 +2178,7 @@ summary_info += {'xen support':
>  config_host.has_key('CONFIG_XEN_BACKEND')}
>  if config_host.has_key('CONFIG_XEN_BACKEND')
>    summary_info += {'xen ctrl version':
> config_host['CONFIG_XEN_CTRL_INTERFACE_VERSION']}
>  endif
> -summary_info += {'brlapi support':
> config_host.has_key('CONFIG_BRLAPI')}
> +summary_info += {'brlapi support':    brlapi.found()}
>  summary_info += {'Documentation':     build_docs}
>  summary_info += {'PIE':               get_option('b_pie')}
>  summary_info += {'vde support':       config_host.has_key('CONFIG_VDE')}
> diff --git a/meson_options.txt b/meson_options.txt
> index 242e0769fb..62efe96a91 100644
> --- a/meson_options.txt
> +++ b/meson_options.txt
> @@ -40,6 +40,8 @@ option('cfi', type: 'boolean', value: 'false',
>  option('cfi_debug', type: 'boolean', value: 'false',
>         description: 'Verbose errors in case of CFI violation')
>
> +option('brlapi', type : 'feature', value : 'auto',
> +       description: 'brlapi character device driver')
>  option('cocoa', type : 'feature', value : 'auto',
>         description: 'Cocoa user interface (macOS only)')
>  option('mpath', type : 'feature', value : 'auto',
> --
> 2.29.2
>
>
>