These trivial options can now be handled via the new generic code
that parses meson_options.txt

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 configure         | 316 +---------------------------------------------
 meson_options.txt |   2 +-
 2 files changed, 5 insertions(+), 313 deletions(-)

diff --git a/configure b/configure
index b3e6d51916..cb125c3f84 100755
--- a/configure
+++ b/configure
@@ -291,34 +291,14 @@ for opt do
   esac
 done
 
-brlapi="auto"
-curl="auto"
-iconv="auto"
-curses="auto"
-docs="auto"
 fdt="auto"
 netmap="no"
 sdl="auto"
-sdl_image="auto"
 coreaudio="auto"
-virtiofsd="auto"
-virtfs="auto"
-libudev="auto"
-mpath="auto"
-vnc="auto"
-sparse="auto"
 vde="$default_feature"
-vnc_sasl="auto"
-vnc_jpeg="auto"
-vnc_png="auto"
-xkbcommon="auto"
 xen=${default_feature:+disabled}
 xen_ctrl_version="$default_feature"
-xen_pci_passthrough="auto"
 linux_aio="$default_feature"
-linux_io_uring="auto"
-cap_ng="auto"
-attr="auto"
 xfs="$default_feature"
 tcg="enabled"
 membarrier="$default_feature"
@@ -328,15 +308,8 @@ vhost_crypto="$default_feature"
 vhost_scsi="$default_feature"
 vhost_vsock="$default_feature"
 vhost_user="no"
-vhost_user_blk_server="auto"
 vhost_user_fs="$default_feature"
 vhost_vdpa="$default_feature"
-bpf="auto"
-kvm="auto"
-hax="auto"
-hvf="auto"
-whpx="auto"
-nvmm="auto"
 rdma="$default_feature"
 pvrdma="$default_feature"
 gprof="no"
@@ -362,7 +335,6 @@ bsd="no"
 linux="no"
 solaris="no"
 profiler="no"
-cocoa="auto"
 softmmu="yes"
 linux_user="no"
 bsd_user="no"
@@ -374,45 +346,23 @@ trace_backends="log"
 trace_file="trace"
 spice="$default_feature"
 spice_protocol="auto"
-rbd="auto"
-smartcard="auto"
-u2f="auto"
-libusb="auto"
-usb_redir="auto"
 opengl="$default_feature"
 cpuid_h="no"
 avx2_opt="$default_feature"
 capstone="auto"
-lzo="auto"
-snappy="auto"
-bzip2="auto"
-lzfse="auto"
-zstd="auto"
 guest_agent="$default_feature"
 guest_agent_with_vss="no"
 guest_agent_ntddscsi="no"
-guest_agent_msi="auto"
 vss_win32_sdk="$default_feature"
 win_sdk="no"
 want_tools="$default_feature"
-libiscsi="auto"
-libnfs="auto"
 coroutine=""
 coroutine_pool="$default_feature"
 debug_stack_usage="no"
 crypto_afalg="no"
 cfi="false"
 cfi_debug="false"
-seccomp="auto"
-glusterfs="auto"
-gtk="auto"
 tls_priority="NORMAL"
-gnutls="auto"
-nettle="auto"
-gcrypt="auto"
-auth_pam="auto"
-vte="auto"
-virglrenderer="auto"
 tpm="$default_feature"
 libssh="$default_feature"
 live_block_migration=${default_feature:-yes}
@@ -428,25 +378,17 @@ vdi=${default_feature:-yes}
 vvfat=${default_feature:-yes}
 qed=${default_feature:-yes}
 parallels=${default_feature:-yes}
-libxml2="auto"
 debug_mutex="no"
-libpmem="auto"
 default_devices="true"
 plugins="$default_feature"
 fuzzing="no"
 rng_none="no"
 secret_keyring="$default_feature"
-libdaxctl="auto"
 meson=""
 ninja=""
 skip_meson=no
-gettext="auto"
-fuse="auto"
-fuse_lseek="auto"
-multiprocess="auto"
 slirp_smbd="$default_feature"
 
-malloc_trim="auto"
 gio="$default_feature"
 
 # parse CC options second
@@ -982,38 +924,10 @@ for opt do
   ;;
   --enable-sdl) sdl="enabled"
   ;;
-  --disable-sdl-image) sdl_image="disabled"
-  ;;
-  --enable-sdl-image) sdl_image="enabled"
-  ;;
   --disable-qom-cast-debug) qom_cast_debug="no"
   ;;
   --enable-qom-cast-debug) qom_cast_debug="yes"
   ;;
-  --disable-virtfs) virtfs="disabled"
-  ;;
-  --enable-virtfs) virtfs="enabled"
-  ;;
-  --disable-libudev) libudev="disabled"
-  ;;
-  --enable-libudev) libudev="enabled"
-  ;;
-  --disable-virtiofsd) virtiofsd="disabled"
-  ;;
-  --enable-virtiofsd) virtiofsd="enabled"
-  ;;
-  --disable-mpath) mpath="disabled"
-  ;;
-  --enable-mpath) mpath="enabled"
-  ;;
-  --disable-vnc) vnc="disabled"
-  ;;
-  --enable-vnc) vnc="enabled"
-  ;;
-  --disable-gettext) gettext="disabled"
-  ;;
-  --enable-gettext) gettext="enabled"
-  ;;
   --oss-lib=*) oss_lib="$optarg"
   ;;
   --audio-drv-list=*) audio_drv_list="$optarg"
@@ -1046,24 +960,8 @@ for opt do
   ;;
   --disable-tsan) tsan="no"
   ;;
-  --enable-sparse) sparse="enabled"
-  ;;
-  --disable-sparse) sparse="disabled"
-  ;;
   --disable-strip) strip_opt="no"
   ;;
-  --disable-vnc-sasl) vnc_sasl="disabled"
-  ;;
-  --enable-vnc-sasl) vnc_sasl="enabled"
-  ;;
-  --disable-vnc-jpeg) vnc_jpeg="disabled"
-  ;;
-  --enable-vnc-jpeg) vnc_jpeg="enabled"
-  ;;
-  --disable-vnc-png) vnc_png="disabled"
-  ;;
-  --enable-vnc-png) vnc_png="enabled"
-  ;;
   --disable-slirp) slirp="disabled"
   ;;
   --enable-slirp) slirp="enabled"
@@ -1084,51 +982,15 @@ for opt do
   ;;
   --enable-xen) xen="enabled"
   ;;
-  --disable-xen-pci-passthrough) xen_pci_passthrough="disabled"
-  ;;
-  --enable-xen-pci-passthrough) xen_pci_passthrough="enabled"
-  ;;
-  --disable-brlapi) brlapi="disabled"
-  ;;
-  --enable-brlapi) brlapi="enabled"
-  ;;
-  --disable-kvm) kvm="disabled"
-  ;;
-  --enable-kvm) kvm="enabled"
-  ;;
-  --disable-hax) hax="disabled"
-  ;;
-  --enable-hax) hax="enabled"
-  ;;
-  --disable-hvf) hvf="disabled"
-  ;;
-  --enable-hvf) hvf="enabled"
-  ;;
-  --disable-nvmm) nvmm="disabled"
-  ;;
-  --enable-nvmm) nvmm="enabled"
-  ;;
-  --disable-whpx) whpx="disabled"
-  ;;
-  --enable-whpx) whpx="enabled"
-  ;;
   --disable-tcg-interpreter) tcg_interpreter="false"
   ;;
   --enable-tcg-interpreter) tcg_interpreter="true"
   ;;
-  --disable-cap-ng)  cap_ng="disabled"
-  ;;
-  --enable-cap-ng) cap_ng="enabled"
-  ;;
   --disable-tcg) tcg="disabled"
                  plugins="no"
   ;;
   --enable-tcg) tcg="enabled"
   ;;
-  --disable-malloc-trim) malloc_trim="disabled"
-  ;;
-  --enable-malloc-trim) malloc_trim="enabled"
-  ;;
   --disable-spice) spice="no"
   ;;
   --enable-spice)
@@ -1141,20 +1003,8 @@ for opt do
   ;;
   --enable-spice-protocol) spice_protocol="yes"
   ;;
-  --disable-libiscsi) libiscsi="disabled"
-  ;;
-  --enable-libiscsi) libiscsi="enabled"
-  ;;
-  --disable-libnfs) libnfs="disabled"
-  ;;
-  --enable-libnfs) libnfs="enabled"
-  ;;
   --enable-profiler) profiler="yes"
   ;;
-  --disable-cocoa) cocoa="disabled"
-  ;;
-  --enable-cocoa) cocoa="enabled"
-  ;;
   --disable-system) softmmu="no"
   ;;
   --enable-system) softmmu="yes"
@@ -1202,18 +1052,6 @@ for opt do
   ;;
   --disable-cfi-debug) cfi_debug="false"
   ;;
-  --disable-curses) curses="disabled"
-  ;;
-  --enable-curses) curses="enabled"
-  ;;
-  --disable-iconv) iconv="disabled"
-  ;;
-  --enable-iconv) iconv="enabled"
-  ;;
-  --disable-curl) curl="disabled"
-  ;;
-  --enable-curl) curl="enabled"
-  ;;
   --disable-fdt) fdt="disabled"
   ;;
   --enable-fdt) fdt="enabled"
@@ -1226,22 +1064,10 @@ for opt do
   ;;
   --enable-linux-aio) linux_aio="yes"
   ;;
-  --disable-linux-io-uring) linux_io_uring="disabled"
-  ;;
-  --enable-linux-io-uring) linux_io_uring="enabled"
-  ;;
-  --disable-attr) attr="disabled"
-  ;;
-  --enable-attr) attr="enabled"
-  ;;
   --disable-membarrier) membarrier="no"
   ;;
   --enable-membarrier) membarrier="yes"
   ;;
-  --disable-bpf) bpf="disabled"
-  ;;
-  --enable-bpf) bpf="enabled"
-  ;;
   --disable-blobs) blobs="false"
   ;;
   --with-pkgversion=*) pkgversion="$optarg"
@@ -1258,10 +1084,6 @@ for opt do
   ;;
   --disable-crypto-afalg) crypto_afalg="no"
   ;;
-  --disable-docs) docs="disabled"
-  ;;
-  --enable-docs) docs="enabled"
-  ;;
   --disable-vhost-net) vhost_net="no"
   ;;
   --enable-vhost-net) vhost_net="yes"
@@ -1278,10 +1100,6 @@ for opt do
   ;;
   --enable-vhost-vsock) vhost_vsock="yes"
   ;;
-  --disable-vhost-user-blk-server) vhost_user_blk_server="disabled"
-  ;;
-  --enable-vhost-user-blk-server) vhost_user_blk_server="enabled"
-  ;;
   --disable-vhost-user-fs) vhost_user_fs="no"
   ;;
   --enable-vhost-user-fs) vhost_user_fs="yes"
@@ -1290,60 +1108,14 @@ for opt do
   ;;
   --enable-opengl) opengl="yes"
   ;;
-  --disable-rbd) rbd="disabled"
-  ;;
-  --enable-rbd) rbd="enabled"
-  ;;
   --disable-xfsctl) xfs="no"
   ;;
   --enable-xfsctl) xfs="yes"
   ;;
-  --disable-smartcard) smartcard="disabled"
-  ;;
-  --enable-smartcard) smartcard="enabled"
-  ;;
-  --disable-u2f) u2f="disabled"
-  ;;
-  --enable-u2f) u2f="enabled"
-  ;;
-  --disable-libusb) libusb="disabled"
-  ;;
-  --enable-libusb) libusb="enabled"
-  ;;
-  --disable-usb-redir) usb_redir="disabled"
-  ;;
-  --enable-usb-redir) usb_redir="enabled"
-  ;;
-  --disable-zlib-test)
-  ;;
-  --disable-lzo) lzo="disabled"
-  ;;
-  --enable-lzo) lzo="enabled"
-  ;;
-  --disable-snappy) snappy="disabled"
-  ;;
-  --enable-snappy) snappy="enabled"
-  ;;
-  --disable-bzip2) bzip2="disabled"
-  ;;
-  --enable-bzip2) bzip2="enabled"
-  ;;
-  --enable-lzfse) lzfse="enabled"
-  ;;
-  --disable-lzfse) lzfse="disabled"
-  ;;
-  --disable-zstd) zstd="disabled"
-  ;;
-  --enable-zstd) zstd="enabled"
-  ;;
   --enable-guest-agent) guest_agent="yes"
   ;;
   --disable-guest-agent) guest_agent="no"
   ;;
-  --enable-guest-agent-msi) guest_agent_msi="enabled"
-  ;;
-  --disable-guest-agent-msi) guest_agent_msi="disabled"
-  ;;
   --with-vss-sdk) vss_win32_sdk=""
   ;;
   --with-vss-sdk=*) vss_win32_sdk="$optarg"
@@ -1360,12 +1132,6 @@ for opt do
   ;;
   --disable-tools) want_tools="no"
   ;;
-  --enable-seccomp) seccomp="enabled"
-  ;;
-  --disable-seccomp) seccomp="disabled"
-  ;;
-  --disable-glusterfs) glusterfs="disabled"
-  ;;
   --disable-avx2) avx2_opt="no"
   ;;
   --enable-avx2) avx2_opt="yes"
@@ -1374,9 +1140,6 @@ for opt do
   ;;
   --enable-avx512f) avx512f_opt="yes"
   ;;
-
-  --enable-glusterfs) glusterfs="enabled"
-  ;;
   --disable-virtio-blk-data-plane|--enable-virtio-blk-data-plane)
       echo "$0: $opt is obsolete, virtio-blk data-plane is always on" >&2
   ;;
@@ -1386,28 +1149,8 @@ for opt do
   --enable-uuid|--disable-uuid)
       echo "$0: $opt is obsolete, UUID support is always built" >&2
   ;;
-  --disable-gtk) gtk="disabled"
-  ;;
-  --enable-gtk) gtk="enabled"
-  ;;
   --tls-priority=*) tls_priority="$optarg"
   ;;
-  --disable-gnutls) gnutls="disabled"
-  ;;
-  --enable-gnutls) gnutls="enabled"
-  ;;
-  --disable-nettle) nettle="disabled"
-  ;;
-  --enable-nettle) nettle="enabled"
-  ;;
-  --disable-gcrypt) gcrypt="disabled"
-  ;;
-  --enable-gcrypt) gcrypt="enabled"
-  ;;
-  --disable-auth-pam) auth_pam="disabled"
-  ;;
-  --enable-auth-pam) auth_pam="enabled"
-  ;;
   --enable-rdma) rdma="yes"
   ;;
   --disable-rdma) rdma="no"
@@ -1416,14 +1159,6 @@ for opt do
   ;;
   --disable-pvrdma) pvrdma="no"
   ;;
-  --disable-vte) vte="disabled"
-  ;;
-  --enable-vte) vte="enabled"
-  ;;
-  --disable-virglrenderer) virglrenderer="disabled"
-  ;;
-  --enable-virglrenderer) virglrenderer="enabled"
-  ;;
   --disable-tpm) tpm="no"
   ;;
   --enable-tpm) tpm="yes"
@@ -1440,10 +1175,6 @@ for opt do
   ;;
   --enable-numa) numa="yes"
   ;;
-  --disable-libxml2) libxml2="disabled"
-  ;;
-  --enable-libxml2) libxml2="enabled"
-  ;;
   --disable-tcmalloc) tcmalloc="no"
   ;;
   --enable-tcmalloc) tcmalloc="yes"
@@ -1525,14 +1256,6 @@ for opt do
   ;;
   --disable-debug-mutex) debug_mutex=no
   ;;
-  --enable-libpmem) libpmem="enabled"
-  ;;
-  --disable-libpmem) libpmem="disabled"
-  ;;
-  --enable-xkbcommon) xkbcommon="enabled"
-  ;;
-  --disable-xkbcommon) xkbcommon="disabled"
-  ;;
   --enable-plugins) if test "$mingw32" = "yes"; then
                         error_exit "TCG plugins not currently supported on Windows platforms"
                     else
@@ -1559,22 +1282,6 @@ for opt do
   ;;
   --disable-keyring) secret_keyring="no"
   ;;
-  --enable-libdaxctl) libdaxctl="enabled"
-  ;;
-  --disable-libdaxctl) libdaxctl="disabled"
-  ;;
-  --enable-fuse) fuse="enabled"
-  ;;
-  --disable-fuse) fuse="disabled"
-  ;;
-  --enable-fuse-lseek) fuse_lseek="enabled"
-  ;;
-  --disable-fuse-lseek) fuse_lseek="disabled"
-  ;;
-  --enable-multiprocess) multiprocess="enabled"
-  ;;
-  --disable-multiprocess) multiprocess="disabled"
-  ;;
   --enable-gio) gio=yes
   ;;
   --disable-gio) gio=no
@@ -5213,25 +4920,10 @@ if test "$skip_meson" = no; then
         -Db_pie=$(if test "$pie" = yes; then echo true; else echo false; fi) \
         ${staticpic:+-Db_staticpic=$staticpic} \
         -Db_coverage=$(if test "$gcov" = yes; then echo true; else echo false; fi) \
-        -Db_lto=$lto -Dcfi=$cfi -Dcfi_debug=$cfi_debug \
-        -Dmalloc=$malloc -Dmalloc_trim=$malloc_trim -Dsparse=$sparse \
-        -Dkvm=$kvm -Dhax=$hax -Dwhpx=$whpx -Dhvf=$hvf -Dnvmm=$nvmm \
-        -Dxen=$xen -Dxen_pci_passthrough=$xen_pci_passthrough -Dtcg=$tcg \
-        -Dcocoa=$cocoa -Dgtk=$gtk -Dmpath=$mpath -Dsdl=$sdl -Dsdl_image=$sdl_image \
-        -Dlibusb=$libusb -Dsmartcard=$smartcard -Dusb_redir=$usb_redir -Dvte=$vte \
-        -Dvnc=$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 -Dbrlapi=$brlapi \
-        -Dcurl=$curl -Dglusterfs=$glusterfs -Dbzip2=$bzip2 -Dlibiscsi=$libiscsi \
-        -Dlibnfs=$libnfs -Diconv=$iconv -Dcurses=$curses -Dlibudev=$libudev\
-        -Drbd=$rbd -Dlzo=$lzo -Dsnappy=$snappy -Dlzfse=$lzfse -Dlibxml2=$libxml2 \
-        -Dlibdaxctl=$libdaxctl -Dlibpmem=$libpmem -Dlinux_io_uring=$linux_io_uring \
-        -Dgnutls=$gnutls -Dnettle=$nettle -Dgcrypt=$gcrypt -Dauth_pam=$auth_pam \
-        -Dzstd=$zstd -Dseccomp=$seccomp -Dvirtfs=$virtfs -Dcap_ng=$cap_ng \
-        -Dattr=$attr -Ddefault_devices=$default_devices -Dvirglrenderer=$virglrenderer \
-        -Ddocs=$docs -Dsphinx_build=$sphinx_build -Dinstall_blobs=$blobs \
-        -Dvhost_user_blk_server=$vhost_user_blk_server -Dmultiprocess=$multiprocess \
-        -Dfuse=$fuse -Dfuse_lseek=$fuse_lseek -Dguest_agent_msi=$guest_agent_msi -Dbpf=$bpf\
+        -Db_lto=$lto -Dcfi=$cfi -Dcfi_debug=$cfi_debug -Dmalloc=$malloc \
+        -Ddefault_devices=$default_devices -Dxen=$xen -Dtcg=$tcg -Dsdl=$sdl \
+        -Dcapstone=$capstone -Dslirp=$slirp -Dfdt=$fdt \
+        -Dsphinx_build=$sphinx_build -Dinstall_blobs=$blobs \
         $(if test "$default_feature" = no; then echo "-Dauto_features=disabled"; fi) \
         -Dtcg_interpreter=$tcg_interpreter $meson_options \
         $cross_arg \
diff --git a/meson_options.txt b/meson_options.txt
index a9a9b8f4c6..2c89e79e8b 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -120,7 +120,7 @@ option('usb_redir', type : 'feature', value : 'auto',
        description: 'libusbredir support')
 option('virglrenderer', type : 'feature', value : 'auto',
        description: 'virgl rendering support')
-option('vnc', type : 'feature', value : 'enabled',
+option('vnc', type : 'feature', value : 'auto',
        description: 'VNC server')
 option('vnc_jpeg', type : 'feature', value : 'auto',
        description: 'JPEG lossy compression for VNC server')
-- 
2.27.0

On Sun, Aug 29, 2021 at 07:32:09PM +0200, Thomas Huth wrote:
> These trivial options can now be handled via the new generic code
> that parses meson_options.txt
> 
> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  configure         | 316 +---------------------------------------------
>  meson_options.txt |   2 +-
>  2 files changed, 5 insertions(+), 313 deletions(-)

Picking on one example...

> 
> diff --git a/configure b/configure
> index b3e6d51916..cb125c3f84 100755
> --- a/configure
> +++ b/configure
> @@ -291,34 +291,14 @@ for opt do
>    esac
>  done
>  
> -brlapi="auto"

> -  --disable-brlapi) brlapi="disabled"
> -  ;;
> -  --enable-brlapi) brlapi="enabled"
> -  ;;

> @@ -5213,25 +4920,10 @@ if test "$skip_meson" = no; then
>          -Db_pie=$(if test "$pie" = yes; then echo true; else echo false; fi) \
>          ${staticpic:+-Db_staticpic=$staticpic} \
>          -Db_coverage=$(if test "$gcov" = yes; then echo true; else echo false; fi) \
> -        -Db_lto=$lto -Dcfi=$cfi -Dcfi_debug=$cfi_debug \
> -        -Dmalloc=$malloc -Dmalloc_trim=$malloc_trim -Dsparse=$sparse \
> -        -Dkvm=$kvm -Dhax=$hax -Dwhpx=$whpx -Dhvf=$hvf -Dnvmm=$nvmm \
> -        -Dxen=$xen -Dxen_pci_passthrough=$xen_pci_passthrough -Dtcg=$tcg \
> -        -Dcocoa=$cocoa -Dgtk=$gtk -Dmpath=$mpath -Dsdl=$sdl -Dsdl_image=$sdl_image \
> -        -Dlibusb=$libusb -Dsmartcard=$smartcard -Dusb_redir=$usb_redir -Dvte=$vte \
> -        -Dvnc=$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 -Dbrlapi=$brlapi \

Pre-patch, if you used neither --enable-brlapi nor --disable-brlapi,
we called $meson with -Dbrlapi=auto.

> +        -Db_lto=$lto -Dcfi=$cfi -Dcfi_debug=$cfi_debug -Dmalloc=$malloc \
> +        -Ddefault_devices=$default_devices -Dxen=$xen -Dtcg=$tcg -Dsdl=$sdl \
> +        -Dcapstone=$capstone -Dslirp=$slirp -Dfdt=$fdt \
> +        -Dsphinx_build=$sphinx_build -Dinstall_blobs=$blobs \
>          $(if test "$default_feature" = no; then echo "-Dauto_features=disabled"; fi) \
>          -Dtcg_interpreter=$tcg_interpreter $meson_options \

Post-patch, if you use an option, $meson_options includes
-Dbrlapi=disabled or -Dbrlapi=enabled (per patch 1), but if you omit
an option, now we aren't passing anything.  Does meson treat
-Dbrlapi=auto and the absence of any mention of brlapi identically?
If so, then this patch is good; if not, you are stripping too much.

>          $cross_arg \
> diff --git a/meson_options.txt b/meson_options.txt
> index a9a9b8f4c6..2c89e79e8b 100644
> --- a/meson_options.txt
> +++ b/meson_options.txt
> @@ -120,7 +120,7 @@ option('usb_redir', type : 'feature', value : 'auto',
>         description: 'libusbredir support')
>  option('virglrenderer', type : 'feature', value : 'auto',
>         description: 'virgl rendering support')
> -option('vnc', type : 'feature', value : 'enabled',
> +option('vnc', type : 'feature', value : 'auto',
>         description: 'VNC server')

Why is the default for this option changed?  It looks unrelated to the
mechanical changes in the rest of the patch, enough so to warrant its
own patch, or at least special mention in the commit message.

But I think I just answered my question above: in meson_options.txt,
we typically default an unspecified option to 'auto'.  So now it's
just making sure that all such options removed from configure in this
patch have a sane default.

/me goes reading...

Yep, every option deleted above appears with 'auto' in
meson_options.txt.  It's annoying that we did not have consistent
ordering in any of the three places; alphabetic might have been nice;
we even had --disable-glusterfs and --enable-glusterfs split by
unrelated options in the case statement.

Whether you split the patch or amend the commit message, I've now done
enough review that I'm happy if you add:

Reviewed-by: Eric Blake <eblake@redhat.com>

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

On 30/08/2021 17.06, Eric Blake wrote:
> On Sun, Aug 29, 2021 at 07:32:09PM +0200, Thomas Huth wrote:
>> These trivial options can now be handled via the new generic code
>> that parses meson_options.txt
>>
>> Signed-off-by: Thomas Huth <thuth@redhat.com>
>> ---
>>   configure         | 316 +---------------------------------------------
>>   meson_options.txt |   2 +-
>>   2 files changed, 5 insertions(+), 313 deletions(-)
> 
> Picking on one example...
> 
>>
>> diff --git a/configure b/configure
>> index b3e6d51916..cb125c3f84 100755
>> --- a/configure
>> +++ b/configure
>> @@ -291,34 +291,14 @@ for opt do
>>     esac
>>   done
>>   
>> -brlapi="auto"
> 
>> -  --disable-brlapi) brlapi="disabled"
>> -  ;;
>> -  --enable-brlapi) brlapi="enabled"
>> -  ;;
> 
>> @@ -5213,25 +4920,10 @@ if test "$skip_meson" = no; then
>>           -Db_pie=$(if test "$pie" = yes; then echo true; else echo false; fi) \
>>           ${staticpic:+-Db_staticpic=$staticpic} \
>>           -Db_coverage=$(if test "$gcov" = yes; then echo true; else echo false; fi) \
>> -        -Db_lto=$lto -Dcfi=$cfi -Dcfi_debug=$cfi_debug \
>> -        -Dmalloc=$malloc -Dmalloc_trim=$malloc_trim -Dsparse=$sparse \
>> -        -Dkvm=$kvm -Dhax=$hax -Dwhpx=$whpx -Dhvf=$hvf -Dnvmm=$nvmm \
>> -        -Dxen=$xen -Dxen_pci_passthrough=$xen_pci_passthrough -Dtcg=$tcg \
>> -        -Dcocoa=$cocoa -Dgtk=$gtk -Dmpath=$mpath -Dsdl=$sdl -Dsdl_image=$sdl_image \
>> -        -Dlibusb=$libusb -Dsmartcard=$smartcard -Dusb_redir=$usb_redir -Dvte=$vte \
>> -        -Dvnc=$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 -Dbrlapi=$brlapi \
> 
> Pre-patch, if you used neither --enable-brlapi nor --disable-brlapi,
> we called $meson with -Dbrlapi=auto.
> 
>> +        -Db_lto=$lto -Dcfi=$cfi -Dcfi_debug=$cfi_debug -Dmalloc=$malloc \
>> +        -Ddefault_devices=$default_devices -Dxen=$xen -Dtcg=$tcg -Dsdl=$sdl \
>> +        -Dcapstone=$capstone -Dslirp=$slirp -Dfdt=$fdt \
>> +        -Dsphinx_build=$sphinx_build -Dinstall_blobs=$blobs \
>>           $(if test "$default_feature" = no; then echo "-Dauto_features=disabled"; fi) \
>>           -Dtcg_interpreter=$tcg_interpreter $meson_options \
> 
> Post-patch, if you use an option, $meson_options includes
> -Dbrlapi=disabled or -Dbrlapi=enabled (per patch 1), but if you omit
> an option, now we aren't passing anything.  Does meson treat
> -Dbrlapi=auto and the absence of any mention of brlapi identically?

I can confirm what you've already discovered later in your review already: 
The "auto" setting is used by default in meson_options.txt already.

>> diff --git a/meson_options.txt b/meson_options.txt
>> index a9a9b8f4c6..2c89e79e8b 100644
>> --- a/meson_options.txt
>> +++ b/meson_options.txt
>> @@ -120,7 +120,7 @@ option('usb_redir', type : 'feature', value : 'auto',
>>          description: 'libusbredir support')
>>   option('virglrenderer', type : 'feature', value : 'auto',
>>          description: 'virgl rendering support')
>> -option('vnc', type : 'feature', value : 'enabled',
>> +option('vnc', type : 'feature', value : 'auto',
>>          description: 'VNC server')
> 
> Why is the default for this option changed?  It looks unrelated to the
> mechanical changes in the rest of the patch, enough so to warrant its
> own patch, or at least special mention in the commit message.

Agreed, I think I'll best split it into a separate patch. For the context: I 
should have changed this already in 3a6a1256d46daa2121 ("configure: Allow 
vnc to get disabled with --without-default-features"), but I was not aware 
of the duplicated values between meson_options.txt and the configure script 
at that point in time yet.

  Thomas

On 8/30/21 8:06 AM, Eric Blake wrote:
> Does meson treat
> -Dbrlapi=auto and the absence of any mention of brlapi identically?

I believe the default is right there in meson_options.txt:

option('brlapi', type : 'feature', value : 'auto',
        description: 'brlapi character device driver')

with value: 'auto'


r~