[PULL 22/25] meson: create have_vhost_* variables

[Paolo Bonzini <pbonzini@redhat.com>]

When using Meson options rather than config-host.h, the "when" clauses
have to be changed to if statements (which is not necessarily great,
though at least it highlights which parts of the build are per-target
and which are not).

Do that before moving vhost logic to meson.build, though for now
the variables are just based on config-host.mak data.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build       | 31 ++++++++++++++++++++-----------
 tests/meson.build |  2 +-
 tools/meson.build |  2 +-
 3 files changed, 22 insertions(+), 13 deletions(-)

diff --git a/meson.build b/meson.build
index 53654fc08e..4545905360 100644
--- a/meson.build
+++ b/meson.build
@@ -312,6 +312,15 @@ have_tpm = get_option('tpm') \
   .require(targetos != 'windows', error_message: 'TPM emulation only available on POSIX systems') \
   .allowed()
 
+# vhost
+have_vhost_user = 'CONFIG_VHOST_USER' in config_host
+have_vhost_vdpa = 'CONFIG_VHOST_VDPA' in config_host
+have_vhost_kernel = 'CONFIG_VHOST_KERNEL' in config_host
+have_vhost_net_user = 'CONFIG_VHOST_NET_USER' in config_host
+have_vhost_net_vdpa = 'CONFIG_VHOST_NET_VDPA' in config_host
+have_vhost_net = 'CONFIG_VHOST_NET' in config_host
+have_vhost_user_crypto = 'CONFIG_VHOST_CRYPTO' in config_host
+
 # Target-specific libraries and flags
 libm = cc.find_library('m', required: false)
 threads = dependency('threads')
@@ -1442,7 +1451,7 @@ has_statx_mnt_id = cc.links(statx_mnt_id_test)
 have_vhost_user_blk_server = get_option('vhost_user_blk_server') \
   .require(targetos == 'linux',
            error_message: 'vhost_user_blk_server requires linux') \
-  .require('CONFIG_VHOST_USER' in config_host,
+  .require(have_vhost_user,
            error_message: 'vhost_user_blk_server requires vhost-user support') \
   .disable_auto_if(not have_system) \
   .allowed()
@@ -2296,9 +2305,9 @@ host_kconfig = \
   (have_ivshmem ? ['CONFIG_IVSHMEM=y'] : []) + \
   (opengl.found() ? ['CONFIG_OPENGL=y'] : []) + \
   (x11.found() ? ['CONFIG_X11=y'] : []) + \
-  ('CONFIG_VHOST_USER' in config_host ? ['CONFIG_VHOST_USER=y'] : []) + \
-  ('CONFIG_VHOST_VDPA' in config_host ? ['CONFIG_VHOST_VDPA=y'] : []) + \
-  ('CONFIG_VHOST_KERNEL' in config_host ? ['CONFIG_VHOST_KERNEL=y'] : []) + \
+  (have_vhost_user ? ['CONFIG_VHOST_USER=y'] : []) + \
+  (have_vhost_vdpa ? ['CONFIG_VHOST_VDPA=y'] : []) + \
+  (have_vhost_kernel ? ['CONFIG_VHOST_KERNEL=y'] : []) + \
   (have_virtfs ? ['CONFIG_VIRTFS=y'] : []) + \
   ('CONFIG_LINUX' in config_host ? ['CONFIG_LINUX=y'] : []) + \
   (have_pvrdma ? ['CONFIG_PVRDMA=y'] : []) + \
@@ -2980,7 +2989,7 @@ if have_system or have_user
 endif
 
 vhost_user = not_found
-if targetos == 'linux' and 'CONFIG_VHOST_USER' in config_host
+if targetos == 'linux' and have_vhost_user
   libvhost_user = subproject('libvhost-user')
   vhost_user = libvhost_user.get_variable('vhost_user_dep')
 endif
@@ -3561,7 +3570,7 @@ if have_tools
              dependencies: qemuutil,
              install: true)
 
-  if 'CONFIG_VHOST_USER' in config_host
+  if have_vhost_user
     subdir('contrib/vhost-user-blk')
     subdir('contrib/vhost-user-gpu')
     subdir('contrib/vhost-user-input')
@@ -3687,12 +3696,12 @@ if 'simple' in get_option('trace_backends')
 endif
 summary_info += {'D-Bus display':     dbus_display}
 summary_info += {'QOM debugging':     get_option('qom_cast_debug')}
-summary_info += {'vhost-kernel support': config_host.has_key('CONFIG_VHOST_KERNEL')}
-summary_info += {'vhost-net support': config_host.has_key('CONFIG_VHOST_NET')}
-summary_info += {'vhost-crypto support': config_host.has_key('CONFIG_VHOST_CRYPTO')}
-summary_info += {'vhost-user support': config_host.has_key('CONFIG_VHOST_USER')}
+summary_info += {'vhost-kernel support': have_vhost_kernel}
+summary_info += {'vhost-net support': have_vhost_net}
+summary_info += {'vhost-user support': have_vhost_user}
+summary_info += {'vhost-user-crypto support': have_vhost_user_crypto}
 summary_info += {'vhost-user-blk server support': have_vhost_user_blk_server}
-summary_info += {'vhost-vdpa support': config_host.has_key('CONFIG_VHOST_VDPA')}
+summary_info += {'vhost-vdpa support': have_vhost_vdpa}
 summary_info += {'build guest agent': have_ga}
 summary(summary_info, bool_yn: true, section: 'Configurable features')
 
diff --git a/tests/meson.build b/tests/meson.build
index 4f691e8465..8e318ec513 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -68,7 +68,7 @@ test_deps = {
   'test-qht-par': qht_bench,
 }
 
-if have_tools and 'CONFIG_VHOST_USER' in config_host and 'CONFIG_LINUX' in config_host
+if have_tools and have_vhost_user and 'CONFIG_LINUX' in config_host
   executable('vhost-user-bridge',
              sources: files('vhost-user-bridge.c'),
              dependencies: [qemuutil, vhost_user])
diff --git a/tools/meson.build b/tools/meson.build
index 46977af84f..10eb3a043f 100644
--- a/tools/meson.build
+++ b/tools/meson.build
@@ -3,7 +3,7 @@ have_virtiofsd = get_option('virtiofsd') \
              error_message: 'virtiofsd requires Linux') \
     .require(seccomp.found() and libcap_ng.found(),
              error_message: 'virtiofsd requires libcap-ng-devel and seccomp-devel') \
-    .require('CONFIG_VHOST_USER' in config_host,
+    .require(have_vhost_user,
              error_message: 'virtiofsd needs vhost-user-support') \
     .disable_auto_if(not have_tools and not have_system) \
     .allowed()
-- 
2.35.1