[PATCH] meson: Declare have_virtfs_proxy_helper in main meson.build

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

have_virtfs_proxy_helper is used from docs/meson.build, and can be
not declared when including it before fsdev/meson.build. This fixes:

  ../docs/meson.build:54:2: ERROR: Unknown variable "have_virtfs_proxy_helper".

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 meson.build       | 2 ++
 fsdev/meson.build | 1 -
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index 3d889857a09..8f5a8b997d3 100644
--- a/meson.build
+++ b/meson.build
@@ -1032,6 +1032,8 @@
     libattr.found() and
     libcap_ng.found())
 
+have_virtfs_proxy_helper = have_virtfs and have_tools
+
 if get_option('virtfs').enabled()
   if not have_virtfs
     if targetos != 'linux'
diff --git a/fsdev/meson.build b/fsdev/meson.build
index 65455a179e5..adf57cc43ed 100644
--- a/fsdev/meson.build
+++ b/fsdev/meson.build
@@ -8,7 +8,6 @@
 ), if_false: files('qemu-fsdev-dummy.c'))
 softmmu_ss.add_all(when: 'CONFIG_LINUX', if_true: fsdev_ss)
 
-have_virtfs_proxy_helper = have_tools and libattr.found() and libcap_ng.found() and have_virtfs
 if have_virtfs_proxy_helper
   executable('virtfs-proxy-helper',
              files('virtfs-proxy-helper.c', '9p-marshal.c', '9p-iov-marshal.c'),
-- 
2.26.2