va: Fix -Wl,--version-script check with LLD 17

LLD 17 uses --no-undefined-version by default, so the check currently
fails due to vaCreateSurface being undefined. This commit replaces that
check with a generic check in the top level meson.build, using the
conftest.syms file.

Signed-off-by: Violet Purcell <vimproved@inventati.org>

conftest.syms

@@ -0,0 +1,6 @@
+VERSION_1 {
+    global:
+        main;
+    local:
+        *;
+};

meson.build

@@ -87,6 +87,12 @@ dl_dep = cc.find_library('dl', required : false)
 WITH_DRM = not get_option('disable_drm') and (host_machine.system() != 'windows')
 libdrm_dep = dependency('libdrm', version : '>= 2.4.60', required : (host_machine.system() != 'windows'))
 
+ld_supports_version_script = cc.links(
+  'int main() { return 0; }',
+  name : '-Wl,--version-script',
+  args : ['-shared', '-Wl,--version-script,' + '@0@/@1@'.format(meson.current_source_dir(), 'conftest.syms')]
+)
+
 WITH_X11 = false
 if get_option('with_x11') != 'no'
   x11_dep = dependency('x11', required : get_option('with_x11') == 'yes')

va/meson.build

@@ -60,7 +60,7 @@ libva_sym_arg = '-Wl,-version-script,' + '@0@/@1@'.format(meson.current_source_d
 
 libva_link_args = []
 libva_link_depends = []
-if cc.links('', name: '-Wl,--version-script', args: ['-shared', libva_sym_arg])
+if ld_supports_version_script
   libva_link_args = libva_sym_arg
   libva_link_depends = libva_sym
 endif