meson: Don't use expat on windows

It's not really needed, and there's no debian package for it so we're
forced to fall back to wraps in mesa's CI. This can be problematic in
itself.

Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>

diff --git a/meson.build b/meson.build
index e65dcf482aa531281ebe41c5dc1b7b8acb519e0d..ac52833f41706086cae4b314a5531c3625de6ce6 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -1265,7 +1265,11 @@ if dep_thread.found() and host_machine.system() != 'windows'
     pre_args += '-DPTHREAD_SETAFFINITY_IN_NP_HEADER'
   endif
 endif
-dep_expat = dependency('expat', fallback : ['expat', 'expat_dep'])
+if host_machine.system() != 'windows'
+  dep_expat = dependency('expat', fallback : ['expat', 'expat_dep'])
+else
+  dep_expat = null_dep
+endif
 # this only exists on linux so either this is linux and it will be found, or
 # it's not linux and wont
 dep_m = cc.find_library('m', required : false)