Fix Vala thread flag breakage (#2756)

mesonbuild/compilers/vala.py

@@ -95,8 +95,8 @@ class ValaCompiler(Compiler):
         mlog.debug('Searched {!r} and {!r} wasn\'t found'.format(extra_dirs, libname))
         return None
 
-    def thread_flags(self):
+    def thread_flags(self, env):
         return []
 
-    def thread_link_flags(self):
+    def thread_link_flags(self, env):
         return []

test cases/vala/23 thread flags/meson.build

@@ -0,0 +1,7 @@
+project('thread flags', 'c', 'vala')
+
+glib = dependency('glib-2.0')
+gobject = dependency('gobject-2.0')
+threads = dependency('threads')
+
+e = executable('valaprog', 'prog.vala', dependencies: [glib, gobject, threads])

test cases/vala/23 thread flags/prog.vala

@@ -0,0 +1,2 @@
+void main () {
+}