Don't fail on not-required not-found deps in forcefallback mode

This involves the creation of a new dummy NotFoundDependency.

1 files changed, 8 insertions, 0 deletions

diff --git a/mesonbuild/dependencies/base.py b/mesonbuild/dependencies/base.py
index 27a5fcb..0114a14 100644
--- a/mesonbuild/dependencies/base.py
+++ b/mesonbuild/dependencies/base.py
@@ -257,6 +257,14 @@ class ExternalDependency(Dependency):
         return new
 
 
+class NotFoundDependency(Dependency):
+    def __init__(self, environment):
+        super().__init__('not-found', {})
+        self.env = environment
+        self.name = 'not-found'
+        self.is_found = False
+
+
 class ConfigToolDependency(ExternalDependency):
 
     """Class representing dependencies found using a config tool."""