Don't check version for fallback not-found dependency

Otherwise we get an error while checking the subproject version:

  Uncomparable version string 'none'.

If the dependency was found as a not-found dependency in the
subproject and is not required, just take it.

1 files changed, 6 insertions, 0 deletions

diff --git a/mesonbuild/interpreter.py b/mesonbuild/interpreter.py
index 121b8f0..3aa3b23 100644
--- a/mesonbuild/interpreter.py
+++ b/mesonbuild/interpreter.py
@@ -2805,6 +2805,12 @@ external dependencies (including libraries) must go to "dependencies".''')
         if not dep:
             return False
         found = dep.version_method([], {})
+        # Don't do a version check if the dependency is not found and not required
+        if found == 'none' and not required:
+            subproj_path = os.path.join(self.subproject_dir, dirname)
+            mlog.log('Dependency', mlog.bold(name), 'from subproject',
+                     mlog.bold(subproj_path), 'found:', mlog.red('NO'), '(cached)')
+            return dep
         if self.check_subproject_version(wanted, found):
             subproj_path = os.path.join(self.subproject_dir, dirname)
             mlog.log('Dependency', mlog.bold(name), 'from subproject',