dependencies/llvm: Mark as not found when not found

When either the shard or static libs are not available, and the
dependency is not required mark the dependency as not found and return.

Fixes #4360

1 files changed, 3 insertions, 0 deletions

diff --git a/mesonbuild/dependencies/dev.py b/mesonbuild/dependencies/dev.py
index 1e7c3e8a1..47beb4e3b 100644
--- a/mesonbuild/dependencies/dev.py
+++ b/mesonbuild/dependencies/dev.py
@@ -310,6 +310,7 @@ class LLVMDependency(ConfigToolDependency):
                 if not matches:
                     if self.required:
                         raise
+                    self.is_found = False
                     return
 
                 self.link_args = self.get_config_value(['--ldflags'], 'link_args')
@@ -326,6 +327,8 @@ class LLVMDependency(ConfigToolDependency):
             except DependencyException:
                 if self.required:
                     raise
+                self.is_found = False
+                return
 
         link_args = ['--link-static', '--system-libs'] if self.static else ['--link-shared']
         self.link_args = self.get_config_value(