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-rw-r--r--mesonbuild/build.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/mesonbuild/build.py b/mesonbuild/build.py
index 5e6db73..edd1506 100644
--- a/mesonbuild/build.py
+++ b/mesonbuild/build.py
@@ -774,6 +774,7 @@ class BuildTarget(Target):
def extract_objects(self, srclist):
obj_src = []
+ sources_set = set(self.sources)
for src in srclist:
if isinstance(src, str):
src = File(False, self.subdir, src)
@@ -782,7 +783,7 @@ class BuildTarget(Target):
else:
raise MesonException('Object extraction arguments must be strings or Files.')
# FIXME: It could be a generated source
- if src not in self.sources:
+ if src not in sources_set:
raise MesonException('Tried to extract unknown source {}.'.format(src))
obj_src.append(src)
return ExtractedObjects(self, obj_src)