[flang-commits] [flang] 410ec6d - [flang] Disable new -Wused-undefined-variable warning by default (#174151)

[via flang-commits]

Author: Peter Klausler
Date: 2026-01-01T09:31:57-08:00
New Revision: 410ec6d42bc451e12db99b89a1b5225c51e9f141

URL: https://github.com/llvm/llvm-project/commit/410ec6d42bc451e12db99b89a1b5225c51e9f141
DIFF: https://github.com/llvm/llvm-project/commit/410ec6d42bc451e12db99b89a1b5225c51e9f141.diff

LOG: [flang] Disable new -Wused-undefined-variable warning by default (#174151)

The new warning about local variables that are used without possible
being defined or initialized may be generating some false positives;
disable it by default for now.

Added: 
    

Modified: 
    flang/lib/Support/Fortran-features.cpp

Removed: 
    


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diff  --git a/flang/lib/Support/Fortran-features.cpp b/flang/lib/Support/Fortran-features.cpp
index 7544306a2b3fc..356050f22b443 100644
--- a/flang/lib/Support/Fortran-features.cpp
+++ b/flang/lib/Support/Fortran-features.cpp
@@ -152,7 +152,6 @@ LanguageFeatureControl::LanguageFeatureControl() {
   // New warnings, on by default
   warnLanguage_.set(LanguageFeature::SavedLocalInSpecExpr);
   warnLanguage_.set(LanguageFeature::NullActualForAllocatable);
-  warnUsage_.set(UsageWarning::UsedUndefinedVariable);
   warnUsage_.set(UsageWarning::BadValueInDeadCode);
 }