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// { dg-do preprocess }
// { dg-options "-std=gnu99 -fdiagnostics-show-option -Werror=unused-macros" }
/* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
#define X X // { dg-error "-:macro \"X\" is not used .-Werror=unused-macros." }
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