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-rw-r--r--src/libexpr/lexer.l4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/libexpr/lexer.l b/src/libexpr/lexer.l
index f6e83926b..7298419d9 100644
--- a/src/libexpr/lexer.l
+++ b/src/libexpr/lexer.l
@@ -12,6 +12,10 @@
%{
+#ifdef __clang__
+#pragma clang diagnostic ignored "-Wunneeded-internal-declaration"
+#endif
+
#include <boost/lexical_cast.hpp>
#include "nixexpr.hh"