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-rw-r--r--pch/inc/clangfix.hxx31
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diff --git a/pch/inc/clangfix.hxx b/pch/inc/clangfix.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#ifdef __clang__
+// This is a bit lame, but when using -DMACRO that wasn't present when the PCH was built,
+// Clang suddenly subjects it to the -Wunused-macros check, which isn't the case otherwise.
+// And many of these macros are not actually used. So use them here to silence the warnings.
+// See gb_PrecompiledHeader_ignore_flags_system in solenv/gbuild/PrecompiledHeaders.mk .
+
+#ifdef FASTSAX_DLLIMPLEMENTATION
+#endif
+#ifdef SAX_DLLIMPLEMENTATION
+#endif
+#ifdef SCQAHELPER_DLLIMPLEMENTATION
+#endif
+#ifdef SYSTEM_EXPAT
+#endif
+#ifdef SYSTEM_LIBXML
+#endif
+#ifdef SYSTEM_ZLIB
+#endif
+
+#endif // __clang__
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */