use PCH for clang plugin source too, if enabled

This currently supports only building with Clang on Linux, as
I'm lazy to handle the other cases (and Clang should be usually
self-built anyway). The main compile time cost is in optimizing
the code, but this still saves few seconds per source.

Change-Id: Ib6c0fd874820af737ee1257cb5234fb78bc63ad8
Reviewed-on: https://gerrit.libreoffice.org/80810
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/compilerplugins/clang/precompiled_clang.hxx b/compilerplugins/clang/precompiled_clang.hxx
new file mode 100644
index 000000000000..926580353883
--- /dev/null
+++ b/compilerplugins/clang/precompiled_clang.hxx
@@ -0,0 +1,54 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * Based on LLVM/Clang.
+ *
+ * This file is distributed under the University of Illinois Open Source
+ * License. See LICENSE.TXT for details.
+ *
+ */
+
+// This file is generated manually. Is it based on the output of
+// cat *.cxx *.hxx | grep '#include' | grep 'clang/' | sort -u
+
+#if PCH_LEVEL >= 1
+#include <clang/AST/ASTConsumer.h>
+#include <clang/AST/ASTContext.h>
+#include <clang/AST/Attr.h>
+#include <clang/AST/Comment.h>
+#include <clang/AST/CXXInheritance.h>
+#include <clang/AST/DeclBase.h>
+#include <clang/AST/DeclCXX.h>
+#include <clang/AST/Decl.h>
+#include <clang/AST/DeclTemplate.h>
+#include <clang/AST/ExprCXX.h>
+#include <clang/AST/Expr.h>
+#include <clang/AST/RecursiveASTVisitor.h>
+#include <clang/AST/StmtVisitor.h>
+#include <clang/AST/Type.h>
+#include <clang/Basic/FileManager.h>
+#include <clang/Basic/OperatorKinds.h>
+#include <clang/Basic/SourceManager.h>
+#include <clang/Frontend/CompilerInstance.h>
+#include <clang/Frontend/FrontendAction.h>
+#include <clang/Frontend/FrontendActions.h>
+#include <clang/Frontend/FrontendPluginRegistry.h>
+#include <clang/Lex/Lexer.h>
+#include <clang/Lex/PPCallbacks.h>
+#include <clang/Lex/Preprocessor.h>
+#include <clang/Rewrite/Core/Rewriter.h>
+#include <clang/Sema/SemaDiagnostic.h>
+#include <clang/Sema/Sema.h>
+#include <clang/Sema/SemaInternal.h>
+#include <clang/Tooling/CommonOptionsParser.h>
+#include <clang/Tooling/Refactoring.h>
+#endif
+
+#if PCH_LEVEL >= 2
+// These are included by everything anyway.
+#include "plugin.hxx"
+#include "check.hxx"
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */