Clang: Consolidate all ClangCompilerOptionsBuilder into one implementation

We used the same code in different but don't shared it. From a bug fixing
perspective it's actually not that smart.

Change-Id: Iaaffc883229e259ff77f95b5cf0a8f0d8b5117df
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/cpptools/clangcompileroptionsbuilder.cpp

@@ -0,0 +1,165 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "clangcompileroptionsbuilder.h"
+
+#include <coreplugin/icore.h>
+
+#include <projectexplorer/projectexplorerconstants.h>
+
+#include <utils/qtcassert.h>
+
+#include <QDir>
+
+namespace CppTools {
+
+static QString creatorResourcePath()
+{
+#ifndef UNIT_TESTS
+    return Core::ICore::instance()->resourcePath();
+#else
+    return QString();
+#endif
+}
+
+QStringList ClangCompilerOptionsBuilder::build(const CppTools::ProjectPart *projectPart,
+                                               CppTools::ProjectFile::Kind fileKind,
+                                               PchUsage pchUsage,
+                                               const QString &clangVersion,
+                                               const QString &clangResourceDirectory)
+{
+    if (projectPart) {
+        ClangCompilerOptionsBuilder builder(*projectPart, clangVersion, clangResourceDirectory);
+
+        builder.addWordWidth();
+        builder.addTargetTriple();
+        builder.addLanguageOption(fileKind);
+        builder.addOptionsForLanguage(/*checkForBorlandExtensions*/ true);
+        builder.enableExceptions();
+
+        builder.addDefineToAvoidIncludingGccOrMinGwIntrinsics();
+        builder.addDefineFloat128ForMingw();
+        builder.addToolchainAndProjectDefines();
+        builder.undefineCppLanguageFeatureMacrosForMsvc2015();
+
+        builder.addPredefinedMacrosAndHeaderPathsOptions();
+        builder.addWrappedQtHeadersIncludePath();
+        builder.addPrecompiledHeaderOptions(pchUsage);
+        builder.addHeaderPathOptions();
+        builder.addProjectConfigFileInclude();
+
+        builder.addMsvcCompatibilityVersion();
+
+        builder.addExtraOptions();
+
+        return builder.options();
+    }
+
+    return QStringList();
+}
+
+ClangCompilerOptionsBuilder::ClangCompilerOptionsBuilder(const CppTools::ProjectPart &projectPart,
+                                                         const QString &clangVersion,
+                                                         const QString &clangResourceDirectory)
+    : CompilerOptionsBuilder(projectPart),
+      m_clangVersion(clangVersion),
+      m_clangResourceDirectory(clangResourceDirectory)
+{
+}
+
+bool ClangCompilerOptionsBuilder::excludeHeaderPath(const QString &path) const
+{
+    if (m_projectPart.toolchainType == ProjectExplorer::Constants::CLANG_TOOLCHAIN_TYPEID) {
+        if (path.contains("lib/gcc/i686-apple-darwin"))
+            return true;
+    }
+
+    return CompilerOptionsBuilder::excludeHeaderPath(path);
+}
+
+void ClangCompilerOptionsBuilder::addPredefinedMacrosAndHeaderPathsOptions()
+{
+    if (m_projectPart.toolchainType == ProjectExplorer::Constants::MSVC_TOOLCHAIN_TYPEID)
+        addPredefinedMacrosAndHeaderPathsOptionsForMsvc();
+    else
+        addPredefinedMacrosAndHeaderPathsOptionsForNonMsvc();
+}
+
+void ClangCompilerOptionsBuilder::addPredefinedMacrosAndHeaderPathsOptionsForMsvc()
+{
+    add("-nostdinc");
+    add("-undef");
+}
+
+void ClangCompilerOptionsBuilder::addPredefinedMacrosAndHeaderPathsOptionsForNonMsvc()
+{
+    static const QString resourceDir = clangIncludeDirectory();
+    if (QTC_GUARD(!resourceDir.isEmpty())) {
+        add("-nostdlibinc");
+        add("-I" + QDir::toNativeSeparators(resourceDir));
+        add("-undef");
+    }
+}
+
+void ClangCompilerOptionsBuilder::addWrappedQtHeadersIncludePath()
+{
+    static const QString wrappedQtHeadersPath = creatorResourcePath()
+            + "/cplusplus/wrappedQtHeaders";
+
+    if (m_projectPart.qtVersion != CppTools::ProjectPart::NoQt) {
+        const QString wrappedQtCoreHeaderPath = wrappedQtHeadersPath + "/QtCore";
+        add("-I" + QDir::toNativeSeparators(wrappedQtHeadersPath));
+        add("-I" + QDir::toNativeSeparators(wrappedQtCoreHeaderPath));
+    }
+}
+
+void ClangCompilerOptionsBuilder::addProjectConfigFileInclude()
+{
+    if (!m_projectPart.projectConfigFile.isEmpty()) {
+        add("-include");
+        add(QDir::toNativeSeparators(m_projectPart.projectConfigFile));
+    }
+}
+
+void ClangCompilerOptionsBuilder::addExtraOptions()
+{
+    add("-fmessage-length=0");
+    add("-fdiagnostics-show-note-include-stack");
+    add("-fmacro-backtrace-limit=0");
+    add("-fretain-comments-from-system-headers");
+    add("-ferror-limit=1000");
+}
+
+QString ClangCompilerOptionsBuilder::clangIncludeDirectory() const
+{
+    QDir dir(creatorResourcePath() + "/clang/lib/clang/" + m_clangVersion + "/include");
+
+    if (!dir.exists() || !QFileInfo(dir, "stdint.h").exists())
+        dir = QDir(m_clangResourceDirectory);
+
+    return dir.canonicalPath();
+}
+
+} // namespace CppTools