qdoc: Remove -fPIC from default options when Q_OS_WIN

This update only adds -fPIC to the options passed to clang
if Q_OS_WIN is not defined.

Change-Id: I473ac14a026aecff141ab6d16e6283efe7bc5bd5
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

src/qdoc/clangcodeparser.cpp

@@ -1079,7 +1079,9 @@ void ClangCodeParser::parseHeaderFile(const Location & /*location*/, const QStri
 
 static const char *defaultArgs_[] = {
     "-std=c++14",
+#ifndef Q_OS_WIN
     "-fPIC",
+#endif
     "-fno-exceptions", // Workaround for clang bug http://reviews.llvm.org/D17988
     "-DQ_QDOC",
     "-DQT_DISABLE_DEPRECATED_BEFORE=0",
@@ -1442,7 +1444,7 @@ Node* ClangCodeParser::parseFnArg(const Location& location, const QString& fnArg
                                                                CXTranslationUnit_SkipFunctionBodies |
                                                                CXTranslationUnit_KeepGoing);
     // Change 2nd parameter to 1 to make clang report errors.
-    CXIndex index = clang_createIndex(1, 0);
+    CXIndex index = clang_createIndex(1, Generator::debugging() ? 1 : 0);
 
     std::vector<const char *> args(std::begin(defaultArgs_), std::end(defaultArgs_));
     // Add the defines from the qdocconf file.