CppTools: Allow interpreting ambiguous headers as C headers

...instead of C++ headers.

For the Clang Code Model this results in using "-x c-header" instead of
"-x c++-header".

This introduces a new option in Options > C++ > "Code Model" to
configure this.

Change-Id: I8a0ce8fa6155f5ef58743ebc7f1d0b500fbf6599
Reviewed-by: David Schulz <david.schulz@qt.io>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/plugins/cpptools/cppmodelmanager_test.cpp b/src/plugins/cpptools/cppmodelmanager_test.cpp
index d5f0b2fc09..4db38959c3 100644
--- a/src/plugins/cpptools/cppmodelmanager_test.cpp
+++ b/src/plugins/cpptools/cppmodelmanager_test.cpp
@@ -877,7 +877,8 @@ void CppToolsPlugin::test_modelmanager_precompiled_headers()
         BaseEditorDocumentParser::Configuration config = parser->configuration();
         config.usePrecompiledHeaders = true;
         parser->setConfiguration(config);
-        parser->update({CppModelManager::instance()->workingCopy(), nullptr, false});
+        parser->update({CppModelManager::instance()->workingCopy(), nullptr,
+                        Language::Cxx, false});
 
         // Check if defines from pch are considered
         Document::Ptr document = mm->document(fileName);
@@ -955,7 +956,8 @@ void CppToolsPlugin::test_modelmanager_defines_per_editor()
         BaseEditorDocumentParser::Configuration config = parser->configuration();
         config.editorDefines = editorDefines.toUtf8();
         parser->setConfiguration(config);
-        parser->update({CppModelManager::instance()->workingCopy(), nullptr, false});
+        parser->update({CppModelManager::instance()->workingCopy(), nullptr,
+                        Language::Cxx, false});
 
         Document::Ptr doc = mm->document(main1File);
         QCOMPARE(nameOfFirstDeclaration(doc), firstDeclarationName);