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, 1 deletions

diff --git a/src/plugins/cpptools/cpptoolsconstants.h b/src/plugins/cpptools/cpptoolsconstants.h
index 11a5f1a1ab..18192317ce 100644
--- a/src/plugins/cpptools/cpptoolsconstants.h
+++ b/src/plugins/cpptools/cpptoolsconstants.h
@@ -51,10 +51,13 @@ enum { lowerCaseFilesDefault = 1 };
 const char CPPTOOLS_SORT_EDITOR_DOCUMENT_OUTLINE[] = "SortedMethodOverview";
 const char CPPTOOLS_SHOW_INFO_BAR_FOR_HEADER_ERRORS[] = "ShowInfoBarForHeaderErrors";
 const char CPPTOOLS_MODEL_MANAGER_PCH_USAGE[] = "PCHUsage";
+const char CPPTOOLS_INTERPRET_AMBIGIUOUS_HEADERS_AS_C_HEADERS[]
+    = "InterpretAmbiguousHeadersAsCHeaders";
 const char CPPTOOLS_SKIP_INDEXING_BIG_FILES[] = "SkipIndexingBigFiles";
 const char CPPTOOLS_INDEXER_FILE_SIZE_LIMIT[] = "IndexerFileSizeLimit";
 
-const char CPP_CLANG_BUILTIN_CONFIG_ID_EVERYTHING_WITH_EXCEPTIONS[] = "Builtin.EverythingWithExceptions";
+const char CPP_CLANG_BUILTIN_CONFIG_ID_EVERYTHING_WITH_EXCEPTIONS[]
+    = "Builtin.EverythingWithExceptions";
 
 const char CPP_CODE_STYLE_SETTINGS_ID[] = "A.Cpp.Code Style";
 const char CPP_CODE_STYLE_SETTINGS_NAME[] = QT_TRANSLATE_NOOP("CppTools", "Code Style");