Add --suppress-system-warnings (on by default, use =0 to disable)
- For investigating warnings in system headers / builtins.
- Currently also enables the behavior that allows silent redefinition
of types in system headers. Conceptually these are separate but I
didn't feel it was worth two options (or changing LangOptions).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@56163 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 7263723..2f43507 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -276,11 +276,13 @@
// *either* declaration is in a system header. The code below implements
// this adhoc compatibility rule. FIXME: The following code will not
// work properly when compiling ".i" files (containing preprocessed output).
- SourceManager &SrcMgr = Context.getSourceManager();
- if (SrcMgr.isInSystemHeader(Old->getLocation()))
- return New;
- if (SrcMgr.isInSystemHeader(New->getLocation()))
- return New;
+ if (PP.getDiagnostics().getSuppressSystemWarnings()) {
+ SourceManager &SrcMgr = Context.getSourceManager();
+ if (SrcMgr.isInSystemHeader(Old->getLocation()))
+ return New;
+ if (SrcMgr.isInSystemHeader(New->getLocation()))
+ return New;
+ }
Diag(New->getLocation(), diag::err_redefinition, New->getName());
Diag(Old->getLocation(), diag::err_previous_definition);