diff options
Diffstat (limited to 'lib/Sema/SemaDecl.cpp')
| -rw-r--r-- | lib/Sema/SemaDecl.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp index 4c6da45e5b..245bc2c0e7 100644 --- a/lib/Sema/SemaDecl.cpp +++ b/lib/Sema/SemaDecl.cpp @@ -6793,7 +6793,8 @@ bool Sema::CheckFunctionDeclaration(Scope *S, FunctionDecl *NewFD, // If this function is declared as being extern "C", then check to see if // the function returns a UDT (class, struct, or union type) that is not C // compatible, and if it does, warn the user. - if (NewFD->isExternC()) { + // But, issue any diagnostic on the first declaration only. + if (NewFD->isExternC() && Previous.empty()) { QualType R = NewFD->getResultType(); if (R->isIncompleteType() && !R->isVoidType()) Diag(NewFD->getLocation(), diag::warn_return_value_udt_incomplete) |