https://bugs.llvm.org/show_bug.cgi?id=37844
Bug ID: 37844
Summary: clang++ does not produce error messages
Product: clang
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
The code is as follow:
namespace N {
extern "C" {
extern const int foobar;
const int foobar = 1;
struct S { static const int foobar; };
const int S::foobar = 2;
}
}
int main () { return !(N::foobar + 1 == N::S::foobar); }
clang++ accepts the code, but g++ produces error messages:
conflicting declaration of ‘const int N::S::foobar’ with ‘C’ linkage
const int S::foobar = 2;
previous declaration with ‘C++’ linkage
struct S { static const int foobar; };
Indeed, the code comes from a bug report of gcc
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=33786). A previous version of g++
produces a different error message, but was fixed in the latest version. Martin
Sebor analyzed why the above code is ill-formed. Please check this problem.
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