https://llvm.org/bugs/show_bug.cgi?id=23838
Bug ID: 23838
Summary: multiple definitions of static variables inside
functions
Product: new-bugs
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Clang is not generating comdats for static variables of classes with virtual
members.
$ cat > h.h
class error_category {
public:
virtual void fn() {}
};
inline error_category& make_error_code() {
static error_category C;
return C;
}
$ cat > t1.cpp
#include "h.h"
int main(int argc, char **argv) {
make_error_code();
return 0;
}
$ cat > t2.cpp
#include "h.h"
void foo() {
make_error_code();
}
$ clang++ -std=c++11 t1.cpp t2.cpp -target i686-windows-gnu
C:\Dev\MSys2\tmp\test2-135e49.o:(.data+0x0): multiple definition of
`make_error_code()::C'
C:\Dev\MSys2\tmp\test-bf4e7c.o:(.data+0x0): first defined here
clang++.exe: error: linker command failed with exit code 1 (use -v to see
invocation)
I'm targeting Mingw here, but it doesn't work when targeting MSVC either.
Removing virtual from 'void fn()' makes clang work.
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