https://bugs.llvm.org/show_bug.cgi?id=37885
Bug ID: 37885
Summary: static object mangling conflicts
Product: clang
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: zhong...@pku.org.cn
CC: dgre...@apple.com, llvm-bugs@lists.llvm.org
I found that gcc+ produces errors when it compiles the following code:
extern "C" void abort();
static int i;
int *p = &i;
int main()
{
int i;
{
extern int i;
i = 1;
*p = 2;
if (i == 2)
abort ();
}
return 0;
}
When compiling the above code, clang++ does not produce any errors. The code
comes from https://bugs.llvm.org/show_bug.cgi?id=5966
Indeed, the situation is more complicated. The above bug report of clang says
that the code comes from a bug report of gcc:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31775
I reported the difference to gcc:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86181
After reading the bug report, Richard Biener made the following comment: "I
think the clang bug is incomplete and misses the 2nd TU which defines i. So
GCC works (and the testcase is in the testsuite)."
Is this a recurring bug in clang? Hope that the comment from Richard Biener can
further improve clang.
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