https://bugs.llvm.org/show_bug.cgi?id=42516
Bug ID: 42516
Summary: "duplicate symbol" when using
"-fprofile-instr-generate" and "using namespace std;"
is used in two .cpp files
Product: clang
Version: 8.0
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: LLVM Codegen
Assignee: unassignedclangb...@nondot.org
Reporter: alorb...@adiscon.com
CC: llvm-bugs@lists.llvm.org, neeil...@live.com,
richard-l...@metafoo.co.uk
So I am trying to do coverage with -fprofile-instr-generate and
-fcoverage-mapping on Windows with clang-8 (confirmed that devel clang 9 has
the same problem).
So if have a library porject that have two .cpp files in your project which use
this on top:
using namespace std;
Once the compiled library is linked, you will get this error:
Error duplicate symbol: __profn_??_G_Facet_base@std@@UEAAPEAXI@Z in
project.lib(code1.obj) and in project.lib(code2.obj)
I could nail the problem down the namespace std, if you remove it from one if
the code files it will link.
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