http://llvm.org/bugs/show_bug.cgi?id=22621
Bug ID: 22621
Summary: Itanium ABI: mangling issue with external names in
template args (gcc vs. ABI)
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
The following example from the ABI (5.1.5)
void foo(char) {}
template <void (&)(char)> struct CB {};
void bar(CB<foo> cb) {}
produces the following mangling for bar():
_Z3bar2CBILZ3foocEE
According to the ABI the 'Z' in the middle is supposed to be
preceded by an underscore, foo being a name with external linkage.
There's a FIXME comment in CXXNameMangler::mangleTemplateArg() in
ItaniumMangle.cpp saying that gcc leaves out the underscore. This
is why clang does so, too.
Is the priority to conform to the ABI or to be as compatible with
gcc as possible?
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