[LLVMbugs] [Bug 13457] New: [Windows] Explicit __cdecl function pointers are not compatible with implicit ones

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Wed Jul 25 06:20:20 PDT 2012


             Bug #: 13457
           Summary: [Windows] Explicit __cdecl function pointers are not
                    compatible with implicit ones
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: timurrrr at google.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

See also http://llvm.org/bugs/show_bug.cgi?id=13344#c5

As of r160667,
$ cat cdecl_pointer.cpp
typedef void (__cdecl * PTR)();

void foo() {}

void bar(PTR h) {}

int main() {

$ clang -c cdecl_pointer.cpp && echo "OK"

$ clang -c -Xclang -cxx-abi -Xclang microsoft cdecl_pointer.cpp && echo "OK" ||
echo "FAIL"
cdecl_pointer.cpp:8:3: error: no matching function for call to 'bar'
cdecl_pointer.cpp:5:6: note: candidate function not viable: no known conversion
from 'void (*)()' to 'PTR' (aka 'void (*)() __attribute__((cdecl))') for 1st
void bar(PTR h) {}
1 error generated.

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