[LLVMbugs] [Bug 14974] New: clang is too aggressive in applying #pragma weak

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=14974

             Bug #: 14974
           Summary: clang is too aggressive in applying #pragma weak
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: rafael.espindola at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Given 

#pragma weak foo
struct S {  void foo(); };
void S::foo() {}
#pragma weak zed
namespace bar {  void zed() {} }
#pragma weak bah
void bah() {}
#pragma weak baz
extern "C" void baz() {}

Clang produces a weak symbol in all cases. Gcc produces it only for baz, so it
looks like we can restrict the pragma just to extern C decls.

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